1、Designation: A376/A376M 14 Used in USDOE-NE standardsStandard Specification forSeamless Austenitic Steel Pipe for High-TemperatureService1This standard is issued under the fixed designation A376/A376M; the number immediately following the designation indicates the yearof original adoption or, in the
2、 case of revision, 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 specification2covers seamless austenitic steel pipeintended for high-temperature
3、service. Among the gradescovered are H grades and nitrogen grades that are specificallyintended for high-temperature service.NOTE 1This specification was originally developed for use for pipingin the central stations of electric-power generating thermal plants.However, its use is not restricted to s
4、uch applications and it may be usedin other applications for which the attributes of the materials, as defined bythis specification, are appropriate.1.2 Optional supplementary requirements (S1 through S10)are provided. These supplementary requirements specify addi-tional tests that will be made only
5、 when stated in the order,together with the number of such tests required.1.3 Grades TP321 and TP321H have lower strength require-ments for nominal wall thicknesses greater than38 in. 9.5mm.1.4 The values stated in either inch-pound units or SI unitsare to be regarded separately as standard. Within
6、the text, theSI units are shown in brackets. The values stated in eachsystem may not be exact equivalents; therefore, each systemshall be used independently of the other. Combining valuesfrom the two systems may result in non-conformance with thestandard. The inch-pound units shall apply unless the
7、“M”designation of this specification is specified in the order.NOTE 2The dimensionless designators NPS (nominal pipe size) andDN (Diametre Nominel) have been substituted in this standard for suchtraditional terms as “nominal diameter,” “size,” and “nominal size.”2. Referenced Documents2.1 ASTM Stand
8、ards:3A262 Practices for Detecting Susceptibility to IntergranularAttack in Austenitic Stainless SteelsA999/A999M Specification for General Requirements forAlloy and Stainless Steel PipeE112 Test Methods for Determining Average Grain SizeE213 Practice for Ultrasonic Testing of Metal Pipe andTubingE3
9、81 Method of Macroetch Testing Steel Bars, Billets,Blooms, and ForgingsE426 Practice for Electromagnetic (Eddy-Current) Examina-tion of Seamless and Welded Tubular Products, Titanium,Austenitic Stainless Steel and Similar Alloys2.2 Other Standards:SNT-TC-1A Personnel Qualification and Certification
10、inNondestructive Testing43. Ordering Information3.1 Orders for material to this specification should includethe following, as required to describe the desired materialadequately:3.1.1 Quantity (feet, centimetres, or number of lengths),3.1.2 Name of material (seamless austenitic steel pipe),3.1.3 Gra
11、de (Table 1),3.1.4 Size (nominal size, or outside diameter and schedulenumber or average wall thickness),3.1.5 Lengths (specific or random), (Permissible Variationsin Length Section of Specification A999/A999M),3.1.6 End finish (Ends Section of Specification A999/A999M),3.1.7 Optional requirements (
12、Section 8) (see HydrostaticTest Requirements Section and the Permissible Variation inWeight for Seamless Pipe Section for weighing individuallengths, of Specification A999/A999M), (see 9.6, repairing bywelding; 13.3, die stamping),3.1.8 Test report required (Certification Section of Specifi-cation A
13、999/A999M),3.1.9 Specification designation, and3.1.10 Special requirements or any supplementary require-ments selected, or both.1This specification is under the jurisdiction of ASTM Committee A01 on Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.10 on St
14、ainless and Alloy Steel Tubular Products.Current edition approved Oct. 1, 2014. Published November 2014. Originallyapproved in 1954. Last previous edition approved in 2013 as A376/A376M13.DOI: 10.1520/A0376_A0376M-14.2For ASME Boiler and Pressure Vessel Code applications see related Specifi-cation S
15、A-376 in Section II of that Code.3For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.4Available fromAmerican Soci
16、ety for Nondestructive Testing (ASNT), P.O. Box28518, 1711 Arlingate Ln., Columbus, OH 43228-0518.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14. General Requirements
17、4.1 Material furnished to this specification shall conform tothe applicable requirements of the current edition of Specifi-cation A999/A999M unless otherwise provided herein.5. Materials and Manufacture5.1 ManufactureAt the manufacturers option, pipe maybe either hot finished or cold finished, with
