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ASME SA-312-07


2007 SECTION II, PART A

SA-312 /SA-312M

SPECIFICATION FOR SEAMLESS AND WELDED AUSTENITIC STAINLESS STEEL PIPES
SA-312 /SA-312M
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(Identical with ASTM Speci?cation A 312 /A 312M-01a except for the deletion of 5.2, revision to 6.2 to add “H” Grade heat treatment requirements and editorial differences in 7.1 and Table 1 and an editorial correction to the Cr and Ni percent chemical composition for UNS S31002 in Table 1.)

1.

Scope 1.1 This speci?cation covers seamless, straight-seam welded, and heavily cold worked welded austenitic stainless steel pipe intended for high-temperature and general corrosive service.
NOTE 1— When the impact test criterion for a low-temperature service would be 15 ft·lbf [20 J] energy absorption or 15 mils [0.38 mm] lateral expansion, some of the austenitic stainless steel grades covered by this speci?cation are accepted by certain pressure vessel or piping codes without the necessity of making the actual test. For example, Grades TP304, TP304L, and TP347 are accepted by the ASME Pressure Vessel Code, Section VIII Division 1, and by the Chemical Plant and Re?nery Piping Code, ANSI B31.3, for service at temperatures as low as ?425°F[?250°C] without quali?cation by impact tests. Other AISI stainless steel grades are usually accepted for service temperatures as low as ?325°F [?200°C] without impact testing. Impact testing may, under certain circumstances, be required. For example, materials with chromium or nickel content outside the AISI ranges, and for material with carbon content exceeding 0.10%, are required to be impact tested under the rules of ASME Section VIII Division 1 when service temperatures are lower than ?50°F [?45°C].

1.5 Grades TP321 and TP321H have lower strength requirements for pipe manufactured by the seamless process in nominal wall thicknesses greater than 3?8 in. [9.5 mm]. 1.6 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the speci?cation. The inch-pound units shall apply unless the “M” designation of this speci?cation is speci?ed in the order.
NOTE 2— The dimensionless designator NPS (nominal pipe size) has been substituted in this standard for such traditional terms as “nominal diameter,” “size,” and “nominal size.”

1.2 Grades TP304H, TP309H, TP309HCb, TP310H, TP310HCb, TP316H, TP321H, TP347H, and TP348H are modi?cations of Grades TP304, TP309Cb, TP309S, TP310Cb, TP310S, TP316, TP321, TP347, and TP348, and are intended for high-temperature service. 1.3 Optional supplementary requirements are provided for pipe where a greater degree of testing is desired. These supplementary requirements call for additional tests to be made and, when desired, one or more of these may be speci?ed in the order. 1.4 Table X1.1 lists the standardized dimensions of welded and seamless stainless steel pipe as shown in ANSI B36.19. These dimensions are also applicable to heavily cold worked pipe. Pipe having other dimensions may be furnished provided such pipe complies with all other requirements of this speci?cation.
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2.

Referenced Documents

2.1 ASTM Standards: A 262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels A 370 Test Methods and De?nitions for Mechanical Testing of Steel Products A 450 /A 450M Speci?cation for General Requirements for Carbon, Ferritic Alloy, and Austenitic Alloy Steel Tubes A 941 Terminology Relating to Steel, Stainless Steel, Related Alloys, and Ferroalloys A 999 /A 999M Speci?cation for General Requirements for Alloy and Stainless Steel Pipe E 112 Test Methods for Determining the Average Grain Size

SA-312 /SA-312M

2007 SECTION II, PART A

E 381 Method of Macroetch Testing Steel Bars, Billets, Blooms, and Forgings E 527 Practice for Numbering Metals and Alloys (UNS) 2.2 ANSI Standards: B1.20.1 Pipe Threads, General Purpose B36.10 Welded and Seamless Wrought Steel Pipe B36.19 Stainless Steel Pipe 2.3 ASME Standard: ASME Boiler and Pressure Vessel Code: Section VIII 2.4 AWS Standard: A5.9 Corrosion-Resisting Chromium and ChromiumNickel Steel Welding Rods and Electrodes 2.5 Other Standard: SAE J1086 Practice for Numbering Metals and Alloys (UNS) 2.6 Other Standard: SNT-TC-1A Personnel Quali?cation and Certi?cation in Nondestructive Testing 3. Terminology 3.1 De?nitions:
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5.

General Requirements 5.1 Material furnished under this speci?cation shall conform to the applicable requirements of the current edition of Speci?cation A 999 /A 999M unless otherwise provided herein. 5.2 DELETED

6.

Materials and Manufacture 6.1 Manufacture:

