1、Designation: A790/A790M 12A790/A790M 13Standard Specification forSeamless and Welded Ferritic/Austenitic Stainless SteelPipe1This standard is issued under the fixed designation A790/A790M; the number immediately following the designation indicates the yearof original adoption or, in the case of revi
2、sion, the year of last revision. A number in parentheses indicates the year of last reapproval.A superscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope*1.1 This specification2 covers seamless and straight-seam welded ferritic/austenitic steel pipe intende
3、d for general corrosiveservice, with particular emphasis on resistance to stress corrosion cracking. These steels are susceptible to embrittlement if usedfor prolonged periods at elevated temperatures.1.2 Optional supplementary requirements are provided for pipe when a greater degree of testing is d
4、esired.These supplementaryrequirements call for additional tests to be made and, when desired, one or more of these may be specified in the order.1.3 Appendix X1 of this specification lists the dimensions of welded and seamless stainless steel pipe as shown inANSI B36.19.Pipe having other dimensions
5、 may be furnished provided such pipe complies with all other requirements of this specification.1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI unitsare shown in brackets. The values stated in each system may not be exac
6、t equivalents; therefore, each system shall be usedindependently of the other. Combining values from the two systems may result in non-conformance with the standard. Theinch-pound units shall apply unless the M designation of this specification is specified in the order.NOTE 1The dimensionless desig
7、nator NPS (nominal pipe size) has been substituted in this standard for such traditional terms as nominal diameter,size, and nominal size.2. Referenced Documents2.1 ASTM Standards:3A370 Test Methods and Definitions for Mechanical Testing of Steel ProductsA923 Test Methods for Detecting Detrimental I
8、ntermetallic Phase in Duplex Austenitic/Ferritic Stainless SteelsA941 Terminology Relating to Steel, Stainless Steel, Related Alloys, and FerroalloysA999/A999M Specification for General Requirements for Alloy and Stainless Steel PipeE213 Practice for Ultrasonic Testing of Metal Pipe and TubingE309 P
9、ractice for Eddy-Current Examination of Steel Tubular Products Using Magnetic SaturationE381 Method of Macroetch Testing Steel Bars, Billets, Blooms, and ForgingsE426 Practice for Electromagnetic (Eddy-Current) Examination of Seamless and Welded Tubular Products, Titanium,AusteniticStainless Steel a
10、nd Similar AlloysE527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)2.2 ANSI Standards:4B1.20.1 Pipe Threads, General PurposeB36.10 Welded and Seamless Wrought Steel PipeB36.19 Stainless Steel Pipe2.3 SAE Standard:5SAE J 10861 This specification is under the jurisdict
11、ion ofASTM Committee A01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee A01.10on Stainless and Alloy Steel Tubular Products.Current edition approved Sept. 1, 2012April 1, 2013. Published December 2012May 2013. Originally approved in 1981. Last previous e
12、dition approved in 20112012 asA790/A790M11.12. DOI: 10.1520/A0790_A0790M-12. 10.1520/A0790_A0790M-13.2 For ASME Boiler and Pressure Vessel Code applications see related Specification SA790 in Section II of that Code.3 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM
13、Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.4 Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http:/www.ansi.org.5 Available from
14、 Society of Automotive Engineers (SAE), 400 Commonwealth Dr., Warrendale, PA 15096-0001, http:/www.sae.org.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be tec
15、hnically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of thi
16、s standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States12.4 Other Standard:6SNT-TC-1A Personal Qualification and Certification in Nondestructive Testing2.5 AWS StandardA5.9 Corrosion-Resisting Chromium and Chromium-Nickel Steel Weld
