1、Designation: A743/A743M 13a1A743/A743M 17Standard Specification forCastings, Iron-Chromium, Iron-Chromium-Nickel, CorrosionResistant, for General Application1This standard is issued under the fixed designation A743/A743M; the number immediately following the designation indicates the yearof original
2、 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.This standard has been approved for use by agencies of the U.S. Department of D
3、efense.1 NOTETable 2 and Table S12.1 were editorially corrected in January 2014.1. Scope*1.1 This specification covers iron-chromium and iron-chromium-nickel alloy castings for general corrosion-resistant applica-tion. The grades covered by this specification represent types of alloy castings suitab
4、le for broad ranges of application which areintended for a wide variety of corrosion environments.NOTE 1For alloy castings for severe corrosion-resistant service, reference should be made to Specification A744/A744M. For general heat-resistantalloy castings, reference should be made to Specification
5、 A297/A297M. For nickel alloy castings for corrosion-resistant service, reference should be madeto Specification A494/A494M.1.2 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI unitsare shown in brackets. The values stated in
6、 each system are not exact equivalents; therefore, each system must be usedindependently of the other. Combining values from the two systems may result in nonconformance with the specification.Inch-pound units are applicable for material ordered to Specification A743 and SI units for material ordere
7、d to SpecificationA743M.1.3 This international standard was developed in accordance with internationally recognized principles on standardizationestablished in the Decision on Principles for the Development of International Standards, Guides and Recommendations issuedby the World Trade Organization
8、Technical Barriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2A262 Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless SteelsA297/A297M Specification for Steel Castings, Iron-Chromium and Iron-Chromium-Nickel, Heat Resistant, for GeneralApp
9、licationA370 Test Methods and Definitions for Mechanical Testing of Steel ProductsA494/A494M Specification for Castings, Nickel and Nickel AlloyA744/A744M Specification for Castings, Iron-Chromium-Nickel, Corrosion Resistant, for Severe ServiceA781/A781M Specification for Castings, Steel and Alloy,
10、Common Requirements, for General Industrial UseA890/A890M Specification for Castings, Iron-Chromium-Nickel-Molybdenum Corrosion-Resistant, Duplex (Austenitic/Ferritic) for General ApplicationA957A957/A957M Specification for Investment Castings, Steel and Alloy, Common Requirements, for General Indus
11、trial Use3. General Conditions for Delivery3.1 Except for investment castings, castings furnished to this specification shall conform to the requirements of SpecificationA781/A781M, including any supplementary requirements that are indicated on the purchase order. Failure to comply with the1 This sp
12、ecification is under the jurisdiction ofASTM Committee A01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee A01.18on Castings.Current edition approved May 15, 2013Nov. 1, 2017. Published June 2013November 2017. Originally approved in 1977. Last previous ed
13、ition approved in 20132014 asA743/A743M 13.A743/A743M 13a1. DOI: 10.1520/A0743_A0743M-13AE01.10.1520/A0743_A0743M-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
14、the standards 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
15、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 this standardCopyright ASTM International, 100 Barr Ha
