1、Designation: A579/A579M 04a (Reapproved 2014)A579/A579M 17Standard Specification forSuperstrength Alloy Steel Forgings1This standard is issued under the fixed designation A579/A579M; the number immediately following the designation indicates the yearof original adoption or, in the case of revision,
2、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 Scope*1.1 This specification covers requirements for forged steel shapes for highly stressed structural membe
3、rs requiring yieldstrengths in excess of 140 ksi 965 MPa.1.2 This specification is not intended for applications limited by creep deformation.1.3 Twenty-sevenTwenty-eight grades are covered by this specification. Selection will depend upon design, service conditions,and mechanical properties require
4、d.1.4 Supplementary requirements are provided for use when additional testing or inspection is desired. These shall apply onlywhen specified individually by the purchaser in the order.1.5 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values s
5、tated in eachsystem may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from thetwo systems may result in non-conformance with the standard.1.6 Unless the order specifies the applicable “M” specification designation, the material shall be f
6、urnished to the inch-poundunits.2. Referenced Documents2.1 ASTM Standards:2A255 Test Methods for Determining Hardenability of SteelA275/A275M Practice for Magnetic Particle Examination of Steel ForgingsA370 Test Methods and Definitions for Mechanical Testing of Steel ProductsA388/A388M Practice for
7、Ultrasonic Examination of Steel ForgingsA788/A788M Specification for Steel Forgings, General RequirementsE3 Guide for Preparation of Metallographic SpecimensE21 Test Methods for Elevated Temperature Tension Tests of Metallic MaterialsE45 Test Methods for Determining the Inclusion Content of SteelE11
8、2 Test Methods for Determining Average Grain SizeE165/E165M Practice for Liquid Penetrant Examination for General Industry3. Ordering Information and General Requirements3.1 In addition to the ordering information required by Specification A788/A788M, the purchaser shall include with the inquiryand
9、order a detailed drawing, sketch, or written description of the forging.3.2 Material supplied to this specification shall conform to the requirements of Specification A788/A788M, which outlinesadditional ordering information, manufacturing requirements, testing and retesting methods and procedures,
10、marking, certification,product analysis variations, and additional supplementary requirements.3.3 If the requirements of this specification are in conflict with the requirements of Specification A788/A788M, therequirements of this specification shall prevail.1 This specification is under the jurisdi
11、ction ofASTM Committee A01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee A01.06on Steel Forgings and Billets.Current edition approved Oct. 1, 2014Feb. 1, 2017. Published October 2014February 2017. Originally approved in 1967. Last previous edition appro
12、ved in 20092014 asA579/A579M 04a (2009).(2014). DOI: 10.1520/A0579_A0579M-04AR14. 10.1520/A0579_A0579M-17.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standar
13、dsstandards Document Summary page on the ASTM website.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 technically possible to adequately depict all changes ac
14、curately, 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 this standardCopyright ASTM International, 100 Barr Harb
15、or Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14. Materials and Manufacture4.1 The steel shall be made in accordance with the Melting Process Section of Specification A788/A788M. A sufficient discardshall be made to secure freedom from injurious pipe and undue segregation.4.2
16、 The material shall be forged as close as practical to the specified shape and size.4.3 The finished product shall be a hot-worked forging as defined by Specification A788/A788M.4.4 Heat Treatment Performed by Forging SupplierForgings may be furnished in one of the following conditions as specifiedi