18、a suitable finishingtreatment, where necessary.5.2 Heat Treatment:5.2.1 All pipe shall be furnished in the heat-treated condi-tion unless the order specifically states that no final heattreatment shall be applied. When the order is furnished withoutfinal heat treatment, each pipe shall be stenciled
19、“HT-O.”5.2.2 As an alternate to final heat treatment in a continuousfurnace or batch-type furnace, immediately following hotforming while the temperature of the pipes is not less than thespecified minimum solution treatment temperature, pipes maybe individually quenched in water or rapidly cooled by
20、 othermeans.5.2.3 Grades TP304, TP304N, TP304LN, TP316, TP316N,TP316LN, TP321, TP347, TP347LN, TP348, 16-8-2H,S 31725, and S 31726Unless otherwise stated in the order,heat treatment shall consist of heating to a minimum tempera-ture of 1900 F 1040 C and quenching in water or rapidlycooling by other
21、means.5.2.3.1 The purchaser may specify controlled structural orspecial service characteristics which shall be used as a guidefor the most suitable heat treatment. If the final heat treatmentis at a temperature under 1900 F 1040 C, each pipe shall bestenciled with the final heat treatment temperatur
22、e in degreesFahrenheit or Celsius after the suffix “HT.”5.2.4 Grades TP304H, TP316H, TP321H, TP347H,TP348H, and 16-8-2HIf cold working is involved inprocessing, the minimum solution-treating temperature forGrades TP321H, TP347H, and TP348H shall be 2000 F 1100C, for Grades TP304H and TP316H, 1900 F
23、1040 C, andfor Grade 16-8-2H, 1800 F 980 C. If the material ishot-rolled, the minimum solution-treating temperatures forGrades TP321H, TP347H, and TP348H shall be 1925 F 1050C, for Grades TP304H and TP316H, 1900 F 1040 C, andfor Grade 16-8-2H, 1800 F 980 C.5.2.5 Grade S34565Heat treatment shall cons
24、ist of heat-ing to a temperature in the range of 2050 F 1120 Cminimum and 2140 F 1170 C maximum, and quenching inwater or rapidly cooling by other means.5.2.6 Grade S31266Heat treatment shall consist of heat-ing to a temperature in the range of 2100 F 1150 Cminimum and quenching in water or rapidly
25、cooling by othermeans.5.3 A solution annealing temperature above 1950 F 1065C may impair the resistance to intergranular corrosion aftersubsequent exposure to sensitizing conditions in TP321,TP321H, TP347, TP347H, TP348, and TP348H. When speci-fied by the purchaser, a lower temperature stabilization
26、 orTABLE 1 Chemical RequirementsGradeUNSDesig-nationComposition,%ACarbon Man-ganesePhos-phorusSul-furSili-conNickel Chromium Molyb-denumTita-niumColum-biumTan-talumNitro-genBOthersTP304 S30400 0.08 2.00 0.045 0.030 0.75 8.011.0 18.020.0 . . . . . . . . . . . . . . . . . .TP304H S30409 0.040.10 2.00
27、0.045 0.030 0.75 8.011.0 18.020.0 . . . . . . . . . . . . . . . . . .TP304N S30451 0.08 2.00 0.045 0.030 0.75 8.011.0 18.020.0 . . . . . . . . . . . . 0.100.16 . . .TP304LN S30453 0.035 2.00 0.045 0.030 0.75 8.011.0 18.020.0 . . . . . . . . . . . . 0.100.16 . . .TP316 S31600 0.08 2.00 0.045 0.030 0.
28、75 11.014.0 16.018.0 2.003.00 . . . . . . . . . . . . . . .TP316H S31609 0.040.10 2.00 0.045 0.030 0.75 11.014.0 16.018.0 2.003.00 . . . . . . . . . . . . . . .TP316N S31651 0.08 2.00 0.045 0.030 0.75 11.014.0 16.018.0 2.003.00 . . . . . . . . . 0.100.16 . . .TP316LN S31653 0.035 2.00 0.045 0.030 0.
29、75 11.014.0 16.018.0 2.003.00 . . . . . . . . . 0.100.16 . . .TP321 S32100 0.08 2.00 0.045 0.030 0.75 9.013.0 17.019.0 . . .C. . . .TP321H S32109 0.040.10 2.00 0.045 0.030 0.75 9.013.0 17.019.0 . . .D. . . .TP347 S34700 0.08 2.00 0.045 0.030 0.75 9.013.0 17.019.0 . . . . . .E. . .TP347H S34709 0.040
30、.10 2.00 0.045 0.030 0.75 9.013.0 17.019.0 . . . . . .F. . .TP347LN S34751 0.005-0.0202.00 0.045 0.030 1.00 9.013.0 17.0 19.0 . . . . . . 0.200.50G. . . 0.060.10 . . .TP348HS34800 0.08 2.00 0.045 0.030 0.75 9.013.0 17.019.0 . . . . . .E0.10 . . . Co 0.20TP348H S34809 0.040.10 2.00 0.045 0.030 1.00 9
31、.013.0 17.019.0F0.1016-8-2H S16800 0.050.10 2.00 0.045 0.030 0.75 7.59.5 14.516.5 1.502.00 . . . . . . . . . . . . . . . . . S31725 0.030 2.00 0.045 0.030 0.75 13.517.5 18.020.0 4.05.0 . . . . . . . . . 0.20 max Cu 0.75. . . S31726 0.030 2.00 0.045 0.030 0.75 14.517.5 17.020.0 4.05.0 . . . . . . . .
32、 . 0.100.20 Cu 0.75. . . S34565 0.030 5.07.0 0.030 0.010 1.0 16.018.0 23.025.0 4.05.0 . . . . . . . . . 0.0400.060 Cb 0.10. . . S31266 0.030 2.004.00 0.035 0.020 1.00 21.024.0 23.025.0 5.26.2 . . . . . . . . . 0.0350.060 Cu1.002.50W 1.502.50AMaximum, unless otherwise indicated. Where ellipses (. . .
