Stainless Steel Pipes
Seamless Welded andHeavilyColdWorkedAustenitic StandardSpecificationfor
This standrd is isd under the fised desigation A312/A312M; the mmber immediately following the designatio indicates the yearof original adoption or in the case of revision the year of last revisin. A number in parentheses indicates the year of last reapproval. A supeript psi () indates an eiial chage sine the lat revisi o rearal.
This sfn h b rd fr sr h ecis of Dprt f D.
1. Scope*
These dimensions are also applicable to heavily cold workedpipe. Pipe having other dimensions is permitted to be orderedand furnished provided such pipe plies with all other requirements of this specification.
1.1 This specification² covers seamless straight-seamsteel pipe intended for high-temperature and general corrosive welded and heavily cold worked welded austenitic stainless service.
ments for pipe manufactured by the seamless process in 1.5 Grades TP321 and TP321H have lower strength require-nominal wall thicknesses greater than 3% in. [9.5 mm].
would be 15 flbf [20 J] energy absoeption or 15 mils [0.38 mm] lateral s amdm 3g o 1 u1 3oexpunsion some of the austenitic stainless steel grades covered by this specification are accepted by certain pressure vessel or piping codeswithout the necessity of making the actual test. For example Grades TP304 TP304L and TP347 are accepted by the ASME Pressure VesselCode Section VII Division 1 and by the Chemical Plant and Refinery Piping Code ANSI B31.3 for service at temperatures as low as 425 °Fgrades are usually accepled fer service temperatures as low as 325 °F [200 °C] without impact testing. Impuct testing may under certain [250 °C] without qualification by impact tests. Other AISI stainless steelcircumstances be required. For example materials with chromium or nickel content outside the AISI ranges and for material with carbonof ASME Section VII Division’1 when service temperatures are lower content exceeding 0.10 % are required to be impact tested under the ruls[. s] 0s um
are to be regarded separately as standard. Within the text the 1.6 The values stated in cither SI units or inch-pound unitsSI units are shown in brackets. The values stated in eachshall be used independently of the other. Combining values system may not be exact equivalents; therefore each systemfrom the two systems may result in non-conformance with the standard. The inch-pound units shall apply unless the “M"designation of this specification is specified in the order.
been substituted in this standard for such tradlitional terms as “nominal NorE 2The dimensionless designator NPS (nominal pipe size) hasdiameter ” “size ° and “nominal size.”
TP310HCb TP316H TP321H TP347H and TP348H are 1.2 Grades TP304H TP309H TP309HCb TP310H modifications of Grades TP304 TP309Cb TP309S TP310Cb TP310S TP316 TP321 TP347 and TP348 and are intendedfor service at temperatures where creep and stress rupture properties are important.
2. Referenced Documents
2.1 ASTM Standands:3
A262 Practices for Detecting Susceptibility to IntergranularA370 Test Methods and Definitions for Mechanical Testing Alttack in Austenitic Stainless SteelsA941 Terminology Relating to Steel Stainless Steel Related of Steel ProductsAlloys and FerroalloysA999/A999M Specification for General Requirements for Alloy and Stainless Steel PipeA1016/A1016M Specification for General Requirements for Ferritic Alloy Steel Austenitic Alloy Steel. and StainlessE112 Test Methods for Determining Average Grain Size Steel TubesE381 Methoxd of Macroetch Testing Steel Bars Billts Blooms and Forgings
1.3 Optional supplementary requirements are provided forpipe where a greater degree of testing is desired. These supplementary requirements call for additional tests to be madeand when desired it is permitted to specify in the order one ormore of these supplementary requirements.
