1、Designation: A376/A376M 12A376/A376M 13 Used in USDOE-NE standardsStandard Specification forSeamless Austenitic Steel Pipe for High-TemperatureCentral-Station Service1This standard is issued under the fixed designation A376/A376M; the number immediately following the designation indicates the yearof
2、 original adoption or, in the 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 specification2 covers seamless austenitic steel pipe
3、 intended for high-temperature central-station service. Among thegrades covered are H grades and nitrogen grades that are specifically intended for high-temperature service.NOTE 1This specification was originally developed for use for piping in the central stations of electric-power generating therm
4、al plants. However,its use is not restricted to such applications and it may be used in other applications for which the attributes of the materials, as defined by thisspecification, are appropriate.1.2 Optional supplementary requirements (S1 through S10) are provided. These supplementary requiremen
5、ts specify additionaltests that will be made only when stated in the order, together with the number of such tests required.1.3 Grades TP321 and TP321H have lower strength requirements for nominal wall thicknesses greater than 38 in. 9.5 mm.1.4 The values stated in either inch-pound units or SI unit
6、s 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 exact equivalents; therefore, each system shall be usedindependently of the other. Combining values from the two systems may result in non-conformance with the
7、 standard. Theinch-pound units shall apply unless the “M” designation of this specification is specified in the order.NOTE 2The dimensionless designators NPS (nominal pipe size) and DN (Diametre Nominel) have been substituted in this standard for suchtraditional terms as “nominal diameter,” “size,”
8、and “nominal size.”2. Referenced Documents2.1 ASTM Standards:3A262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless SteelsA999/A999M Specification for General Requirements for Alloy and Stainless Steel PipeE112 Test Methods for Determining Average Grain SizeE213
9、 Practice for Ultrasonic Testing of Metal Pipe and TubingE381 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 and Similar Alloys2.2 Other Stan
10、dards:SNT-TC-1A Personnel Qualification and Certification in Nondestructive Testing43. Ordering Information3.1 Orders for material to this specification should include the following, as required to describe the desired material adequately:3.1.1 Quantity (feet, centimetres, or number of lengths),3.1.
11、2 Name of material (seamless austenitic steel pipe),3.1.3 Grade (Table 1),3.1.4 Size (nominal size, or outside diameter and schedule number or average wall thickness),3.1.5 Lengths (specific or random), (Permissible Variations in Length Section of Specification A999/A999M),1 This specification is un
12、der the jurisdiction 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 May 1, 2012April 1, 2013. Published June 2012May 2013. Originally approved in 1954. Last
13、 previous edition approved in 20062012 asA376/A376M06.12. DOI: 10.1520/A0376_A0376M-12.10.1520/A0376_A0376M-13.2 For ASME Boiler and Pressure Vessel Code applications see related Specification SA-376 in Section II of that Code.3 For referencedASTM standards, visit theASTM website, www.astm.org, or c
14、ontactASTM 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 Society for Nondestructive Testing (ASNT), P.O. Box 28518, 1711 Arlingate Ln., Columbus, OH 43228-0518.This
15、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 technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions
16、 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 this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. Un
17、ited States13.1.6 End finish (Ends Section of Specification A999/A999M),3.1.7 Optional requirements (Section 8) (see Hydrostatic Test Requirements Section and the Permissible Variation in Weight forSeamless Pipe Section for weighing individual lengths, of Specification A999/A999M), (see 9.6, repairi
18、ng by welding; 13.3, diestamping),3.1.8 Test report required (Certification Section of Specification A999/A999M),3.1.9 Specification designation, and3.1.10 Special requirements or any supplementary requirements selected, or both.4. General Requirements4.1 Material furnished to this specification sha