33、) appear in this table, there is no requirement and analysis for the element need not be determined or reported.BThe method of analysis for nitrogen shall be a matter of agreement between the purchaser and manufacturer.CThe titanium content shall be not less than five times the carbon content and no
34、t more than 0.70 %.DThe titanium content shall be not less than four times the carbon content and not more than 0.70 %.EThe columbium content shall be not less than ten times the carbon content and not more than 1.10 %.FThe columbium content shall be not less than eight times the carbon content and
35、not more than 1.10 %.GThe columbium content shall not be less than 15 times the carbon content.HThis grade is intended for special purpose applications.A376/A376M 142re-solution anneal shall be used subsequent to the initial hightemperature solution anneal (see Supplementary RequirementS9).5.4 The g
36、rain size of grades 304H, 316H, 321H, 347H, and348H as determined in accordance with Test Methods E112,shall be No. 7 or coarser.6. Chemical Composition6.1 The steel shall conform to the requirements as tochemical composition prescribed in Table 1.7. Product Analysis7.1 At the request of the purchas
37、er, an analysis of one billetfrom each heat or two pipes from each lot shall be made by themanufacturer. A lot of pipe shall consist of the number oflengths as a function of size, as shown below, of the same sizeand wall thickness from any one heat of steel:NPS DN Designator Lengths of Pipe in LotUn
38、der NPS 2 DN 50 400 or fraction thereofNPS 2 DN 50 to NPS 5DN 125, incl200 or fraction thereofOver NPS 5 DN 125 100 or fraction thereof7.2 The results of these analyses shall be reported to thepurchaser or the purchasers representative, and shall conformto the requirements specified in Table 1.7.3 I
39、f the analysis of one of the tests specified in Section 8does not conform to the requirements specified in Section 6,ananalysis of each billet or pipe from the same heat or lot may bemade, and all billets or pipe conforming to the requirementsshall be accepted.8. Tensile Requirements8.1 The material
40、 shall conform to the requirements as totensile properties prescribed in Table 2.9. Workmanship, Finish, and Appearance9.1 The pipe manufacturer shall explore a sufficient numberof visual surface imperfections to provide reasonable assurancethat they have been properly evaluated with respect to dept
41、h.Exploration of all surface imperfections is not required but maybe necessary to assure compliance with 9.2.9.2 Surface imperfections that penetrate more than 1212 %of the nominal wall thickness or encroach on the minimumwall thickness shall be considered defects. Pipe with suchdefects shall be giv
42、en one of the following dispositions:9.2.1 The defect may be removed by grinding provided thatthe remaining wall thickness is within specified limits.9.2.2 Repaired in accordance with the repair welding pro-visions of 9.6.9.2.3 The section of pipe containing the defect may be cutoff within the limit
43、s of requirements on length.9.2.4 Rejected.9.3 To provide a workmanlike finish and basis for evaluat-ing conformance with 9.2, the pipe manufacturer shall removeby grinding the following:9.3.1 Mechanical marks, abrasions (see Note 3), and pits,any of which imperfections are deeper than116 in. 1.6 mm
44、.NOTE 3Marks and abrasions are defined as cable marks, dinges, guidemarks, roll marks, ball scratches, scores, die marks, and so forth.9.3.2 Visual imperfections commonly referred to as scabs,seams, laps, tears, or slivers found by exploration in accor-dance with 9.1 to be deeper than 5 % of the nom
45、inal wallthickness.9.4 At the purchasers discretion, pipe shall be subject torejection if surface imperfections acceptable under 9.2 are notscattered, but appear over a large area in excess of what isconsidered a workmanlike finish. Disposition of such pipe shallbe a matter of agreement between the
46、manufacturer and thepurchaser.9.5 When imperfections or defects are removed by grinding,a smooth curved surface shall be maintained, and the wallthickness shall not be decreased below that permitted by thisspecification. The outside diameter at the point of grinding maybe reduced by the amount so re
47、moved.9.5.1 Wall thickness measurements shall be made with amechanical caliper or with a properly calibrated nondestructivetesting device of appropriate accuracy. In case of dispute, themeasurement determined by use of the mechanical caliper shallgovern.9.6 Weld repair shall be permitted only subjec
48、t to theapproval of the purchaser and in accordance with SpecificationA999/A999M.9.7 The finished pipe shall be reasonably straight.9.8 The pipe shall be free of scale and contaminating ironparticles. Pickling, blasting, or surface finishing is not manda-tory when pipe is bright annealed. The purcha
49、ser may requestthat a passivating treatment be applied.TABLE 2 Tensile RequirementsGradeTensileAstrength,min, ksiMPaYieldstrengthmin,ksiMPaElongation in 2 in. or 50mm(or 4D) min, %Longitudinal TransverseTP304, TP304H,TP304LN, TP316,TP316H, TP316LN,TP347, TP347H,TP347LN, TP348,TP348H, 16-8-2H,S31725755153020535 25TP304N, TP316N,S31726805503524035 25S34565 1157906041535 30TP321, 321H#38 9 755153020535 2538 9B7048025170