16、rbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1general requirements of Specification A781/A781M constitutes nonconformance with this specification. In case of conflict betweenthe requirements of this specification and Specification A781/A781M, this specification shall preva
17、il.3.2 Steel investment castings furnished to this specification shall conform to the requirements of Specification A957A957/A957M, including any supplementary requirements that are indicated in the purchase order. Failure to comply with the generalrequirements of Specification A957A957/A957M consti
18、tutes nonconformance with this specification. In case of conflict betweenthe requirements of this specification and Specification A957A957/A957M, Specification A957A957/A957M shall prevail.4. Ordering Information4.1 Orders for material to this specification should include the following, as required,
19、 to describe the material adequately:4.1.1 Description of the casting by pattern number or drawing,4.1.2 Grade,4.1.3 Heat treatment,4.1.4 Options in the specification,4.1.5 Whether castings are to be produced using the investment casting process, and4.1.6 Supplementary requirements desired, includin
20、g the standards of acceptance.5. Process5.1 The steel shall be made by the electric furnace process with or without separate refining such as argon-oxygendecarburization (AOD).6. Heat Treatment6.1 Castings shall be heat treated in accordance with the requirements in Table 1.NOTE 2Proper heat treatme
21、nt of these alloys is usually necessary to enhance corrosion resistance and in some cases to meet mechanical properties.Minimum heat treat temperatures are specified; however, it is sometimes necessary to heat treat at higher temperatures, hold for some minimum time attemperature and then rapidly co
22、ol the castings in order to enhance the corrosion resistance and meet mechanical properties.7. Chemical Requirements7.1 The chemical requirements are shown in Table 2.TABLE 2 Chemical RequirementsGrade(UNS) TypeComposition, %Carbon,maxMan-ganese,maxSilicon,maxPhospho-rus, maxSulfur,max Chromium Nick
23、elMolybde-numColum-biumSele-nium CopperTung-sten,maxVana-dium,maxNitrogenCA6N 11 Chromium, 0.06 0.50 1.00 0.02 0.02 10.512.5 6.0 . . . . . . .7 Nickel 8.0CA6NM(J91540)12 Chromium,4 Nickel0.06 1.00 1.00 0.04 0.03 11.514.0 3.54.50.401.0 . . . . . .CA15(J91150)12 Chromium 0.15 1.00 1.50 0.04 0.04 11.51
24、4.0 1.00max0.50 max . . . . . .CA15M(J91151)12 Chromium 0.15 1.00 0.65 0.040 0.040 11.514.0 1.0max0.151.0 . . . . . .CA28MWV(J91422)12 Chromium, withMolybdenum,Tungsten andVanadium0.200.280.501.001.0 0.030 0.030 11.012.5 0.501.000.901.25 . . . 0.901.250.200.30.CA40(J91153)12 Chromium 0.200.401.00 1.
25、50 0.04 0.04 11.514.0 1.0max0.5 max . . . . . .CA40F(J91154)12 Chromium,Free Machining0.200.401.00 1.50 0.04 0.200.4011.514.0 1.0max0.5 max . . . . . .CB6(J91804)16 Chromium,4 Nickel0.06 1.00 1.00 0.04 0.03 15.517.5 3.55.5 0.5 max . . . . . . . . . . . . . . . . . .CB30(J91803)20 Chromium 0.30 1.00
26、1.50 0.04 0.04 18.021.0 2.00max. . . B . . .CC50(J92615)28 Chromium 0.50 1.00 1.50 0.04 0.04 26.030.0 4.00max. . . . . . .A743/A743M 172TABLE 2 ContinuedGrade(UNS) TypeComposition, %Carbon,maxMan-ganese,maxSilicon,maxPhospho-rus, maxSulfur,max Chromium NickelMolybde-numColum-biumSele-nium CopperTung
27、-sten,maxVana-dium,maxNitrogenCE30(J93423)29 Chromium,9 Nickel0.30 1.50 2.00 0.04 0.04 26.030.0 8.011.0. . . . . . .CF3(J92500)19 Chromium,9 Nickel0.03 1.50 2.00 0.04 0.04 17.021.0 8.012.0. . . . . . .CF3M(J92800)19 Chromium,10 Nickel, withMolybdenum0.03 1.50 1.50 0.04 0.04 17.021.0 9.013.02.03.0 .