6.1.1 The pipe shall be manufactured by one of the following processes: 6.1.2 Seamless (SML) pipe shall be made by a process that does not involve welding at any stage of production. 6.1.3 Welded (WLD) pipe shall be made using an automatic welding process with no addition of ?ller metal during the welding process. 6.1.4 Heavily cold-worked (HCW) pipe shall be made by applying cold working of not less than 35% reduction in thickness of both wall and weld to a welded pipe prior to the ?nal anneal. No ?ller shall be used in making the weld. Prior to cold working, the weld shall be 100% radiographically inspected in accordance with the requirements of ASME Boiler and Pressure Vessel Code, Section VIII, Division 1, latest revision, Paragraph UW-51. 6.1.5 Welded pipe and HCW pipe of NPS 14 and smaller shall have a single longitudinal weld. Welded pipe and HCW pipe of a size larger than NPS 14 shall have a single longitudinal weld or shall be produced by forming and welding two longitudinal sections of ?at stock when approved by the purchaser. All weld tests, examinations, inspections, or treatments shall be performed on each weld seam. 6.1.6 At the option of the manufacturer, pipe shall be either hot ?nished or cold ?nished. 6.1.7 The pipe shall be free of scale and contaminating exogenous iron particles. Pickling, blasting, or surface ?nishing is not mandatory when pipe is bright annealed. The purchaser is permitted to require that a passivating treatment be applied to the ?nished pipe. 6.2 Heat Treatment— All pipe shall be furnished in the heat-treated condition in accordance with the requirements of Table 2. Other than for Grades S33228, S30815, S31272 and the “H” grades, seamless pipe immediately following hot forming may be individually quenched in water or rapidly cooled by other means, provided that the temperature of the pipes after hot forming is not less than the minimum speci?ed solution treatment temperature. For H Grades, as well as Grades S33228, S30815, and S31272, the pipes shall be reheated to the speci?ed solution treatment temperature for the required time before quenching.
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3.1.1 The de?nitions in Speci?cation A 999 /A 999M and Terminology A 941 are applicable to this speci?cation. 4. Ordering Information 4.1 Orders for material to this speci?cation should include the following, as required, to describe the desired material adequately: 4.1.1 Quantity (feet, centimetres, or number of lengths), 4.1.2 Name of material (austenitic steel pipe), 4.1.3 Process (seamless (SML) or welded (WLD) or heavily cold worked (HCW), 4.1.4 Grade (Table 1), 4.1.5 Size (NPS or outside diameter and schedule number or average wall thickness), 4.1.6 Length (speci?c or random) (Section 13), 4.1.7 End ?nish (Section on Ends of Speci?cation A 999 /A 999M), 4.1.8 Optional requirements (product analysis, see Section 8; hydrostatic or nondestructive electric test, see Section 12), 4.1.9 Test report required (Certi?cation Section of Speci?cation A 999/A 999M), 4.1.10 Speci?cation number, and 4.1.11 Special requirements or any supplementary requirements selected, or both.

2007 SECTION II, PART A

SA-312 /SA-312M

6.3 Grain Size: 6.3.1 The grain size of Grade UNS S32615, as determined in accordance with Test Methods E 112, shall be No. 3 or ?ner. 6.3.2 The grain size of grades TP309H, TP309HCb, TP310H and TP310HCb, as determined in accordance with Test Methods E 112, shall be No. 6 or coarser. 6.3.3 The grain size of grades 304H, 316H, 321H, 347H, and 348H, as determined in accordance with Test Methods E 112, shall be No. 7 or coarser. 7. Chemical Composition 7.1 The steel shall conform to the requirements as to chemical composition prescribed in Table 1. 8. Product Analysis 8.1 At the request of the purchaser, an analysis of one billet or one length of ?at-rolled stock from each heat, or two pipes from each lot shall be made by the manufacturer. A lot of pipe shall consist of the following number of lengths of the same size and wall thickness from any one heat of steel:
NPS Designator
Under 2 2 to 5 6 and over

Mechanical Tests, Grain Size Determinations, and Weld Decay Tests Required 11.1 Transverse or Longitudinal Tension Test — One tension test shall be made on a specimen for lots of not more than 100 pipes. Tension tests shall be made on specimens from two tubes for lots of more than 100 pipes.
NOTE 3 — The term “lot,” for mechanical tests, applies to all pipe of the same diameter and wall thickness (or schedule) which are produced from the same heat of steel and subjected to the same ?nishing treatment: (1) in a continuous heat-treatment furnace, (2) in a batch-type heattreatment furnace, equipped with recording pyrometers and automatically controlled within a 50°F [30°C] range, or (3) by direct quenching after hot forming, the larger of: (a) Each 200 ft [60 m] or fraction thereof or, (b) That pipe heat treated in the same batch furnace charge.

11.

Lengths of Pipe in Lot
400 or fraction thereof 200 or fraction thereof 100 or fraction thereof

8.2 The results of these analyses shall be reported to the purchaser or the purchaser’s representative, and shall conform to the requirements speci?ed in Section 7. 8.3 If the analysis of one of the tests speci?ed in 8.1 does not conform to the requirements speci?ed in Section 7, an analysis of each billet or pipe from the same heat or lot may be made, and all billets or pipe conforming to the requirements shall be accepted. 9. Permitted Variations in Wall Thickness 9.1 In addition to the implicit limitation of wall thickness for seamless pipe imposed by the limitation on weight in Speci?cation A 999 /A 999M, the wall thickness for seamless and welded pipe at any point shall be within the tolerances speci?ed in Table 3, except that for welded pipe the weld area shall not be limited by the ‘Over‘ tolerance. The wall thickness and outside diameter for inspection for compliance with this requirement for pipe ordered by NPS and schedule number is shown in Table X1.1. 10. Tensile Requirements 10.1 The tensile properties of the material shall conform to the requirements prescribed in Table 4.
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11.2 Flattening Test — For material heat treated in a batch-type furnace, ?attening tests shall be made on 5% of the pipe from each heat-treated lot. For material heat treated by the continuous process, or by direct quenching after hot forming this test shall be made on a suf?cient number of pipe to constitute 5% of the lot, but in no case less than two lengths of pipe. 11.2.1 For welded pipe a transverse-guided face bend test of the weld may be conducted instead of a ?attening test in accordance with the method outlined in the steel tubular product supplement of Test Methods and De?nitions A 370. The ductility of the weld shall be considered acceptable when there is no evidence of cracks in the weld or between the weld and the base metal after bending. Test specimens from 5% of the lot shall be taken from the pipe or test plates of the same material as the pipe, the test plates being attached to the end of the cylinder and welded as a prolongation of the pipe longitudinal seam. 11.3 Grain Size — Grain size determinations on Grades TP309H, TP309HCb, TP310H, TP310HCb, and UNS S32615 shall be made on the same number of tubes as prescribed for the ?attening test. 11.4 HCW pipe shall be capable of passing the weld decay tests listed in Supplementary S9 with a weld metal to base metal loss ratio of 0.90 to 1.1. The test is not required to be performed unless S9 is speci?ed in the purchase order. 12. Hydrostatic or Nondestructive Electric Test 12.1 Each pipe shall be subjected to the nondestructive electric test or the hydrostatic test. The type of test to be used shall be at the option of the manufacturer, unless otherwise speci?ed in the purchase order. 12.2 The hydrostatic test shall be in accordance with Speci?cation A 999 /A 999M, unless speci?cally exempted under the provisions of 12.3. 12.3 For pipe whose dimensions equal or exceed NPS 10, the purchaser, with the agreement of the manufacturer,