1.4 Table X1.1 lists the standardized dimensions of weldedand seamless stainless steel pipe as shown in ANSI B36.19.
E527 Practice for Numbering Metals and Alloys in the
Unified Numbering System (UNS)2.2 ANSI Standords:^ B1.20.1 Pipe Threads General PurposeB36.10 Welded and Seamless Wrought Steel Pipe B36.19 Stainless Steel Pipe2.3 ASME Standard:2.4 AWS Standord: ASME Boiler and Pressure Vessel Code : Section VIIIA5.9 Corrosion-Resisting Chromium and Chromium-Nickel Steel Welding Rods and Electrodes2.5 Other Standard:SAE J1086 Practice for Numbering Metals and Alloys (UNS)
3. Terminology
3.1 Definitions:
Terminology A941 are applicable to this specification. 3.1.1 The definitions in Specification A999/A999M and
4. Ordering Information
4.1 Orders for material to this specification shall conform tothe requirements of the current edition of Specification A999/ A999M.
5. General Requirements
5.1 Material furmished under this specification shall con-form to the applicable requirements of the current edition ofSpecification A999/A999M unless otherwise provided herein.
5.2 Hear Trecrment:
dition in accordance with the requirements of Table 2. The 5.2.1 All pipe shall be furmished in the heattreated con-heattreatment procedure except for “H" grades S30815 and N08926 shall consist of heating the pipe to a minimum S31035 S31272 S31254 S32654 N08367 N08904 N08925 rapidly cooling by other means. 0 em Soubpe [.0t1] .001 o ae
6. Materials and Manufacture
6.1 Manufacture:
ing processes: 6.1.1 The pipe shall be manufactured by one of the follow-
does not involve welding at any stage of production. 6.1.2 Seamless (SML) pipe shall be made by a process that
6.1.3 Welded (WLD) pipe shall be made using an automaticwelding proces. welding process with no addition of filler metal during the
6.3 Grain Size:
7. Chemical Composition
8. Product Analysis
NPS DesignatorUnder 2 2 to 56 and over
6.1.4 Hecrvily cold-worked (HCW) pipe shall be made byapplying cold working of not less than 35 % reduction inthickness of both wall and weld to a welded pipe prior to the final anneal. No filler shall be used in making the weld. Priorinspected in accordance with the requirements of ASME Boiler to cold working the weld shall be 100 % radiographicallyrevision Paragraph UW-51. and Pressure Vessel Code Section VIII Division 1 latest
6.1.5 Welded pipe and HCW pipe of NPS 14 and smallershall have a single longitudinal weld. Welded pipe and HCW pipe of a size larger than NPS 14 shall have a singlelongitudinal weld or shall be produced by forming and welding two longitudinal sections of flat stock when approved by thepurchaser. All weld tests examinations inspections or treat-ments shall be performed on each weld seam.
6.1.6 At the option of the manufacturer pipe shall be eitherhot finished or cold finished.
6.1.7 The pipe shall be free of scale and contaminatingexogenous iron particles. Pickling blasting or surface finish-ing is not mandatory when pipe is bright annealed. The purchaser is permitted to require that a passivating treatment beapplied to the finished pipe.
6.2 Heat TreazmenrAll pipe shall be fumished in theheat-treated condition in accordance with the requirements ofing hot forming while the temperature of the pipes is not less Table 2. Altermatively for seamless pipe immediately follow-than the minimum solution treatment temperature specified in Table 2 pipes shall be individually quenched in water orrapidly cooled by other means (direct quenched).
6.3.1 The grain size of Grade UNS S32615 as determinedin accordance with Test Methods E112 shall be No. 3 or finer.
TP310H and TP310HCb as determined in accordance with 6.3.2 The grain size of grades TP309H TP309HCb Test Methods E112 shall be No. 6 or coarser.
S31035 and 348H as determined in accordance with Test 6.3.3 The grain size of grades 304H 316H 321H 347H Methods E112 shall be No. 7 or coarser.