28、. . . . .TABLE 1 Heat Treatment RequirementsGrade Heat TreatmentCA6N Heat to 1900F 1040C, air cool, reheat to 1500F 815C, air cool, and age at 800F 425C, holding at eachtemperature sufficient time to heat casting uniformly to temperature.CA6NM Heat to 1850F 1010C minimum, air cool to 200F 95C or low
29、er prior to any optional intermediate temper andprior to the final temper. The final temper shall be between 1050F 565C and 1150F 620C.CA15, CA15M, CA40, CA40F (1) Heat to 1750F 955C minimum, air cool and temper at 1100F 595C minimum, or(2) Anneal at 1450F 790C minimum.CA28MWV (1) Heat to 18751925F
30、10251050C, quench in air or oil, and temper at 1150F 620C minimum, or(2) Anneal at 1400F 760C minimum.CB30, CC50 (1) Heat to 1450F 790C minimum, and air cool, or(2) Heat to 1450F 790C minimum, and furnace cool.CB6 Heat between 1800F 980C and 1920F 1050C, forced air, cool to 120F 50C maximum, and tem
31、perbetween 1100F and 1160F 595C and 625C.CE30, CH10, CH20, CK20 Heat to 2000F 1093C minimum, hold for sufficient time to heat casting to temperature, quench in water or rapidcool by other means.CF3, CF3M, CF3MN (1) Heat to 1900F 1040C minimum, hold for sufficient time to heat casting to temperature,
32、 quench in water orrapid cool by other means.(2) As cast if corrosion resistance is acceptable.CF8, CF8C, CF8M, CF16F, CF16Fa,CF20, CG3M, CG8M, CG12Heat to 1900F 1040C minimum, hold for sufficient time to heat casting to temperature, quench in water or rapidcool by other means.CF10SMnN Heat to 1950F
33、 1065C minimum, hold for sufficient time to heat casting to temperature, quench in water or rapidcool by other means.CK3MCuN, CK35MN, CN3M, CN3MN Heat to 2200F 1200C minimum, hold for 4 hours minimum, quench in water or rapid cool by other means.CG6MMN, CN7M Heat to 2050F 1120C minimum, hold for suf
34、ficient time to heat casting to temperature, quench in water or rapidcool by other means.CN7MS Heat to 2100F 1150C minimum, 2150F 1180C maximum, hold for sufficient time (2 h minimum) to heatcasting to temperature and quench in water.HG10MNN As-castTABLE 1 Heat Treatment RequirementsGrade Heat Treat
35、mentCA6N Heat to 1900 F 1040 C, air cool, reheat to 1500 F 815 C, air cool, and age at 800 F 425 C, holding ateach temperature sufficient time to heat casting uniformly to temperature.CA6NM Heat to 1850 F 1010 C minimum, air cool to 200 F 95 C or lower prior to any optional intermediate temperand pr
36、ior to the final temper. The final temper shall be between 1050 F 565 C and 1150 F 620 C.CA15, CA15M, CA40, CA40F (1) Heat to 1750 F 955 C minimum, air cool and temper at 1100 F 595 C minimum, or(2) Anneal at 1450 F 790 C minimum.CA28MWV (1) Heat to 18751925 F 10251050 C, quench in air or oil, and t
37、emper at 1150 F 620 C minimum, or(2) Anneal at 1400 F 760 C minimum.CB30, CC50 (1) Heat to 1450 F 790 C minimum, and air cool, or(2) Heat to 1450 F 790 C minimum, and furnace cool.CB6 Heat between 1800 F 980 C and 1920 F 1050 C, forced air, cool to 120 F 50 C maximum, and temperbetween 1100 F and 11
38、60 F 595 C and 625 C.CE30, CH10, CH20, CK20 Heat to 2000 F 1093 C minimum, hold for sufficient time to heat casting to temperature, quench in water orrapid cool by other means.CF3, CF3M, CF3MN (1) Heat to 1900 F 1040 C minimum, hold for sufficient time to heat casting to temperature, quench in water