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SA-312 /SA-312M

2007 SECTION II, PART A

may waive the hydrostatic test requirement when in lieu of such test the purchaser performs a system test. Each length of pipe furnished without the completed manufacturer’s hydrostatic test shall include with the mandatory markings the letters “NH.” 12.4 Nondestructive Electric Test: Nondestructive electric tests shall be in accordance with Speci?cation A 999 /A 999M.
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repaired and as shown in Table 5. Alternatively, subject to approval by the purchaser, weld repairs shall be made only with the gas tungsten-arc welding process using a ?ller metal more highly alloyed than the base metal when needed for corrosion resistance or other properties. 15.4 Pipes that have had weld seam repairs with ?ller metal shall be uniquely identi?ed and shall be so stated and identi?ed on the certi?cate of tests. When ?ller metal other than that listed in Table 5 is used, the ?ller metal shall be identi?ed on the certi?cate of tests.

13. Lengths 13.1 Pipe lengths shall be in accordance with the following regular practice: 13.1.1 Unless otherwise agreed upon, all sizes from NPS 1?8 to and including NPS 8 are available in a length up to 24 ft (Note 4) with the permissible range of 15 to 24 ft (Note 4). Short lengths are acceptable and the number and minimum length shall be agreed upon between the manufacturer and the purchaser.
NOTE 4 — This value(s) applies when the inch-pound designation of this speci?cation is the basis of purchase. When the “M” designation of this speci?cation is the basis of purchase, the corresponding metric value(s) shall be agreed upon between the manufacturer and the purchaser.

16. Certi?cation 16.1 In addition to the information required by Speci?cation A 999/A 999M, the certi?cation shall state whether or not the material was hydrostatically tested. If the material was nondestructively tested, the certi?cation shall so state and shall show which standard practice was followed and what reference discontinuities were used.

13.1.2 If de?nite cut lengths are desired, the lengths required shall be speci?ed in the order. No pipe shall be under the speci?ed length and not more than 1?4 in. [6 mm] over that speci?ed. 13.1.3 No jointers are permitted unless otherwise speci?ed.

14. Workmanship, Finish, and Appearance 14.1 The ?nished pipes shall be reasonably straight and shall have a workmanlike ?nish. Imperfections may be removed by grinding, provided the wall thicknesses are not decreased to less than that permitted in Section 9 of Speci?cation A 999 /A 999M.

17. Marking 17.1 In addition to the marking speci?ed in Speci?cation A 999/A 999M, the marking shall include the NPS (nominal pipe size) or outside diameter and schedule number or average wall thickness, heat number, and NH when hydrotesting is not performed and ET when eddy-current testing is performed or UT when ultrasonic testing is performed. The marking shall also include the manufacturer’s private identifying mark, the marking requirement of 12.3, if applicable, and whether seamless (SML), welded (WLD), or heavily cold-worked (HCW). For Grades TP304H, TP316H, TP321H, TP347H, TP348H, and S30815, the marking shall also include the heat number and heat-treatment lot identi?cation. If speci?ed in the purchase order, the marking for pipe larger than NPS 4 shall include the weight.

15. Repair by Welding 15.1 For welded pipe whose diameter equals or exceeds NPS 6, and whose nominal wall thickness equals or exceeds 0.200, weld repairs made with the addition of compatible ?ller metal may be made to the weld seam with the same procedures speci?ed for plate defects in the section on Repair by Welding of Speci?cation A 999/A 999M. 15.2 Weld repairs of the weld seam shall not exceed 20% of the seam length. 15.3 Weld repairs shall be made only with the gas tungsten-arc welding process using the same classi?cation of bare ?ller rod quali?ed to the most current AWS Speci?cation A5.9 as the grade of stainless steel pipe being
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18. Government Procurement 18.1 Scale Free Pipe for Government Procurement: 18.1.1 When speci?ed in the contract or order, the following requirements shall be considered in the inquiry, contract or order, for agencies of the U.S. Government where scale free pipe or tube is required. These requirements shall take precedence if there is a con?ict between these requirements and the product speci?cations. 18.1.2 The requirements of Speci?cation A 999/A 999M for pipe and Speci?cation A 450/A 450M for tubes shall be applicable when pipe or tube is ordered to this speci?cation. 18.1.3 Pipe and tube shall be one of the following grades as speci?ed herein:

2007 SECTION II, PART A

SA-312 /SA-312M

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Grade
TP304 TP304L TP304N TP316 TP316L TP316N TP317 TP317L TP321 TP347

UNS Designation
S30400 S30403 S30451 S31600 S31603 S31651 S31700 S31703 S32100 S34700

18.1.4.1
Speci?cation Number . . . . . . . . . . . . . . . . . . . . . . . Tube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Grade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Outside Diameter. . . . . . . . . . . . . . . . . . . . . . . . . . . Wall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SMLS OR WELDED . . . . . . . . . . . . . . . . . . . . . . . ASTM A 312 T 304 0.250 0.035 WLD

18.1.4 Part Number:

Example: ASTM A 312/A 312M Pipe 304 NPS 12 SCH 40S SMLS
Speci?cation Number . . . . . . . . . . . . . . . . . . . . . . . Pipe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Grade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . NPS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Wall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SMLS OR WELDED . . . . . . . . . . . . . . . . . . . . . . . ASTM A 312 P 304 12 0.375 SML

18.1.5 Ordering Information — Orders for material under this speci?cation shall include the following in addition to the requirements of Section 4: 18.1.5.1 Pipe or tube, 18.1.5.2 Part number, 18.1.5.3 Ultrasonic inspection, if required, 18.1.5.4 If shear wave test is to be conducted in two opposite circumferential directions, 18.1.5.5 Intergranular corrosion test, and 18.1.5.6 Level of preservation and packing required. 19. Keywords 19.1 austenitic stainless steel; seamless steel pipe; stainless steel pipe; steel pipe; welded steel pipe

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TABLE 1 CHEMICAL REQUIREMENTS
Composition, %B
Silicon Boron
... ... ... ... ...