19、ll conform to the applicable requirements of the current edition of SpecificationA999/A999M unless otherwise provided herein.5. Materials and Manufacture5.1 ManufactureAt the manufacturers option, pipe may be either hot finished or cold finished, with a suitable finishingtreatment, where necessary.5
20、.2 Heat Treatment:5.2.1 All pipe shall be furnished in the heat-treated condition unless the order specifically states that no final heat treatment shallbe applied. When the order is furnished without final heat treatment, each pipe shall be stenciled “HT-O.”5.2.2 As an alternate to final heat treat
21、ment in a continuous furnace or batch-type furnace, immediately following hot formingwhile the temperature of the pipes is not less than the specified minimum solution treatment temperature, pipes may be individuallyquenched in water or rapidly cooled by other means.5.2.3 Grades TP304, TP304N, TP304
22、LN, TP316, TP316N, TP316LN, TP321, TP347, TP347LN, TP348, 16-8-2H, S 31725, andS 31726 Unless otherwise stated in the order, heat treatment shall consist of heating to a minimum temperature of 1900 F 1040C and quenching in water or rapidly cooling by other means.5.2.3.1 The purchaser may specify con
23、trolled structural or special service characteristics which shall be used as a guide for themost suitable heat treatment. If the final heat treatment is at a temperature under 1900 F 1040 C, each pipe shall be stenciledwith the final heat treatment temperature in degrees Fahrenheit or Celsius after
24、the suffix “HT.”5.2.4 Grades TP304H, TP316H, TP321H, TP347H, TP348H, and 16-8-2HIf cold working is involved in processing, theminimum solution-treating temperature for GradesTP321H,TP347H, andTP348H shall be 2000 F 1100 C, for GradesTP304Hand TP316H, 1900 F 1040 C, and for Grade 16-8-2H, 1800 F 980
25、C. If the material is hot-rolled, the minimumTABLE 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 . . . . . . . . . . .
26、 . . . . . . .TP304H S30409 0.040.10 2.00 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
27、. . .TP316 S31600 0.08 2.00 0.045 0.030 0.75 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 . .
28、 .TP316LN S31653 0.035 2.00 0.045 0.030 0.75 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.
29、08 2.00 0.045 0.030 0.75 9.013.0 17.019.0 . . . . . . E . . . . . . . . .TP347H S34709 0.040.10 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 . . .TP348H S34800 0.08 2.00 0.0
30、45 0.030 0.75 9.013.0 17.019.0 . . . . . . E 0.10 . . . Co 0.20TP348H S34809 0.040.10 2.00 0.045 0.030 1.00 9.013.0 17.019.0 F 0.1016-8-2H 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 . .
31、. . . . . . . 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 . . . . . . . . . 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 0.10AMaximum, unless otherwise indicated. Where ellipses (. . .) appear
32、 in this table, there is no requirement and analysis for the element need not be determined or reported.B The method of analysis for nitrogen shall be a matter of agreement between the purchaser and manufacturer.C The titanium content shall be not less than five times the carbon content and not more
33、 than 0.70 %.D The titanium content shall be not less than four times the carbon content and not more than 0.70 %.E The columbium content shall be not less than ten times the carbon content and not more than 1.10 %.F The columbium content shall be not less than eight times the carbon content and not
34、 more than 1.10 %.GThe columbium content shall not be less than 15 times the carbon content.H This grade is intended for special purpose applications.A376/A376M 132solution-treating temperatures for Grades TP321H, TP347H, and TP348H shall be 1925 F 1050 C, for Grades TP304H andTP316H, 1900 F 1040 C,
35、 and for Grade 16-8-2H, 1800 F 980 C.5.2.5 Grade S34565Heat treatment shall consist of heating to a temperature in the range of 2050 F 1120 C minimum and2140 F 1170 C maximum, and quenching in water or rapidly cooling by other means.5.3 A solution annealing temperature above 1950 F 1065 C may impair
36、 the resistance to intergranular corrosion aftersubsequent exposure to sensitizing conditions in TP321, TP321H, TP347, TP347H, TP348, and TP348H. When specified by thepurchaser, a lower temperature stabilization or re-solution anneal shall be used subsequent to the initial high temperature solutiona
37、nneal (see Supplementary Requirement S9).5.4 The grain size of grades 304H, 316H, 321H, 347H, and 348H as determined in accordance with Test Methods E112, shallbe No. 7 or coarser.6. Chemical Composition6.1 The steel shall conform to the requirements as to chemical composition prescribed in Table 1.