17、ing Rods and Electrodes3. Terminology3.1 DefinitionsFor definitions of terms used in this specification refer to Terminology A941.4. Ordering Information4.1 Orders for material under this specification should include the following, as required, to describe the desired materialadequately:4.1.1 Quanti
18、ty (feet, metres, or number of lengths),4.1.2 Name of material (ferritic/austenitic steel pipe),4.1.3 Process (seamless or welded),4.1.4 Grade (see Table 1),4.1.5 Size (NPS designator or outside diameter and schedule number of average wall thickness),4.1.6 Length (specific or random) (see Section 11
19、),4.1.7 End finish (section on ends of Specification A999/A999M),4.1.8 Optional requirements (product analysis, Section 9; hydrostatic test or nondestructive electric test, Section 14),4.1.9 Test report required (section on certification of Specification A999/A999M),4.1.10 Specification designation,
20、 and4.1.11 Special requirements and any supplementary requirements selected.5. General Requirements5.1 Material furnished under this specification shall conform to the applicable requirements of the current edition ofSpecification A999/A999M unless otherwise provided herein.6. Materials and Manufact
21、ure6.1 Manufacture:6.1.1 The pipe shall be made by the seamless or an automatic welding process, with no addition of filler metal in the weldingoperation.6.1.2 At the manufacturers option, pipe may be either hot-finished or cold-finished.6.1.3 The pipe shall be pickled free of scale. When bright ann
22、ealing is used, pickling is not necessary.6.2 DiscardAsufficient discard shall be made from each ingot to secure freedom from injurious piping and undue segregation.6.3 Unless otherwise stated in the order, all pipe shall be furnished in the heat-treated condition as shown in Table 1.6.3.1 For seaml
23、ess pipe, as an alternate to final heat treatment in a continuous furnace or batch-type furnace, immediatelyfollowing hot forming while the temperature of the pipes is not less than the specified minimum solution treatment temperature,pipes shall be individually quenched in water or rapidly cooled b
24、y other means, except for UNS S32950, which shall be air cooled.6.3.2 If the purchaser desires pipe without heat treatment subsequent to welding, the purchase order shall specify the followingcondition:6.3.2.1 No final heat treatment of pipe fabricated from plate that has been heat treated as requir
25、ed by Table 1 for the particulargrade is required, provided a sample of that heat of finished pipe or material representative of that heat of pipe as a prolongationof the weld passes the Test Methods A923 Method B or C (See Note 2), including base metal, weld metal, and heat affected zoneper heat. E
26、ach pipe supplied under this requirement shall be stenciled with the suffix “HT-O.”6.3.2.2 For materials not listed in Table 3 of Test Methods A923, the HT-O provision does not apply.NOTE 2The Test Methods A923 test method (B or C) is at the manufacturers option, unless otherwise specified by the pu
27、rchaser.7. Chemical Composition7.1 The steel shall conform to the chemical requirements as prescribed in Table 2.8. Heat Analysis8.1 An analysis of each heat of steel shall be made by the steel manufacturer to determine the percentages of the elementsspecified.6 Available from American Society for N
28、ondestructive Testing (ASNT), P.O. Box 28518, 1711 Arlingate Ln., Columbus, OH 43228-0518, http:/www.asnt.org.A790/A790M 1329. Product Analysis9.1 At the request of the purchasers inspector, an analysis of one billet or one length of flat-rolled stock from each heat, or twopipes from each lot, shall
29、 be made by the manufacturer. A lot of pipe shall consist of the following number of lengths of the samesize and wall thickness from any one heat of steel:NPS Designator Lengths of Pipe in LotUnder 2 400 or fraction thereof2 to 5, incl 200 or fraction thereof6 and over 100 or fraction thereof9.2 The
