1、Designation: A743/A743M 06 (Reapproved 2010) A743/A743M 12Standard 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 th
2、e yearof 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.This standard has been approved for use by agencies of the Dep
3、artment of Defense.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 suitable for broad ranges of application which areintended for a wi
4、de 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 A297/A297M. For nickel alloy castings for corrosion-resistan
5、t 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 each system are not exact equivalents; therefore, each syste
6、m 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 ordered to SpecificationA743M.2. Referenced Documents2.1 ASTM Stand
7、ards: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 GeneralApplicationA370 Test Methods and Definitions for Mechanical Testing of Steel Product
8、sA494/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, Common Requirements, for General Industrial UseA890/A890M Specification for Casti
9、ngs, Iron-Chromium-Nickel-Molybdenum Corrosion-Resistant, Duplex (Austenitic/Ferritic) for General ApplicationA957 Specification for Investment Castings, Steel and Alloy, Common Requirements, for General Industrial Use3. General Conditions for Delivery3.1 Except for investment castings, castings fur
10、nished 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 thegeneral requirements of Specification A781/A781M constitutes nonconformance with this specification.
11、 In case of conflict betweenthe requirements of this specification and Specification A781/A781M, this specification shall prevail.3.2 Steel investment castings furnished to this specification shall conform to the requirements of Specification A957, includingany supplementary requirements that are in
12、dicated in the purchase order. Failure to comply with the general requirements ofSpecification A957 constitutes nonconformance with this specification. In case of conflict between the requirements of thisspecification and Specification A957, Specification A957 shall prevail.1 This specification is u
13、nder the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.18on Castings.Current edition approved Oct. 1, 2010Nov. 1, 2012. Published December 2010December 2012. Originally approved in 1977. Last previous edition appr
14、oved in 20062010as A743/A743M 06.A743/A743M 06 (2010). DOI: 10.1520/A0743_A0743M-06R10. 10.1520/A0743_A0743M-12.2 For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to th
15、e 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 ac
16、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
17、or Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14. Ordering Information4.1 Orders for material to this specification should include the following, as required, to describe the material adequately:4.1.1 Description of the casting by pattern number or drawing,4.1.2 Grade,4.1.3 H
18、eat 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, including the standards of acceptance.5. Process5.1 The steel shall be made by the electric furnace process with or without se
19、parate 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 treatment of these alloys is usually necessary to enhance corrosion resistance and in some cases to meet mechanical propertie
20、s.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 cool the castings in order to enhance the corrosion resistance and meet mechanical properties.7. Chemical Requirements7.
21、1 The chemical requirements are shown in Table 2TABLE 2 Chemical RequirementsGrade(UNS) TypeComposition, %Carbon,maxMan-ganese,maxSilicon,maxPhospho-rus, maxSulfur,max Chromium NickelMolybde-numColum-biumSele-nium CopperTung-sten,maxVana-dium,maxNitrogenCF8(J92600)19 Chromium, 0.08 1.50 2.00 0.04 0.
22、04 18.021.0 8.0 . . . . . . .9 Nickel 11.0CG12(J93001)22 Chromium, 0.12 1.50 2.00 0.04 0.04 20.023.0 10.0 . . . . . . .12 Nickel 13.0CF20(J92602)19 Chromium, 0.20 1.50 2.00 0.04 0.04 18.021.0 8.0 . . . . . . .9 Nickel 11.0CF8M(J92900)19 Chromium, 0.08 1.50 2.00 0.04 0.04 18.021.0 9.0 2.03.0 . . . .