39、 orrapid cool by other means.(2) As cast if corrosion resistance is acceptable.CF8, CF8C, CF8M, CF16F, CF16Fa,CF20, CG3M, CG8M, CG12Heat to 1900 F 1040 C minimum, hold for sufficient time to heat casting to temperature, quench in water orrapid cool by other means.CF10SMnN Heat to 1950 F 1065 C minim
40、um, hold for sufficient time to heat casting to temperature, quench in water orrapid cool by other means.CK3MCuN, CK35MN, CN3M, CN3MN Heat to 2200 F 1200 C minimum, hold for 4 h minimum, quench in water or rapid cool by other means.CG6MMN, CN7M Heat to 2050 F 1120 C minimum, hold for sufficient time
41、 to heat casting to temperature, quench in water orrapid cool by other means.CN7MS Heat to 2100 F 1150 C minimum, 2150 F 1180 C maximum, hold for sufficient time (2 h minimum) to heatcasting to temperature and quench in water.HG10MNN As castA743/A743M 173TABLE 2 ContinuedGrade(UNS) TypeComposition,
42、%Carbon,maxMan-ganese,maxSilicon,maxPhospho-rus, maxSulfur,max Chromium NickelMolybde-numColum-biumSele-nium CopperTung-sten,maxVana-dium,maxNitrogenCF3MN(J92804)19 Chromium,10 Nickel, withMolybdenum, andNitrogen0.03 1.50 1.50 0.040 0.040 17.022.0 9.013.02.03.0 . . . . . 0.100.20CF8(J92600)19 Chromi
43、um,9 Nickel0.08 1.50 2.00 0.04 0.04 18.021.0 8.011.0. . . . . . .CF8C(J92710)19 Chromium,10 Nickel, withColumbium0.08 1.50 2.00 0.04 0.04 18.021.0 9.012.0. A . . . . .CF8M(J92900)19 Chromium,10 Nickel, withMolybdenum0.08 1.50 2.00 0.04 0.04 18.021.0 9.012.02.03.0 . . . . . .CF10SMnN(J92972)17 Chromi
44、um, 8.5Nickel withNitrogen0.10 7.009.003.504.500.060 0.030 16.018.0 8.09.0. . . . . . 0.080.18CF16F(J92701)19 Chromium,9 Nickel, FreeMachining0.16 1.50 2.00 0.17 0.04 18.021.0 9.012.01.50 max . 0.200.35. . . .CF16Fa 19 Chromium,9 Nickel, FreeMachining0.16 1.50 2.00 0.04 0.200.4018.021.0 9.012.00.400
45、.80 . . . . . .CF20(J92602)19 Chromium,9 Nickel0.20 1.50 2.00 0.04 0.04 18.021.0 8.011.0. . . . . . .CG3M(J92999)19 Chromium,11 Nickel, withMolybdenum0.03 1.50 1.50 0.04 0.04 18.021.0 9.013.03.04.0 . . . . . . . . . . . . . . . . . .CG6MMN(J93790)0.06 4.006.001.00 0.04 0.03 20.523.5 11.513.51.503.00
46、 0.100.30. . . 0.100.300.200.40CG8M(J93000)19 Chromium,11 Nickel, withMolybdenum0.08 1.50 1.50 0.04 0.04 18.021.0 9.013.03.04.0 . . . . . .CG12(J93001)22 Chromium,12 Nickel0.12 1.50 2.00 0.04 0.04 20.023.0 10.013.0. . . . . . .CH10(J93401)25 Chromium,12 Nickel0.10 1.50 2.00 0.04 0.04 22.026.0 12.015
47、.0. . . . . . . . .CH20(J93402)25 Chromium,12 Nickel0.20 1.50 2.00 0.04 0.04 22.026.0 12.015.0. . . . . . .CK35MN 23 Chromium, 21Nickel, withMolybdenum andNitrogen0.035 2.00 1.00 0.035 0.020 22.0-24.0 20.0-22.06.0-6.8 . . . . . . 0.40 . . . . . . 0.21-0.32CK3MCuN(J93254)20 Chromium18 Nickel, withCop
48、per andMolybdenum0.025 1.20 1.00 0.045 0.010 19.520.5 17.519.56.07.0 . . . . . . 0.501.00. . . . . . 0.1800.240CK20(J94202)25 Chromium,20 Nickel0.20 2.00 2.00 0.04 0.04 23.027.0 19.022.0. . . . . . .CN3M(J94652)0.03 2.0 1.0 0.03 0.03 20.022.0 23.027.04.55.5 . . . . . .CN3MN(J94651)21 Chromium,24 Nickel withMolybdenumand Nitrogen0.03 2.00 1.00 0.040 0.010 20.022.0 23.525.56.07.0 . . 0.75max. . 0.180.26A743/A743M 174TABLE 2 ContinuedGrade(UNS) TypeComposition, %Carbon,maxMan-ganese,maxSilicon,maxPhospho-rus, maxSulfur,max Chromium NickelMolybde-numColum-bium