6.3.4 The grain size of Grades N08810 and N08811 asNo. 5 or coarser. determined in accordance with Test Methods E112 shall be
7.1 The steel shall conform to the requirements as tochemical position prescribed in Table 1.
8.1 At the request of the purchaser an analysis of one billetor one length of flat-rolled stock from each heat or two pipes from each lot shall be made by the manufacturer. A lot of pipeshall consist of the following number of lengths of the sames jo jq so ss e ais
TABLE 1 Chemical Requirements
UNS Composition %Grade Desig nation^ Manga nese phorus Phos- Sufur Sslicon Chrom- ium Nickel denum Molyb- nium Colum bium um Niro gen° Vana- dium Copper Cerlum Boron Alum- inum OtherS20400 0.030 7.0 0.045 0.030 1.00 15.0 1.50 max 0.15 ..-61-WXd1 S20910 0.06 9.0 4.0- 6.0 0.045 0.030 1.00 20.5- 17.0 235 3.00 11.5- 13.5 1.50 3.00 0.10 0.30 0.20 0.30 0.40 -01'0 0.30 ..TPXM-10 S21900 0.08 8.0- 10.0 0.045 0.030 1.00 19.0 215 5.5 7.5 ... ... 0.15 0.40 ... ...L1-WXd1 S21904 0.04 8.0- 10.0 0.045 0.030 1.00 19.0 215 5.5 7.5 0.15 0.40 ... ... ...TP201 62-WX1 S24000 S20100 0.08 0.15 11.5- 75 14.5 0.060 0.060 0.030 0.030 1.00 1.00 17.0- 19.0 16.0 2.3- 3.5- 3.7 ... 0.20 0.40 ... ... ...TP201LN S20153 0.03 6.4- 0.045 0.015 0.75 18.0 16.0- 4.0- 5.5 -.. ... 0.10 ... 1.00 ... ... ... ... ... ..TP304 S30400 0.08 7.5 2.00 0.045 0.030 1.00 17.5 18.0- 8.0- 5.0 ... 0.25 ... ...TP304L S30403 0.035 2.00 0.045 0.030 1.00 18.0 20.0 20.0 13.0 11.0 8.0 ... ... ... ...TP304H S30409 0.04 0.10 2.00 0.045 0.030 1.00 18.0- 20.0 8.0- 11.0 ... .. ...... S30415 0.04- 0.06 0.80 0.045 0.030 1.00 2.00 18.0- 19.0 9.0- 10.0 0.12 0.18 0.03 0.08TP304N TP304LN S30453 S30451 0.035 0.08 2.00 2.00 0.045 0.045 0.030 0.030 1.00 1.00 200 18.0- 18.0 18.0 8.0 8.0 = ... ... 0.10 0.10 0.16 ... ...S30600 0.018 2.00 0.02 0.02 3.7 17.0- 20.0 14.0 12.0 0.20 ... 0.16 ... ... ... 0.50... S30615 0.16- 2.00 0.030 0.03 3.2 4.3 17.0- 185 13.5 15.5 ..- ... max ..- -.. ... 0.80S30815 0.05 0.24 0.10 0.80 0.040 0.030 1.40 2.00 4.0 20.0 19.5 22.0 10.0 16.0 12.0 - 0.14 00 ..- 0.03 0.08 1.50TP309S S30908 0.08 2.00 0.045 0.030 1.00 22.0 24.0 12.0 15.0 0.75 ... ... ...TP309H S30940 S30909 0.04 0.10 2.00 0.045 0.030 1.00 22.0 24.0 12.0 15.0 ..- -.. ... ... ..-TP309Cb 0.08 2.00 0.045 0.030 1.00 22.0 24.0 12.0 16.0 0.75 1.10 max 10 × C min. ... ...TP309HCb S30941 0.04 0.10 2.00 0.045 0.030 1.00 22.0 24.0 12.0 16.0 0.75 10×C min， ... ...S31002 0.015 2.00 0.020 0.015 0.15 24.0 26.0 19.0 22.0 0.10 1.10 max ... 0.10 ..-TP310S S31008 0.08 2.00 0.045 0.030 1.00 24.0- 26.0 19.0 22.0 0.75 ..-TP310H S31009 0.04 0.10 2.00 0.045 0.030 1.00 26.0 24.0 19.0 22.0 0.15-S31035 0.04 0.10 0.60 0.030 0.015 0.40 21.5- 23.5 23.5 26.5 0.30 0.60 0.30 2.0 3.5 0.002 0.008 Co 1.0 W 2.0 4.02.0