23、. .10 Nickel, withMolybdenum12.0CF8C(J92710)19 Chromium, 0.08 1.50 2.00 0.04 0.04 18.021.0 9.0 . A . . . . .10 Nickel, withColumbium12.0CF16F(J92701)19 Chromium, 0.16 1.50 2.00 0.17 0.04 18.021.0 9.0 1.50 max . 0.20 . . . .9 Nickel, FreeMachining12.0 0.35CF16Fa 19 Chromium, 0.16 1.50 2.00 0.04 0.20
24、18.021.0 9.0 0.400.80 . . . . . .9 Nickel, FreeMachining0.40 12.0CH10(J93401)25 Chromium, 0.10 1.50 2.00 0.04 0.04 22.026.0 12.0 . . . . . . . . .12 Nickel 15.0CH20(J93402)25 Chromium, 0.20 1.50 2.00 0.04 0.04 22.026.0 12.0 . . . . . . .12 Nickel 15.0CK20(J94202)25 Chromium, 0.20 2.00 2.00 0.04 0.04
25、 23.027.0 19.0 . . . . . . .20 Nickel 22.0CE30(J93423)29 Chromium, 0.30 1.50 2.00 0.04 0.04 26.030.0 8.0 . . . . . . .9 Nickel 11.0CA15(J91150)12 Chromium 0.15 1.00 1.50 0.04 0.04 11.514.0 1.00 0.50 max . . . . . .maxCA15M(J91151)12 Chromium 0.15 1.00 0.65 0.040 0.040 11.514.0 1.0 0.151.0 . . . . .
26、.maxA743/A743M 122TABLE 2 ContinuedGrade(UNS) TypeComposition, %Carbon,maxMan-ganese,maxSilicon,maxPhospho-rus, maxSulfur,max Chromium NickelMolybde-numColum-biumSele-nium CopperTung-sten,maxVana-dium,maxNitrogenCB30(J91803)20 Chromium 0.30 1.00 1.50 0.04 0.04 18.021.0 2.00 . . . B . . .maxCC50(J926
27、15)28 Chromium 0.50 1.00 1.50 0.04 0.04 26.030.0 4.00 . . . . . . .maxCA40(J91153)12 Chromium 0.20 1.00 1.50 0.04 0.04 11.514.0 1.0 0.5 max . . . . . .TABLE 1 Heat Treatment RequirementsGrade Heat TreatmentCF8, CG3M, CG8M, CG12, CF20,CF8M, CF8C,CF16F, CF16FaHeat to 1900F 1040C minimum, hold for suff
28、icient time to heat casting to temperature, quench in water or rapidcool by other means.CA6N 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.CH10, CH20, CE30, CK20 Heat to 2000F 1
29、093C minimum, hold for sufficient time to heat casting to temperature, quench in water or rapidcool by other means.CA6NM Heat to 1850F 1010C minimum, air cool to 200F 95C or lower prior to any optional intermediate temper andprior to the final temper. The final temper shall be between 1050F 565C and
30、 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 10251050C, quench in air or oil, and temper at 1150F 620C minimum, or(2) Anneal at 1400F 760C minimum.CB30, CC50 (1) Heat t
31、o 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 temperbetween 1100F and 1160F 595C and 625C.CE30, CH10, CH20, CK20 Heat to 2000F 1093C minimum, hold for sufficient time to he
32、at 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, and cool rapidly.(2) As cast if corrosion resistance is acceptable.CN3M Heat to 2150F 1175C minimum, hold for sufficient t
33、ime to heat casting to temperature, quench in water or rapidcool by other means.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.CN3MN Heat to 2100F 1150C minimum, ho
34、ld for sufficient time to heat casting to temperature, quench in water or rapidcool by other means.CF10SMnN Heat to 1950F 1065C minimum, hold for sufficient time to heat casting to temperature, quench in water or rapidcool by other means.CN7M, CG6MMN Heat to 2050F 1120C minimum, hold for sufficient
35、time to heat casting to temperature, quench in water or rapidcool by other means.CG6MMN, CN7M Heat to 2050F 1120C minimum, hold for sufficient 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
36、time (2 h minimum) to heatcasting to temperature and quench in water.CK3MCuN Heat to 2100F 1150C minimum, hold for sufficient time to heat casting to temperature, quench in wateror rapid cool by other means.CA6NM Heat to 1850F 1010C minimum, air cool to 200F 95C or lower prior to any optional interm