17、n the inquiry and purchase order (some conditions are not applicable to all grades):4.4.1 Stress relieved,4.4.2 Annealed,4.4.3 Solution treated,4.4.4 Solution treated and aged,4.4.5 Normalized,4.4.6 Normalized and tempered, or4.4.7 Quenched and tempered.4.5 Heat Treatment Performed by PurchaserWhen
18、final heat treatment is to be performed by the purchaser after machiningor fabrication, or both, a capability heat treatment duplicating the purchasers final heat treatment must be performed by thesupplier on representative samples (see 6.3) to qualify the forgings. The results of these capability t
19、ests shall conform to therequirements of Table 1 and Table 2. See also Table 3.TABLE 1 Minimum Tension Test RequirementsGrade Yield Strength(0.2 % offset),ksi MPaTensile Strength,ksi MPaElongation,A ,%Reductionof Area,A ,%Quench and Tempered13, 21, 22, 23, 12, 12a 140 965 150 1035 13 4013, 21, 22, 2
20、3, 11 160 1100 175 1210 12 3613, 21, 22, 23, 31 180 1240B 190 1310 10 3213, 21, 22, 23 200 1380B 210 1450 9 2822C , 23, 32, 33 225 1550B 250 1720 6 25Air Hardening41 200 1380B 260 1790 9 3041 225 1550B 280 1930 8 25Martensitic Stainless51, 52, 53 140 965 175 1210 12 4552 160 1100 220 1520 10 40No. 1
21、 Precipitation Hardening Stainless61 140 965 165 1140 12 5061 160 1100 180 1240 10 4561 180 1240B 200 1380 8 40No. 2 Precipitation Hardening Stainless64 140 965 165(1140 12 2564 160 1100 185 1275 10 2564 180 1240B 210 1450 10 25No. 3 Precipitation Hardening Stainless62 140 965 165 1140 6 2562, 63 16
22、0 1100 180 1240 6 2563 180 1240B 200 1380 6 2563 200 1380B 225 1550 5 25Maraging Steels74 160 1100 170 1170 15 6575 180 1240B 190 1310 14 6071 200 1380B 210 1450 12 5572 250 1720B 255 1760 10 4573 275 1895B 280 1930 9 40Miscellaneous81 180 1240D 190 1310 13 4582 200 1380D 210 1450 10 3083D 225 1550D
23、 260 1790 7 2083E 250 1720D 280 1930 4 1584 180 1240D 185 1275 14 4585 180 1240 210 1450 10 35A See Note in Table 3.B Vacuum melting normally required to achieve list properties.C By agreement.D Bainitic.E Martensitic.A579/A579M 172TABLE 2 Minimum Room-Temperature Charpy V-Notch Energy AbsorptionA f
24、or Respective Yield Strength Classes, ftlbf JGrade Yield Strength Class, ksi MPa1409651601100180B1240200B1380225B1550250B1720275B190011 . . . 45 60 . . . . . . . . . . . . . . .12, 12a 50 70 . . . . . . . . . . . . . . . . . .13 20 25 10 15 C . . . . . . . . . . . .21 35 45 30 40 20 25 15 20 . . . .
25、 . . . . .22 30 40 25 35 20 25 15 20 . . . . . . . . .23 35 45 25 35 20 25 15 20 10 15 . . . . . .31 . . . . . . 25 35 . . . . . . . . . . . .32 . . . . . . . . . . . . 12 17 . . . . . .33 . . . . . . . . . . . . 15 20 . . . . . .41 . . . . . . . . . 15 20 C . . . . . .51 15 20 . . . . . . . . . . .
26、 . . . . . . .52 C C . . . . . . . . . . . . . . .53 C . . . . . . . . . . . . . . . . . .61 25 35 . . . C . . . . . . . . . . . .62 C C . . . . . . . . . . . . . . .63 C C C . . . . . . . . . . . .64 25 35 15 20 15 20 . . . . . . . . . . . .71 . . . . . . . . . 35 45 . . . . . . . . .72 . . . . . .
27、 . . . . . . . . . 20 25 . . .73 . . . . . . . . . . . . . . . . . . 15 2074 . . . 60 80 50 70 . . . . . . . . . . . .81 . . . . . . 25 35 . . . . . . . . . . . .82 . . . . . . . . . 20 25 . . . . . . . . .83 . . . . . . . . . . . . 15 20 10 15 . . .84 . . . . . . 25 35 . . . . . . . . . . . .85 . .
28、 . . . . 40 55 . . . . . . . . . . . .A See Note in Table 3.B Vacuum melting may be required to achieve listed properties.C By agreement.TABLE 3 Material, Maximum Annealed Hardness (HB), and Section Size Capability in Inches mm forRespective Yield Strength ClassesNOTE 1Tables 1-3 show grades and max
29、imum section sizes in which the indicated yield strength levels can usually be achieved at a 1/414 thicknessdepth in the direction of maximum working. Because of variations in forging configuration and processing it does not follow that the ductility and impactstrengths listed in Table 1 and Table 2
30、 can always be obtained at these depths. The properties listed are minimums, unless otherwise agreed by purchaserand manufacturer.Grade MaximumAnnealedHardness(HB)Yield Strength Class, ksi MPa14096516011001801240200138022515502501720275190011 321 . . . 6.5 165 . . . . . . . . . . . . . . .12, 12a .