A312/A312M-12
TABLE 1 Continued
Composifion %
Grade Desig UNS Mang8 Phos- Chrom- Molyb- L Colum Tanta- Niro- Vana- Copper Alum-S31040 nationd uoqyeg nese phorus Sufur Silicon ium Nickel denum nium blum lum m8x gen dum Cerlum Boron inum OtherTP310Cb 0.08 2.00 0.045 0.030 1.00 24.0 26.0 19.0 22.0 0.75 1.10 max 10 × C min.TP310HCb S31041 0.04 0.10 2.00 0.045 0.030 1.00 24.0 26.0 19.0 22.0 0.75 10× C min.S31050 0.025 2.00 0.020 0.015 0.4 24.0 20.5 1.6 1.10 max 0.09 0.15... S31254 0.020 1.00 0.030 0.010 0.80 19.5- 20.5 26.0 23.5 17.5 18.5 2.6 6.0 6.5 ..- 0.1B- 0.22 ... 0.50 1.00 -..S31272 0.08 012 2.00 1.5- 0.030 0.015 0.25 0.75 14.0- 16.0 14.0 16.0 1.00 1.40 0.30 0.60 0.004 0.008TP316 S31600 S31277 0.020 0.08 3.00 2.00 0.030 0.045 0.010 0.030 0.50 1.00 20.5 16.0 23.0 26.0 11.0- 28.0 2.00 6.5 8.0 0.30 0.40 0.50 1.50TP316L S31603 0.035D 2.00 0.045 0.030 1.00 18.0 16.0 14.0 10.0 3.00 2.00 ..- -.. ... ..- ... ... ...TP316H S31609 0.04 2.00 0.045 0.030 1.00 16.0 18.0 11.0 14.0 2.00 3.00 .- ... ...TP316T S31635 0.10 0.08 2.00 0.045 0.030 0.75 18.0 16.0 18.0 14.0 10.0 14.0 3.00 2.00 3.00 (CN) 5× 0.10 ...TP316N S31651 0.08 2.00 0.045 0.030 1.00 16.0 11.0- 2.00 0.70 0.10TP316LN S31653 0.035 2.00 0.045 0.030 1.00 16.0- 18.0 14.0 11.0- 3.00 2.00 ... .. 0.10 0.16 ... ... ...TP317 S31700 0.08 2.00 0.045 0.030 1.00 18.0 18.0 20.0 14.0 11.0- 14.0 3.00 3.0- 4.0 ..- 0.16 ... ... ... ..TP317L S31703 0.035 2.00 0.045 0.030 1.00 18.0 20.0 11.0 15.0 3.0 4.0 ...... S31725 0.03 2.00 0.040" 0.030 1.00 18.0 20.0 13.5 17.5 4.0 5.0 0.10 ... 0.75 ...S31726 S31727 0.03 0.03 2.00 1.00 0.040 0.030 0.030 0.030 1.00 1.00 17.5. 17.0 20.0 14.5- 14.5 17.5 4.0 5.0 3.8 0.15 0.10 0.20 0.75 2.8... S32053 0.03 1.00 0.030 0.010 1.00 22.0 19.0 24.0 16.5 5.0 4.5 0.17- 0.21 ... 4.0 ... ... ...TP321 S32100 0.08 2.00 0.045 0.030 1.00 24.0 17.0 26.0 9.0 6.0 G 0.22 0.10TP321H S32109 0.04 0.10 2.00 0.045 0.030 1.00 17.0- 19.0 19.0 12.0 9.0 12.0 0.10... S32615 0.07 2.00 0.045 0.030 4.8 6.0 16.5- 19.5 19.0 22.0 0.30 1.50 ..- .. ... ... 1.50 2.50 ...S33228 S32654 0.020 2.0 4.0 0.030 0.005 0.50 24.0 25.0 21.0 23.0 7.0 8.0 0.45 0.56 0.30 0.60... S34565 0.04 0.08 0.03 1.00 5.0 0.020 0.030 0.015 0.010 0.30 1.00 26.0 23.0 28.0 31.0 33.0 16.0 4.0 0.60 1.00 0.10 0.40 ... ... ..- 0.05 0.10 ... ... 0.025TP347 ... S34700 0.08 2.00 7.0 0.045 0.030 1.00 17.0- 25.0 18.0 9.0- 5.0 ... .. 0.60 ... ..- ... -..TP347H S34709 0.04- 2.00 0.045 0.030 1.00 17.0- 19.0 13.0 9.0- ... ..0.10 19.0 13.0