30、 results of these analyses shall be reported to the purchaser or the purchasers representative and shall conform to therequirements specified in Section 7.9.3 If the analysis of one of the tests specified in 8.1 or 9.1 does not conform to the requirements specified in Section 7, ananalysis of each b
31、illet or pipe from the same heat or lot may be made, and all billets or pipe conforming to the requirements shallbe accepted.TABLE 1 Heat TreatmentUNSDesignation TypeA Temperature F C QuenchS31200 1920201010501100Rapid cooling in waterS31260 1870201010201100Rapid cooling in air or waterS31500 180019
32、009801040Rapid cooling in air or waterS31803 1870201010201100Rapid cooling in air or waterS32003 1850205010101120Rapid cooling in air or waterS32101 1870 1020 Quenched in water or rapidlycooled by other meansS32202 1870197510201080Rapid cooling in air or waterS32205 2205 1870201010201100Rapid coolin
33、g in air or waterS32304 2304 170019209251050Rapid cooling in air or waterS32506 1870205010201120Rapid cooling in air or waterS32520 1975205010801120Rapid cooling in air or waterS32550 255 1900 1040 min Rapid cooling in air or waterS32707 1975205010801120Rapid cooling in air or waterS32750 2507 18802
34、06010251125Rapid cooling in air or waterS32760 1960208510701140Rapid cooling in air or waterS32808 1920210010501150Rapid cooling in air or waterS32900 329 17001750925955Rapid cooling in air or waterS32906 1870210010201150Rapid cooling in air or waterS32950 182018809901025Air coolS33207 1905208510401
35、140Rapid cooling in water or byother meansS39274 1920206010251125Rapid cooling in air or waterS39277 1975215510801180Rapid cooling in air or waterS81921 176020109601100Rapid cooling in air or waterS82011 1850205010101120Rapid cooling in air or waterS82441 1870 1020 Rapid cooling in air or waterAComm
36、on name, not a trademark, widely used, not associated with any oneproducer. 329 is na AISI number.A790/A790M 133TABLE 2 Chemical RequirementsAUNSDesigna-tionBTypeC C Mn P S Si Ni Cr Mo N Cu OthersS31200 0.030 2.00 0.045 0.030 1.00 5.56.5 24.026.0 1.202.00 0.140.20 . . . . . .S31260 0.030 1.00 0.030
37、0.030 0.75 5.57.5 24.026.0 2.53.5 0.100.30 0.200.80 W0.100.50S31500 0.030 1.202.00 0.030 0.030 1.402.00 4.25.2 18.019.0 2.503.00 0.050.10 . . . . . .S31803 0.030 2.00 0.030 0.020 1.00 4.56.5 21.023.0 2.53.5 0.080.20 . . . . . .S32003 0.030 2.00 0.030 0.020 1.00 3.04.0 19.5-22.5 1.502.00 0.140.20 . .
38、 . . . .S32101 0.040 4.06.0 0.040 0.030 1.00 1.351.70 21.022.0 0.100.80 0.200.25 0.100.80 . . .S32202 0.030 2.00 0.040 0.010 1.00 1.002.80 21.524.0 0.45 0.180.26 . . . . . .S32205 2205 0.030 2.00 0.030 0.020 1.00 4.56.5 22.023.0 3.03.5 0.140.20 . . . . . .S32304 2304 0.030 2.50 0.040 0.040 1.00 3.05
39、.5 21.524.5 0.050.60 0.050.20 0.050.60 . . .S32506 0.030 1.00 0.040 0.015 0.90 5.57.2 24.026.0 3.03.5 0.080.20 . . . W0.050.30S32520 0.030 1.5 0.035 0.020 0.80 5.58.0 24.026.0 3.05.0 0.200.35 0.53.00 . . .S32550 255 0.04 1.50 0.040 0.030 1.00 4.56.5 24.027.0 2.93.9 0.100.25 1.502.50 . . .S32707 0.03
40、0 1.50 0.035 0.010 0.50 5.59.5 26.029.0 4.05.0 0.300.50 1.0 Co0.52.0S32750 2507 0.030 1.20 0.035 0.020 0.80 6.08.0 24.026.0 3.05.0 0.240.32 0.5 . . .S32760 0.05 1.00 0.030 0.010 1.00 6.08.0 24.026.0 3.04.0 0.200.30 0.501.00 W0.501.0040 minDS32808 0.030 1.10 0.030 0.010 0.50 7.08.2 27.027.9 0.801.20
41、0.300.40 . . . W2.102.50S32900 329 0.08 1.00 0.040 0.030 0.75 2.55.0 23.028.0 1.002.00 . . . . . . . . .S32906 0.030 0.801.50 0.030 0.030 0.80 5.87.5 28.030.0 1.502.60 0.300.40 0.80 . . .S32950 0.030 2.00 0.035 0.010 0.60 3.55.2 26.029.0 1.002.50 0.150.35 . . . . . .S33207 0.030 1.50 0.035 0.010 0.8
42、0 6.09.0 29.033.0 3.05.0 0.400.60 1.0S39274 0.030 1.00 0.030 0.020 0.80 6.08.0 24.026.0 2.53.5 0.240.32 0.200.80 W1.502.50S39277 0.025 0.80 0.025 0.002 0.80 6.58.0 24.026.0 3.04.0 0.230.33 1.202.00 W0.81.2S81921 0.030 2.004.00 0.040 0.030 1.00 2.004.00 19.022.0 1.002.00 0.140.20 . . . . . .S82011 0.