38、7. Product Analysis7.1 At the request of the purchaser, an analysis of one billet from each heat or two pipes from each lot shall be made by themanufacturer. A lot of pipe shall consist of the number of lengths as a function of size, as shown below, of the same size and wallthickness from any one he
39、at of steel:NPS DN Designator Lengths of Pipe in LotUnder 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 the purchaser or the purchasers representative, and shal
40、l conform to therequirements specified in Table 1.7.3 If the analysis of one of the tests specified in Section 8 does not conform to the requirements specified in Section 6, ananalysis of each billet or pipe from the same heat or lot may be made, and all billets or pipe conforming to the requirement
41、s shallbe accepted.8. Tensile Requirements8.1 The material shall conform to the requirements as to tensile properties prescribed in Table 2.9. Workmanship, Finish, and Appearance9.1 The pipe manufacturer shall explore a sufficient number of visual surface imperfections to provide reasonable assuranc
42、e thatthey have been properly evaluated with respect to depth. Exploration of all surface imperfections is not required but may benecessary to assure compliance with 9.2.TABLE 2 Tensile RequirementsGradeTensileAstrength,min, ksiMPaYieldstrengthmin,ksiMPaElongation in 2 in. or 50mm(or 4D) min, %Longi
43、tudinal TransverseTP304, TP304H,TP304LN, TP316,TP316H, TP316LN,TP347, TP347H,TP347LN, TP348,TP348H, 16-8-2H,S317257551530205 35 25TP304N, TP316N,S317268055035240 35 25S34565 1157906041535 30TP321, 321H#38 9 755153020535 2538 9B 704802517035 25AFor grade TP304, NPS8 or larger, and in schedules 140 an
44、d heavier, the requiredminimum tensile strength shall be 70 ksi 480 MPa.B Prior to the issuance of A376/A376M 88, the tensile and yield strength valueswere 75 520 and 30 210 respectively, for nominal wall greater than 38 in. 9.5mm.A376/A376M 1339.2 Surface imperfections that penetrate more than 1212
45、 % of the nominal wall thickness or encroach on the minimum wallthickness shall be considered defects. Pipe with such defects shall be given one of the following dispositions:9.2.1 The defect may be removed by grinding provided that the remaining wall thickness is within specified limits.9.2.2 Repai
46、red in accordance with the repair welding provisions of 9.6.9.2.3 The section of pipe containing the defect may be cut off within the limits of requirements on length.9.2.4 Rejected.9.3 To provide a workmanlike finish and basis for evaluating conformance with 9.2, the pipe manufacturer shall remove
47、bygrinding the following:9.3.1 Mechanical marks, abrasions (see Note 23), and pits, any of which imperfections are deeper than 116 in. 1.6 mm.NOTE 3Marks and abrasions are defined as cable marks, dinges, guide marks, roll marks, ball scratches, scores, die marks, and so forth.9.3.2 Visual imperfecti
48、ons commonly referred to as scabs, seams, laps, tears, or slivers found by exploration in accordance with9.1 to be deeper than 5 % of the nominal wall thickness.9.4 At the purchasers discretion, pipe shall be subject to rejection if surface imperfections acceptable under 9.2 are notscattered, but ap
49、pear over a large area in excess of what is considered a workmanlike finish. Disposition of such pipe shall be amatter of agreement between the manufacturer and the purchaser.9.5 When imperfections or defects are removed by grinding, a smooth curved surface shall be maintained, and the wall thicknessshall not be decreased below that permitted by this specification. The outside diameter at the point of grinding m