A312/A312M-12
Ceiga b AM (ra l; T :2:TEST 202catiasther sjler (TAYLoRDosijpo pura Donskadedprineud by
TABLE 1Continued
UNS Composition %Grade Desig nation^ uoqeg Manga eseu phorus Phos- Suffur Slicon Chrom- ium Nickel Molyb- denum nium -e Colum bium lum Niro- Vana- dum Copper Cerlum Boron Aum- inum OtherS34751 0.005 2.00 0.045 0.030 1.00 17.0 9.0 0.50 0.20 max 0.06 ... -... ...TP348 S34800 0.020 0.08 2.00 0.045 0.030 1.00 17.0 19.0 19.0 13.0 9.0 13.0 .- 0.10 0.10 ... .. ...TP348H 60829 0.04 0.10 2.00 0.045 0.030 1.00 17.0 19.0 9.0 13.0 0.10 ..- ... ..S35045 S35315 0.06 0.10 0.04 2.00 1.50 0.040 0.015 0.030 1.20 1.00 25.0 24.0 29.0 32.0 37.0 0.15 0.60 ..- 0.12 ... ..- 0.75 0.03 ... 0.15 0.60TPXM-15 .. S38100 0.08 0.08 2.00 0.030 0.030 1.50 2.00 17.0 26.0 34.0 17.5- 36.0 ..- -.. 0.18 ... ..- ... 0.08 ... ...... S38815 0.030 2.00 0.040 0.020 2.50 5.5 13.0 19.0 15.0 18.5 0.75 ... ... ... 0.75- ... ... ... 0.30... N08367 0.030 2.00 0.040 0.030 1.00 6.5 20.0 22.0 15.0 23.5- 17.0 25.5 1.50 6.0 7.0 0.18 0.25 ... 1.50 ...800 N08800 0.10 1.50 0.045 0.015 1.00 19.0 23.0 30.0 35.0 ... .- ... 0.75 ... ... 0.15 0.60 39.5 min. Fe800H N08810 0.05- 0.10 1.50 0.045 0.015 1.00 19.0- 23.0 30.0 35.0 0.15 0.60 ... ... ... .. ... 0.15- 0.60 39.5 min. FelN08811 N08904 0.06 0.10 0.020 1.50 2.00 0.045 0.040 0.015 0.030 1.00 1.00 19.0 19.0 23.0 30.0 23.0 35.0 4.0- 0.60 0.15 0.10 ... 1.00 0.75 ... 0.60** 0.15- 39.5 min. FeN08925 0.020 1.00 0.045 0.030 0.50 19.0 23.0 24.0- 28.0 6.0 5.0 ... ... 0.10 0.80 2.00 ... ... ... ...N08926 0.020 2.00 0.030 0.010 0.50 21.0 19.0 24.0 26.0 7.0 6.0 0.15 0.20 0.50 1.5021.0 26.0 7.0 0.25 1.50
New designation established in acordance with Practice E527 and SAE J108S.Themdfanyisrtrhmaeragrnt bnhurhaerandmact Mximrles se ined Where es pr th taeeuirend anlysis f t lnt eed nbe tmnd oped For smal dameter rtin walls orboth where many drawing passes are required a cabn maimum f 0.040 % s necessary in gades TP304L and TP16L Small outside melertubes are dfined as hose lesshan 0.00n[12.7mminutsiedternd wltbs as thlsan0.09 in[120 mm in arelltess 0.044in [1.10 m] inminmm wlthcke) For welded TP316 TP316N TP316LN and TP316H ppe he nikel range shallbe 10.014.0 %FForwelded pipe.the phosphonusmaximum shallbe 0.045 %