31、. . 4.0 100 . . . . . . . . . . . . . . . . . .13 229 1.0 25 1.0 25 1.0 25 . . . . . . . . . . . .21 285 4.5 115 4.5 115 4.0 100 4.0 100 . . . . . . . . .22 302 4.5 115 4.5 115 4.0 100 4.0 100 3.5 90 . . . . . .23 302 8.0 200 8.0 200 8.0 200 8.0 200 8.0 200 . . . . . .31 262 . . . . . . 3.0 75 . . .
32、 . . . . . . . . .32 302 . . . . . . . . . . . . 5.5 140 . . . . . .33 302 . . . . . . . . . . . . 2.0 50 . . . . . .41 235 . . . . . . . . . 6.0 150 6.0 150 . . . . . .51 197 2.0 50 . . . . . . . . . . . . . . . . . .52 255 2.0 50 2.0 50 . . . . . . . . . . . . . . .53 285 4.0 100 . . . . . . . . .
33、 . . . . . . . . .61 375 8.0 200 8.0 200 1.0 25 . . . . . . . . . . . .62 207 6.0 150 6.0 150 . . . . . . . . . . . . . . .63 241 . . . 6.0 150 6.0 150 6.0 150 . . . . . . . . .64 321 6.0 150 6.0 150 6.0 150 . . . . . . . . . . . .71 321 . . . . . . . . . 12.0 300 . . . . . . . . .72 321 . . . . . .
34、 . . . . . . . . . 12.0 300 . . .73 321 . . . . . . . . . . . . . . . . . . 12.0 30074 321 . . . 12.0 300 . . . . . . . . . . . . . . .75 321 . . . . . . 12.0 300 . . . . . . . . . . . .81 341 . . . . . . 6.0 150 . . . . . . . . . . . .82 341 . . . . . . . . . 5.0 125 . . . . . . . . .83 341 . . . .
35、 . . . . . . . . 3.0 75 3.0 75 . . .84 341 . . . . . . 6.0 150 . . . . . . . . . . . .85 321 . . . . . . 10.0 250 . . . . . . . . . . . .A579/A579M 1735. Chemical Requirements5.1 Heat AnalysisThe heat analysis obtained from sampling in accordance with Specification A788/A788M shall comply withTable
36、4.5.2 Product AnalysisThe product analysis provisions of Specification A788/A788M may be used by the purchaser.TABLE 4 Chemical RequirementsElements Composition, %min max min max min max min max min max min max min maxGrade 11 12 12a 13 21 22 23Carbon 0.23 0.28 . . . 0.12 . . . 0.20 0.27 0.33 0.31 0
37、.38 0.38 0.43 0.45 0.50Manganese . . . 0.20 0.60 0.90 0.60 0.90 0.40 0.60 0.60 0.90 0.60 0.90 0.60 0.90Phosphorus . . . 0.01 . . . 0.010 . . . 0.015 . . . 0.025 . . . 0.025 . . . 0.025 . . . 0.015Sulfur . . . 0.01 . . . 0.010 . . . 0.015 . . . 0.025 . . . 0.025 . . . 0.025 . . . 0.015Silicon . . . 0
38、.10 0.20 0.35 0.20 0.35 0.20 0.35 0.20 0.35 0.20 0.35 0.15 0.30Nickel 2.75 3.25 4.75 5.25 4.75 5.25 . . . . . . 1.65 2.00 1.65 2.00 0.40 0.70Chromium 1.40 1.65 0.40 0.70 0.40 0.70 0.80 1.10 0.65 0.90 0.70 0.90 0.90 1.20Molybdenum 0.8 1.0 0.30 0.65 0.30 0.65 0.15 0.25 0.30 0.60 0.30 0.60 0.90 1.10Van
39、adium . . . . . . 0.05 0.10 0.05 0.10 0.05 0.10 0.17 0.23 0.05 0.10 0.08 0.15Columbium 0.03 0.07 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Niobium/ColumbiumA0.03 0.07 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Grade 31 32 33 41 51 52 53AGrade