43、030 2.03.0 0.040 0.020 1.00 1.002.00 20.523.5 0.101.00 0.150.27 0.50 . . .S82441 0.030 2.54.0 0.035 0.005 0.70 3.04.5 23.025.0 1.002.00 0.200.30 0.100.80TABLE 2 Chemical RequirementsAUNSDesigna-tionBTypeC C Mn P S Si Ni Cr Mo N Cu OthersS31200 0.030 2.00 0.045 0.030 1.00 5.56.5 24.026.0 1.202.00 0.1
44、40.20 . . . . . .S31260 0.030 1.00 0.030 0.030 0.75 5.57.5 24.026.0 2.53.5 0.100.30 0.200.80 W0.100.50S31500 0.030 1.202.00 0.030 0.030 1.402.00 4.25.2 18.019.0 2.503.00 0.050.10 . . . . . .S31803 0.030 2.00 0.030 0.020 1.00 4.56.5 21.023.0 2.53.5 0.080.20 . . . . . .S32003 0.030 2.00 0.030 0.020 1.
45、00 3.04.0 19.5-22.5 1.502.00 0.140.20 . . . . . .S32101 0.040 4.06.0 0.040 0.030 1.00 1.351.70 21.022.0 0.100.80 0.200.25 0.100.80 . . .S32202 0.030 2.00 0.040 0.010 1.00 1.002.80 21.524.0 0.45 0.180.26 . . . . . .S32205 2205 0.030 2.00 0.030 0.020 1.00 4.56.5 22.023.0 3.03.5 0.140.20 . . . . . .S32
46、304 2304 0.030 2.50 0.040 0.040 1.00 3.05.5 21.524.5 0.050.60 0.050.20 0.050.60 . . .S32506 0.030 1.00 0.040 0.015 0.90 5.57.2 24.026.0 3.03.5 0.080.20 . . . W0.050.30S32520 0.030 1.5 0.035 0.020 0.80 5.58.0 24.026.0 3.05.0 0.200.35 0.53.00 . . .S32550 255 0.04 1.50 0.040 0.030 1.00 4.56.5 24.027.0
47、2.93.9 0.100.25 1.502.50 . . .S32707 0.030 1.50 0.035 0.010 0.50 5.59.5 26.029.0 4.05.0 0.300.50 1.0 Co0.52.0S32750D 2507 0.030 1.20 0.035 0.020 0.80 6.08.0 24.026.0 3.05.0 0.240.32 0.5 . . .S32760E 0.05 1.00 0.030 0.010 1.00 6.08.0 24.026.0 3.04.0 0.200.30 0.501.00 W0.501.00S32808 0.030 1.10 0.030
48、0.010 0.50 7.08.2 27.027.9 0.801.20 0.300.40 . . . W2.102.50S32900 329 0.08 1.00 0.040 0.030 0.75 2.55.0 23.028.0 1.002.00 . . . . . . . . .S32906 0.030 0.801.50 0.030 0.030 0.80 5.87.5 28.030.0 1.502.60 0.300.40 0.80 . . .S32950 0.030 2.00 0.035 0.010 0.60 3.55.2 26.029.0 1.002.50 0.150.35 . . . . . .S33207 0.030 1.50 0.035 0.010 0.80 6.09.0 29.033.0 3.05.0 0.400.60 1.0S39274 0.030 1.00 0.030 0.020 0.80 6.08.0 24.026.0 2.53.5 0.240.32 0.200.80 W1.502.50A790/A790M 13410. Tensile and Hardness Properties10.1 The material shall conform to the tensile