SA-312 /SA-312M

Grade Chromium Nickel Cerium Molybdenum Titanium Columbium Copper

UNS DesignationA Tantalum, max. NitrogenC Vanadium

Carbon

Manganese Phosphorus Sulfur

Aluminum
... ... ... ... ...

...

...

... TPXM-19 TPXM-10 TPXM-11 TPXM-29 TP304 TP304L TP304H ... TP304N TP304LN ... ... ... TP309S TP309H TP309Cb 0.045 0.045 0.045 0.045 0.060 0.045 0.045 0.045 0.045 0.045 0.045 0.02 0.030 0.040 0.045 0.045 0.045 0.030 0.030 0.030 0.030 0.030 0.030 0.030 0.030 0.030 0.030 0.030 0.02 0.03 0.030 0.030 0.030 0.030 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00–2.00 1.00 1.00 3.7–4.3 3.2–4.0 1.40–2.00 1.00 1.00 1.00 15.0–17.0 20.5–23.5 19.0–21.5 19.0–21.5 17.0–19.0 18.0–20.0 18.0–20.0 18.0–20.0 18.0–19.0 18.0–20.0 18.0–20.0 17.0–18.5 17.0–19.5 20.0–22.0 22.0–24.0 22.0–24.0 22.0–24.0 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 0.10–0.30 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ...
... ... ...

S20400 S20910 S21900 S21904 S24000 S30400 S30403 S30409 S30415 S30451 S30453 S30600 S30615 S30815 S30908 S30909 S30940 1.50–3.00 11.5–13.5 5.5–7.5 5.5–7.5 2.3–3.7 8.0–11.0 8.0–13.0 8.0–11.0 9.0–10.0 8.0–11.0 8.0–12.0 14.0–15.5 13.5–16.0 10.0–12.0 12.0–15.0 12.0–15.0 12.0–16.0 ... 1.50–3.00 ... ... ... ... ... ... ... ... ... 0.20 13.5–16.0 ... 0.75 ... 0.75 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 0.15–0.30 0.20–0.40 0.15–0.40 0.15–0.40 0.20–0.40 ... ... ... 0.12–0.18 0.10–0.16 0.10–0.16 ... ... 0.14–0.20 ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... 0.03–0.08 ... ... ... ... ... 0.50 max. . . . ... ... 0.03–0.08 ... ... ... ...

0.030 0.06 0.08 0.04 0.08 0.08 0.035D 0.04–0.10 0.04–0.06 0.08 0.035 0.018 0.16–0.24 0.05–0.10 0.08 0.04–0.10 0.08

7.0–9.0 4.0–6.0 8.0–10.0 8.0–10.0 11.5–14.5 2.00 2.00 2.00 0.80 2.00 2.00 2.00 2.00 0.80 2.00 2.00 2.00

... 0.80–1.50 ...

TP309HCb 0.045 0.030 1.00 22.0–24.0 ... ... 0.75 12.0–16.0

S30941

0.04–0.10 2.00

...

...

2007 SECTION II, PART A

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508
0.020 0.045 0.045 0.045 19.0–22.0 19.0–22.0 19.0–22.0 19.0–22.0 0.015 0.030 0.030 0.030 0.15 1.00 1.00 1.00 24.0–26.0 24.0–26.0 24.0–26.0 24.0–26.0 ... ... ... ... 0.10 0.75 ... 0.75 ... ... ... ...
0.045 0.030 1.00 24.0–26.0 0.75 19.0–22.0 ... ...
... ...
... ... ... ...
E

...
...
...

TP310S TP310H TP310Cb

S31002 S31008 S31009 S31040

0.015 0.08 0.04–0.10 0.08

2.00 2.00 2.00 2.00

0.10 ... ... ...

... ... ... ...

TP310HCb

S31041

0.04–0.10 2.00

...

...

... ... 0.020 0.030 0.030 0.045 0.045 0.045 0.045 0.015 0.010 0.015 0.030 0.030 0.030 0.030 0.4 0.80 0.25–0.75 1.00 1.00 1.00 0.75 24.0–26.0 19.5–20.5 14.0–16.0 16.0–18.0 16.0–18.0 16.0–18.0 16.0–18.0 20.5–23.5 17.5–18.5 14.0–16.0 11.0–14.0E 10.0–14.0 11.0–14.0E 10.0–12.0

... 0.10–0.30 ... ... ... ... ... ... ... ... ... ... ... ... ... ... C 10 min., 1.10 max. C 10 min., 1.10 max. ... ... ... C 10 min., 1.10 max. C 10 min., 1.10 max. ... ...
0.09–0.15 . . . 0.18–0.22 . . .
... ... ... ... ... ... ... 0.10

... ... 0.50–1.00 . . .
... ... ... ...

... ... ... ... 0.004–0.008

TP316 TP316L TP316H ...

S31050 S31254 S31272 S31600 S31603 S31609 S31635

0.025 0.020 0.08–0.12 0.08 0.035D 0.04–0.10 0.08

2.00 1.00 1.5–2.00 2.00 2.00 2.00 2.00

1.6–2.6 6.0–6.5 1.00–1.40 2.00–3.00 2.00–3.00 2.00–3.00 2.00–3.00

... ... 0.30–0.60 ... ... ... 5 (C+N) min, 0.70
... ... ... ... ...
G
H

... ... ... ...

... ... ... ...

...

...

TP316N TP316LN TP317 TP317L ... ... TP321 TP321H 0.045 0.045 0.045 0.045 0.040F 0.040F 0.045 0.045 0.030 0.030 0.030 0.030 0.030 0.030 0.030 0.030 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 16.0–18.0 16.0–18.0 18.0–20.0 18.0–20.0 18.0–20.0 17.0–20.0 17.0–19.0 17.0–19.0

S31651 S31653 S31700 S31703 S31725 S31726 S32100 S32109

0.08 0.035 0.08 0.035 0.03 0.03 0.08 0.04–0.10

2.00 2.00 2.00 2.00 2.00 2.00 2.00 2.00

11.0–14.0 11.0–14.0E 11.0–14.0 11.0–15.0 13.5–17.5 14.5–17.5 9.0–12.0 9.0–12.0

2.00–3.00 2.00–3.00 3.0–4.0 3.0–4.0 4.0–5.0 4.0–5.0 ... ...

... ... ... ... ... ... ...

... ... ... ... ... ... ...

0.10–0.16 0.10–0.16 ... ... 0.10 0.10–0.20 0.10 ...

... ... ... ... ... ... ... ...

... ... ... ... 0.75 0.75 ... ...

... ... ... ... ... ... ... ...

... ... ...

... ... ...

TABLE 1 CHEMICAL REQUIREMENTS (CONT’D)
Composition, %B

Grade Silicon ... ... 0.60–1.00 0.10
I J

UNS DesignationA Carbon Chromium Nickel 19.0–22.0 21.0–23.0 31.0–33.0 16.0–18.0 9.0–13.0 9.0–13.0 0.30–1.50 7.0–8.0 ... 4.0–5.0 ... ... ... ... ... ... ... ... ... ... ... ... ... ... 0.20– 0.50F, K
I J

Manganese Phosphorus Sulfur Molybdenum Titanium Columbium ... ... ... ... ... ... ... 0.45–0.55 ... 0.40–0.60 ... ... 0.045 0.030 0.020 0.030 0.045 0.045 0.030 0.005 0.015 0.010 0.030 0.030 4.8–6.0 0.50 0.30 1.00 1.00 1.00 16.5–19.5 24.0–25.0 26.0–28.0 23.0–25.0 17.0–19.0 17.0–19.0

Tantalum, max. NitrogenC Vanadium Copper 1.50–2.50 0.30–0.60 ... ... ... ...

Cerium ... ... 0.05–0.10 ... ... ... ... ... ... ...

Boron

Aluminum ... ... 0.025 ...

... ... ... ... TP347 TP347H

S32615 S32654 S33228 S34565 S34700 S34709

... ... ... ... ... ... ...

...

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TP347LN TP348 TP348H ... ... TPXM-15 ... ... ... 0.045 0.045 0.045 ... 0.040 0.030 0.040 0.040 0.030 0.030 0.030 0.030 0.015 0.030 0.030 0.030 0.030 0.010 1.00 1.00 1.00 1.00 1.20–2.00 1.50–2.50 1.00 1.00 0.50 ... ... ... ... ... ... 6.00–7.00 4.0–5.0 6.0–7.0 ... ... ... ... ... ... 9.0–13.0 9.0–13.0 9.0–13.0 32.0–37.0 34.0–36.0 17.5–18.5 23.5–25.5 23.0–28.0 19.0–21.0 ... ... ... 0.15–0.60 ... ... ... ... ... 17.0–19.0 17.0–19.0 17.0–19.0 25.-–29.0 24.0–26.0 17.0–19.0 20.00–22.00 19.0–23.0 24.0–26.0

S34751 S34800 S34809 S35045 S35315 S38100 N08367 N08904 N08926

0.07 2.00 0.020 2.0–4.0 0.04–0.08 1.00 0.03 5.0–7.0 0.08 2.00 0.04–0.10 2.00 0.005– 0.020 2.00 0.08 2.00 0.04–0.10 2.00 0.06–0.10 1.50 0.04–0.08 2.00 0.08 2.00 0.030 2.00 0.020 2.00 0.020 2.00 ... 0.10 0.10 ... ... ... ... ... ... 0.06–0.10 ... ... ... 0.12–0.18 ... 0.18–0.25 0.10 0.15–0.25 ... ... ... ... ... ... ... ... ...

... ... ... 0.75 ... ... 0.75 1.00–2.00 0.50–1.50

... ... ... ... 0.03–0.08 ... ... ... ...

0.15–0.60 ... ... ... ...

2007 SECTION II, PART A

509

A

New designation established in accordance with Practice E 527 and SAE J1086. Maximum, unless otherwise indicated. C The method of analysis for nitrogen shall be a matter of agreement between the purchaser and manufacturer. D For small diameter or thin walls or both, where many drawing passes are required, a carbon maximum of 0.040% is necessary in grades TP304L and TP316L. Small outside diameter tubes are de?ned as those less than 0.500 in. [12.7 mm] in outside diameter and light wall tubes as those less than 0.049 in. [1.20 mm] in average wall thickness (0.044 in. [1.10 mm] in minimum wall thickness). E For welded TP316, TP316N, TP316LN, and TP316H pipe, the nickel range shall be 10.0–14.0%. F For welded pipe, the phosphorus maximum shall be 0.045%. G The titanium content shall be not less than ?ve times the carbon content and not more than 0.70%. H The titanium content shall be not less than four times the carbon content and not more than 0.60%. I The columbium content shall be not less than ten times the carbon content and not more than 1.00%. J The columbium content shall be not less than eight times the carbon content and not more than 1.0%. K Grade S34751 shall have a columbium (niobium) plus tantalum content of not less than 15 times the carbon content.

B

SA-312 /SA-312M

SA-312 /SA-312M

2007 SECTION II, PART A

TABLE 2 ANNEALING REQUIREMENTS
Grade or UNS Designation A
All grades not individually listed below: TP321H, TP347H, TP348H Cold ?nished Hot ?nished TP304H, TP316H Cold ?nished Hot ?nished TP309H, TP309HCb, TP310H, TP310HCb S30600 S30815, S31272 S31254, S32654 S33228 S34565 S35315 N08367 N08904 N08926
A B

Heat Treating Temperature B

Cooling/Testing Requirements
C

1900°F [1040°C] 2000°F [1100°C] 1925°F [1050°C] 1900°F [1040°C] 1900°F [1040°C] 1900°F 2010–2140°F 1920°F 2100°F 2050–2160°F 2050–2140°F 2010°F 2025°F 2000°F 2010°F [1040°C] [1100–1170°C] [1050°C] [1150°C] [1120–1180°C] [1120–1170°C] [1100°C] [1110°C] [1100°C] [1100°C]

D D

D D

D D D D D D D D D D

New designation established in accordance with Practice E 527 and SAE J1086. Minimum, unless otherwise stated. C Quenched in water or rapidly cooled by other means, at a rate suf?cient to prevent reprecipitation of carbides, as demonstrable by the capability of passing Practices A 262, Practice E. The manufacturer is not required to run the test unless it is speci?ed on the purchase order (see Supplementary Requirement S7). Note that Practices A 262 requires the test to be performed on sensitized specimens in the low–carbon and stabilized types and on specimens representative of the as-shipped condition for other types. In the case of low-carbon types containing 3% or more molybdenum, the applicability of the sensitizing treatment prior to testing shall be a matter for negotiation between the seller and the purchaser. D Quenched in water or rapidly cooled by other means.

TABLE 3 PERMITTED VARIATIONS IN WALL THICKNESS
Tolerance, % from Nominal
NPS Designator
?8 to 2 ?2 incl., all t/D ratios 3 to 18 incl., t/D up to 5% incl. 3 to 18 incl., t/D > 5% 20 and larger, welded, all t/D ratios 20 and larger, seamless, t/D up to 5% incl. 20 and larger, seamless, t/D > 5%
where:
1 1

Over
20.0 22.5 15.0 17.5 22.5 15.0

Under
12.5 12.5 12.5 12.5 12.5 12.5

t p Nominal Wall Thickness D p Ordered Outside Diameter

510

2007 SECTION II, PART A

SA-312 /SA-312M

TABLE 4 TENSILE REQUIREMENTS
Tensile Strength, Min. ksi [MPa]
95 100 90 90 100 75 70 75 87 80 75 78 90 87 75 75 75 75 73 75 75 75 75 [635] [690] [620] [620] [690] [515] [485] [515] [600] [550] [515] [540] [620] [600] [515] [515] [515] [515] [500] [515] [515] [515] [515]

Grade
... TPXM-19 TPXM-10 TPXM-11 TPXM-29 TP304 TP304L TP304H ... TP304N TP304LN ... ... ... TP309S TP309H TP309Cb TP309HCb TP310S TP310H TP310Cb TP310HCb ... t ≤ 0.25 in. t > 0.25 in. ... t ≤ 0.187 in. [5.00 mm] t > 0.187 in. [5.00 mm] TP316 TP316L TP316H ... TP316N TP316LN TP317 TP317L ... ... TP321 Welded Seamless: ≤ 3?8 in. > 3?8 in. TP321H Welded Seamless: ≤ 3?16 in. > 3?16 in. ... ... ... ... TP347 TP347H TP347LN TP348 TP348H ... ...

UNS Designation
S20400 S20910 S21900 S21904 S24000 S30400 S30403 S30409 S30415 S30451 S30453 S30600 S30615 S30815 S30908 S30909 S30940 S30941 S31002 S31008 S31009 S31040 S31041 S31050:

Yield Strength, Min. ksi [MPa]
48 55 50 50 55 30 25 30 42 35 30 35 40 45 30 30 30 30 30 30 30 30 30 [330] [380] [345] [345] [380] [205] [170] [205] [290] [240] [205] [240] [275] [310] [205] [205] [205] [205] [205] [205] [205] [205] [205]

TABLE 4 TENSILE REQUIREMENTS (CONT’D)
Tensile Strength, Min. ksi [MPa]
75 [515] 100 95 71 94 [690] [655] [490] [650]

Grade
TPXM-15 ... t ≤ 0.187 t > 0.187 ... ...

UNS Designation
S38100 N08367:

Yield Strength, Min. ksi [MPa]
30 [205] 45 45 31 43 [310] [310] [215] [295]

N08904 N08926

Elongation in 2 in. or 50 mm (or 4D), Min., %:
All Grades except S31050 and S32615 S32615, S31050 N08367

Longitudinal
35 25 30

Transverse
25 ... ...

84 [580] 78 [540] S31254: 98 95 65 75 70 75 75 80 75 75 75 75 80 [675] [655] [450] [515] [485] [515] [515] [550] [515] [515] [515] [515] [550]

39 [270] 37 [255] 45 45 29 30 25 30 30 35 30 30 30 30 35 [310] [310] [200] [205] [170] [205] [205] [240] [205] [205] [205] [205] [240]

TABLE 5 PIPE AND FILLER METAL SPECIFICATION
Pipe
Grade
TP304 TP304L TP304N TP304LN TP304H TP309Cb TP309S TP310Cb TP310S TP316 TP316L TP316N TP316LN TP316H TP321 TP347 TP348 TPXM-19 TPXM-29 ... ... ...

Filler Metal
UNS Designation
S30400 S30403 S30451 S30453 S30409 S30940 S30908 S31040 S31008 S31272 S31600 S31603 S31651 S31653 S31609 S32100 S34700 S34800 S22100 S28300 N08367 S20400 N08926

AWS A5.9 Class
ER308 ER308L ER308 ER308L ER308 ... ... ... ... ... ER316 ER316L ER316 ER316L ER316H ER321 ER347 ER347 ER347 ER209 ER240 ... ER209 ...

UNS Designation
S30800, S30883, S30880, S30883, S30880, ... ... ... ... ... S31680, S31683, S31680, S31683, S31680, S32180, S34780, S34780, S34780, S20980, S23980, N06625 S20980, N06625 W30840 W30843 W30840 W30843 W30840 ... ... ... ... ... W31640 W31643 W31640 W31643 W31640 W32140 W34740 W34740 W34740 W32240 W32440 W32240

S31272 S31600 S31603 S31609 S31635 S31651 S31653 S31700 S31703 S31725 S31726 S32100:

75 [515] 75 [515] 70 [485] S32109: 75 [515] 75 70 80 109 73 115 75 75 75 75 75 70 94 [515] [480] [550] [750] [500] [795] [515] [515] [515] [515] [515] [485] [650]

30 [205] 30 [205] 25 [170] 30 [205] 30 25 32 62 27 60 30 30 30 30 30 25 39 [205] [170] [220] [430] [185] [415] [205] [205] [205] [205] [205] [170] [270]

S32615 S32654 S33228 S34565 S34700 S34709 S34751 S34800 S34809 S35045 S35315

511

SA-312 /SA-312M

2007 SECTION II, PART A

SUPPLEMENTARY REQUIREMENTS
One or more of the following supplementary requirements shall apply only when speci?ed in the purchase order. The purchaser may specify a different frequency of test or analysis than is provided in the supplementary requirement. Subject to agreement between the purchaser and manufacturer, retest and retreatment provisions of these supplementary requirements may also be modi?ed.

S1. Product Analysis S1.1 For all pipe NPS 5 and larger in nominal size there shall be one product analysis made of a representative sample from one piece for each ten lengths or fraction thereof from each heat of steel. S1.2 For pipe smaller than NPS 5 there shall be one product analysis made from ten lengths per heat of steel or from 10% of the number of lengths per heat of steel, whichever number is smaller. S1.3 Individual lengths failing to conform to the chemical requirements speci?ed in Section 7 shall be rejected.

of injurious laminations, cracks, and similar objectionable defects. If this supplementary requirement is speci?ed, the number of tests per pipe required shall also be speci?ed. If a specimen from any length shows objectionable defects, the length shall be rejected, subject to removal of the defective end and subsequent retests indicating the remainder of the length to be sound and reasonably uniform material.

S2. Transverse Tension Tests S2.1 There shall be one transverse tension test made from one end of 10% of the lengths furnished per heat of steel. This applies only to pipe NPS 8 and larger. S2.2 If a specimen from any length fails to conform to the tensile properties speci?ed that length shall be rejected.

S5. Radiographic Examination S5.1 The entire length of weld in each double welded pipe shall be radiographically examined, using X-radiation, in accordance with Paragraph UW-51 of Section VIII Division 1 of the ASME Boiler and Pressure Vessel Code. In addition to the marking required by Section 13 each pipe shall be marked “RT” after the speci?cation and grade. Requirements of S5 shall be required in the certi?cation.

S3. Flattening Test S3.1 The ?attening test of Speci?cation A 999 /A 999M shall be made on a specimen from one end or both ends of each pipe. Crop ends may be used. If this supplementary requirement is speci?ed, the number of tests per pipe shall also be speci?ed. If a specimen from any length fails because of lack of ductility prior to satisfactory completion of the ?rst step of the ?attening test requirement, that pipe shall be rejected subject to retreatment in accordance with Speci?cation A 999/A 999M and satisfactory retest. If a specimen from any length of pipe fails because of a lack of soundness that length shall be rejected, unless subsequent retesting indicates that the remaining length is sound. S4. Etching Tests S4.1 The steel shall be homogeneous as shown by etching tests conducted in accordance with the appropriate portions of Method E 381. Etching tests shall be made on a cross section from one end or both ends of each pipe and shall show sound and reasonably uniform material free
512

S6. Stabilizing Heat Treatment S6.1 Subsequent to the solution anneal required in 6.2, Grades TP309HCb, TP310HCb, TP321, TP321H, TP347, TP347H, TP348, and TP348H shall be given a stabilization heat treatment at a temperature lower than that used for the initial solution annealing heat treatment. The temperature of stabilization heat treatment shall be at a temperature as agreed upon between the purchaser and vendor.

S7. Intergranular Corrosion Test S7.1 When speci?ed, material shall pass intergranular corrosion tests conducted by the manufacturer in accordance with Practices A 262, Practice E.
NOTE S7.1 — Practice E requires testing on the sensitized condition for low carbon or stabilized grades, and on the as-shipped condition for other grades.

S7.2 A stabilization heat treatment in accordance with Supplementary Requirement S6 may be necessary and is permitted in order to meet this requirement for the grades containing titanium or columbium, particularly in their H versions.

2007 SECTION II, PART A

SA-312 /SA-312M

S8. Minimum Wall Pipe S8.1 When speci?ed by the purchaser, pipe shall be furnished on a minimum wall basis. The wall of such pipe shall not fall below the thickness speci?ed. In addition to the marking required by Section 17, the pipe shall be marked S8.

a boil. Boiling shall be maintained through the duration of the test. The time of testing shall be that which is required to remove 40 to 60% of the original base metal thickness (usually 2 h or less) If more than 60% of the base metal thickness remains, it is permitted to terminate the test after 24 h. S9.7 At the end of the test period, the samples shall be removed from the solution, rinsed with distilled water, and dried. S9.8 The thickness measurements as in S9.5 shall be repeated. The anvil shape of the micrometer used shall be suitable for measuring the minimum remaining thickness with an accuracy to at least 0.001 in. [0.025 mm]. S9.9 The corrosion ratio, R, shall be calculated as follows:
R p (Wo ? W) / (Bo ? B)

S9. Weld Decay Test S9.1 When speci?ed in the purchase order, one sample from each lot of pipe shall be subject to testing in a boiling solution of 50% reagent grade hydrochloric acid and 50% water. S9.2 The sample, of approximately 2 in. [50 mm] length, shall be prepared from a production length of pipe. Depending on the size of the pipe, it is permitted to section the sample longitudinally to allow it to ?t in the Erlenmeyer ?ask. As a minimum, the tested sample shall include the entire weld and adjacent area and the full length of base metal 180° across from the weld. All burrs and sharp edges shall be removed by light grinding. Dust and grease shall be removed by cleaning with soap and water or other suitable solvents. S9.3 The hydrochloric acid solution shall be prepared by slowly adding reagent grade (approximately 37%) hydrochloric acid to an equal volume of distilled water.
Warning — Protect eyes and use rubber gloves when handling acid. Mixing and testing shall be performed in a protective enclosure.

where: Wo W Bo B p p p p average weld-metal thickness before the test average weld-metal thickness after the test average base-metal thickness before the test, and average base-metal thickness after the test

S9.9.1 The corrosion ratio for HCW pipe shall be as speci?ed in 11.4. S9.9.2 The corrosion ratio shall be 1.25 or less, or as further restricted in the purchase order, when the weld decay test is speci?ed for welded (WLD) pipe.
R p (Wo ? W) / (Bo ? B)

S9.4 The test container shall be a 1-L Erlenmeyer ?ask equipped with ground-glass joints and an Ahline condenser. The volume of the solution shall be approximately 700 mL. S9.5 The thickness of the weld and the base metal 180° from the weld shall be measured near both ends of the sample. These measurements shall be made with a micrometer with an anvil shape suitable for measuring the thickness with an accuracy to at least 0.001 in. [0.025 mm]. S9.6 The sample sections, both weld and base metal, shall be immersed in the ?ask containing the solution. Boiling chips shall be added and the solution brought to

where: Wo W Bo B p p p p average weld-metal thickness before the test average weld-metal thickness after the test average base-metal thickness before the test, and average base-metal thickness after the test

S9.9.1 The corrosion ratio for HCW pipe shall be as speci?ed in 11.4. S9.9.2 The corrosion ratio shall be 1.25 or less, or as further restricted in the purchase order, when the weld decay test is speci?ed for welded (WLD) pipe.

--`,,,,,`,```,`,`,,```,,,``````,-`-`,,`,,`,`,,`---

513

SA-312 /SA-312M

2007 SECTION II, PART A

APPENDIX
(Nonmandatory Information)
X1. DIMENSIONS OF WELDED AND SEAMLESS STAINLESS STEEL PIPE X1.1 Table X1.1 is based on Table 1 of the American National Standard for stainless steel pipe (ANSI B36.19).

TABLE X1.1 DIMENSIONS OF WELDED AND SEAMLESS STAINLESS STEEL PIPE
Nominal Wall Thickness
Outside Diameter
in.
0.405 0.540 0.675 0.840 1.050 1.315 1.660 1.900 2.375 2.875 3.500 4.000 4.500 5.563 6.625 8.625 10.750 12.750 14.000 16.000 18.000 20.000 22.000 24.000 30.000

NPS Designator
?8 ?4 ?8 1 ?2 3 ?4 1.0 1 1 ?4 11?2 2 21?2 3 31?2 4 5 6 8 10 12 14 16 18 20 22 24 30
1 3 1

Schedule 5SA
in.
... ... ... 0.065 0.065 0.065 0.065 0.065 0.065 0.083 0.083 0.083 0.083 0.109 0.109 0.109 0.134 0.156 0.156 0.165 0.165 0.188 0.188 0.218 0.250

Schedule 10SA
in.
0.049 0.065 0.065 0.083 0.083 0.109 0.109 0.109 0.109 0.120 0.120 0.120 0.120 0.134 0.134 0.148 0.165 0.180 0.188B 0.188B 0.188B 0.218B 0.218B 0.250 0.312

Schedule 40S
in.
0.068 0.088 0.091 0.109 0.113 0.133 0.140 0.145 0.154 0.203 0.216 0.226 0.237 0.258 0.280 0.322 0.365 0.375B ... ... ... ... ... ... ...

Schedule 80S
in.
0.095 0.119 0.126 0.147 0.154 0.179 0.191 0.200 0.218 0.276 0.300 0.318 0.337 0.375 0.432 0.500 0.500B 0.500B ... ... ... ... ... ... ...

mm
10.29 13.72 17.15 21.34 26.67 33.40 42.16 48.26 60.33 73.03 88.90 101.60 114.30 141.30 168.28 219.08 273.05 323.85 355.60 406.40 457.20 508.00 558.80 609.60 762.00

mm
... ... ... 1.65 1.65 1.65 1.65 1.65 1.65 2.11 2.11 2.11 2.11 2.77 2.77 2.77 3.40 3.96 3.96 4.19 4.19 4.78 4.78 5.54 6.35

mm
1.24 1.65 1.65 2.11 2.11 2.77 2.77 2.77 2.77 3.05 3.05 3.05 3.05 3.40 3.40 3.76 4.19 4.57 4.78B 4.78B 4.78B 5.54B 5.54B 6.35 7.92

mm
1.73 2.24 2.31 2.77 2.87 3.38 3.56 3.68 3.91 5.16 5.49 5.74 6.02 6.55 7.11 8.18 9.27 9.52B ... ... ... ... ... ... ...

mm
2.41 3.02 3.20 3.73 3.91 4.55 4.85 5.08 5.54 7.01 7.62 8.08 8.56 9.52 10.97 12.70 12.70B 12.70B ... ... ... ... ... ... ...

NOTE 1: The decimal thickness listed for the respective pipe sizes represents their nominal or average wall dimensions.
A Schedules 5S and 10S wall thicknesses do not permit threading in accordance with the American National Standard for Pipe Threads (ANSI B1.20.1). B These do not conform to the American National Standard for Welded and Seamless Wrought Steel Pipe (ANSI B36.10–1979).

514


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