37、ediate temper andprior to the final temper. The final temper shall be between 1050F 565C and 1150F 620C.CA6N 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.CK35MN Heat to 2100-21
38、90F 1150-1200C, hold for sufficient time to heat casting to temperature, quench in water or rapidcool by other means.CF10SMnN Heat to 1950F 1065C minimum, hold for sufficient time to heat casting to temperature, quench in water or rapidcool by other means.CN3M Heat to 2150F 1175C minimum, hold for s
39、ufficient time to heat casting to temperature, quench in water or rapidcool by other means.CA28MWV (1) Heat to 18751925F 10251050C, quench in air or oil, and temper at 1150F 620C minimum, or(2) Anneal at 1400F 760C minimum.CK3MCuN Heat to 2100F 1150C minimum, hold for sufficient time to heat casting
40、 to temperature, quench in water or rapidcool by other means.CN3MN Heat to 2100F 1150C minimum, hold for sufficient time to heat casting to temperature, quench in water or rapidcool by other means.CK35MN Heat to 2100-2190F 1150-1200C, hold for sufficient time to heat casting to temperature, quench i
41、n 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.CB6 Heat between 1800F 980C and 1920F 1050C, forced air, cool to 120F 50C maximum, and temperbetween 1100F and 1160F 59
42、5C and 625C.A743/A743M 123TABLE 2 ContinuedGrade(UNS) TypeComposition, %Carbon,maxMan-ganese,maxSilicon,maxPhospho-rus, maxSulfur,max Chromium NickelMolybde-numColum-biumSele-nium CopperTung-sten,maxVana-dium,maxNitrogen0.40 maxCA40F(J91154)12 Chromium, 0.20 1.00 1.50 0.04 0.20 11.514.0 1.0 0.5 max
43、. . . . . .Free Machining 0.40 0.40 maxCF3(J92500)19 Chromium, 0.03 1.50 2.00 0.04 0.04 17.021.0 8.0 . . . . . . .9 Nickel 12.0CF10SMnN(J92972)17 Chromium, 8.5Nickel withNitrogen0.10 7.009.003.504.500.060 0.030 16.018.0 8.09.0. . . . . . 0.080.18CF3M(J92800)19 Chromium, 0.03 1.50 1.50 0.04 0.04 17.0
44、21.0 9.0 2.03.0 . . . . . .10 Nickel, withMolybdenum13.0CF3MN(J92804)19 Chromium,10 Nickel, withMolybdenum, andNitrogen0.03 1.50 1.50 0.040 0.040 17.022.0 9.013.02.03.0 . . . . . 0.100.20CG6MMN(J93790)0.06 4.006.001.00 0.04 0.03 20.523.5 11.513.51.503.00 0.100.30. . . 0.100.300.200.40CG3M(J92999)19
45、Chromium,11 Nickel, withMolybdenum0.03 1.50 1.50 0.04 0.04 18.021.0 9.013.03.04.0 . . . . . . . . . . . . . . . . . .CG8M(J93000)19 Chromium, 0.08 1.50 1.50 0.04 0.04 18.021.0 9.0 3.04.0 . . . . . .11 Nickel, withMolybdenum13.0CN3M(J94652)0.03 2.0 1.0 0.03 0.03 20.022.0 23.027.04.55.5 . . . . . .CN3
46、MN(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. . 0.180.26CN7M(N08007)20 Chromium, 0.07 1.50 1.50 0.04 0.04 19.022.0 27.5 2.03.0 . . 3.0 . . .29 Nickel, withCopper andMolybdenum30.5 4.0CN7MS(J94650)19 Chromium, 0.07 1.00 2.50
47、0.04 0.03 18.020.0 22.0 2.53.0 . . 1.5 .24 Nickel, withCopper andMolybdenum3.50 25.0 2.0CA6NM(J91540)12 Chromium, 0.06 1.00 1.00 0.04 0.03 11.514.0 3.5 0.401.0 . . . . . .4 Nickel 4.5CA6N 11 Chromium, 0.06 0.50 1.00 0.02 0.02 10.512.5 6.0 . . . . . . .7 Nickel 8.0CA28MWV(J91422)12 Chromium, withMoly
48、bdenum,Tungsten andVanadium0.200.280.501.001.0 0.030 0.030 11.012.5 0.501.000.901.25 . . . 0.901.250.200.30.CK3MCuN(J93254)20 Chromium18 Nickel, withCopper andMolybdenum0.025 1.20 1.00 0.045 0.010 19.520.5 17.519.56.07.0 . . . . . . 0.501.00. . . . . . 0.1800.240CK35MN 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 . . . . . . 0.21-0.32CB6(J91804)16 Chromium,4 Nickel0.06 1.00 1.00 0.04 0.03 15.517.5 3.55.5 0.5 max . . . . . . . . . . . . . . . . . .A Grade CF8C shall have a columbium