40、31 32 33 41 51 52 53BCarbon 0.23 0.28 0.40 0.45 0.41 0.46 0.38 0.43 . . . 0.15 0.20 0.25 . . . 0.20Manganese 1.20 1.50 0.65 0.90 0.75 1.00 0.20 0.40 . . . 1.00 0.50 1.00 . . . 1.00Phosphorus . . . 0.025 . . . 0.025 . . . 0.025 . . . 0.015 . . . 0.025 . . . 0.025 . . . 0.025Sulfur . . . 0.025 . . . 0
41、.025 . . . 0.025 . . . 0.015 . . . 0.025 . . . 0.025 . . . 0.025Silicon 1.30 1.70 1.45 1.80 1.40 1.75 0.80 1.00 . . . 1.00 . . . 0.50 . . . 1.00Nickel 1.65 2.00 1.65 2.00 . . . . . . . . . . . . . . . 0.75 0.50 1.00 1.25 2.50Chromium 0.20 0.40 0.65 0.90 1.90 2.25 4.75 5.25 11.5 13.5 11.0 12.5 15.0 1
42、7.0Molybdenum 0.35 0.45 0.30 0.45 0.45 0.60 1.20 1.40 . . . 0.50 0.90 1.25 . . . . . .Copper . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.50 . . . . . . . . . . . .Titanium . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.05 . . . . . .Vanadium . . . . . . . . . . . . 0
43、.03 0.08 0.40 0.60 . . . . . . 0.20 0.30 . . . . . .Cobalt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.25 . . . . . .Aluminum . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.05 . . . 0.05 . . . . . .Tungsten . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
44、0.90 1.25 . . . . . .Tin . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.05 . . . 0.04 . . . . . .Grade 61A,B 62A,B 63A,B 64A,B 71A,B 72A,B 73A,BGrade 61B,C 62B,C 63B,C 64B,C 71B,C 72B,C 73B,CCarbon . . . 0.07 . . . 0.09 . . . 0.09 0.10 0.15 . . . 0.03 . . . 0.03 . . . 0.03Manganese . . . 1.
45、00 . . . 1.00 . . . 1.00 0.50 1.25 . . . 0.10 . . . 0.10 . . . 0.10Phosphorus . . . 0.025 . . . 0.025 . . . 0.025 . . . 0.025 . . . 0.01 . . . 0.01 . . . 0.01Sulfur . . . 0.025 . . . 0.025 . . . 0.025 . . . 0.025 . . . 0.01 . . . 0.01 . . . 0.01Silicon . . . 1.00 . . . 1.00 . . . 0.50 . . . 0.50 . .
46、 . 0.10 . . . 0.10 . . . 0.10Nickel 3.0 5.0 6.5 7.75 6.5 7.75 4.0 5.0 17.0 19.0 17.0 19.0 18.0 19.0Chromium 15.5 17.5 16.0 18.0 14.0 15.25 15.0 16.0 . . . . . . . . . . . . . . . . . .Molybdenum . . . . . . . . . . . . 2.0 2.75 2.50 3.25 3.0 3.5 4.6 5.2 4.6 5.2Copper 3.0 5.0 . . . . . . . . . . . .
47、. . . . . . . . . . . . . . . . . . . . . . . .Titanium . . . . . . . . . . . . . . . . . . . . . . . . 0.15 0.25 0.30 0.50 0.50 0.80Columbium 0.15 0.45 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Cobalt . . . . . . . . . . . . . . . . . . . . . . . . 8.0 9.0 7.0 8.5 8.5 9
48、.5Aluminum . . . . . . 0.75 1.50 0.75 1.25 . . . . . . 0.05 0.15 0.05 0.15 0.05 0.15Nitrogen . . . . . . . . . . . . . . . . . . 0.07 0.13 . . . . . . . . . . . . . . . . . .Grade 74A,B 75A,B 81A,B 82A,B 83A,B 84A,BGrade 74B,C 75B,C 81B,C 82B,C 83B,C 84B,C 85Carbon . . . 0.03 . . . 0.03 0.24 0.30 0.28 0.34 0.42 0.47 0.16 0.23 0.20 0.25Manganese . . . 0.10 . . . 0.10 0.10 0.35 0.10 0.35 0.10 0.35 0.20 0.40 1.75 2.25Phosphorus . . . 0.01 . . . 0.01 . . . 0.01 . . . 0.01 . . . 0.01 . . . 0.010 . . . 0.025Sulfur . . . 0.01 . . . 0.01 . .
