1、Designation: A743/A743M 13a1Standard 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 adoption or,
2、 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 Defense.1NOTET
3、able 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-resistantapplication. The grades covered by this specification representtypes of alloy castings suitable for broad rang
4、es of applicationwhich are intended for a wide variety of corrosion environ-ments.NOTE 1For alloy castings for severe corrosion-resistant service,reference should be made to Specification A744/A744M. For generalheat-resistant alloy castings, reference should be made to SpecificationA297/A297M. For n
5、ickel alloy castings for corrosion-resistant service,reference should be made to Specification A494/A494M.1.2 The values stated in either inch-pound units or SI unitsare to be regarded separately as standard. Within the text, theSI units are shown in brackets. The values stated in eachsystem are not
6、 exact equivalents; therefore, each system mustbe used independently of the other. Combining values from thetwo systems may result in nonconformance with the specifi-cation. Inch-pound units are applicable for material ordered toSpecification A743 and SI units for material ordered toSpecification A7
7、43M.2. Referenced Documents2.1 ASTM Standards:2A262 Practices for Detecting Susceptibility to IntergranularAttack in Austenitic Stainless SteelsA297/A297M Specification for Steel Castings, Iron-Chromium and Iron-Chromium-Nickel, Heat Resistant,for General ApplicationA370 Test Methods and Definitions
8、 for Mechanical Testingof Steel ProductsA494/A494M Specification for Castings, Nickel and NickelAlloyA744/A744M Specification for Castings, Iron-Chromium-Nickel, Corrosion Resistant, for Severe ServiceA781/A781M Specification for Castings, Steel and Alloy,Common Requirements, for General Industrial
9、UseA890/A890M Specification for Castings, Iron-Chromium-Nickel-Molybdenum Corrosion-Resistant, Duplex(Austenitic/Ferritic) for General ApplicationA957 Specification for Investment Castings, Steel andAlloy,Common Requirements, for General Industrial Use3. General Conditions for Delivery3.1 Except for
10、 investment castings, castings furnished tothis specification shall conform to the requirements of Speci-fication A781/A781M, including any supplementary require-ments that are indicated on the purchase order. Failure tocomply with the general requirements of Specification A781/A781M constitutes non
11、conformance with this specification. Incase of conflict between the requirements of this specificationand Specification A781/A781M, this specification shall pre-vail.3.2 Steel investment castings furnished to this specificationshall conform to the requirements of Specification A957,including any sup
12、plementary requirements that are indicated inthe purchase order. Failure to comply with the general require-ments of Specification A957 constitutes nonconformance withthis specification. In case of conflict between the requirementsof this specification and Specification A957, SpecificationA957 shall
13、 prevail.4. Ordering Information4.1 Orders for material to this specification should includethe following, as required, to describe the material adequately:4.1.1 Description of the casting by pattern number ordrawing,4.1.2 Grade,1This specification is under the jurisdiction of ASTM Committee A01 on
14、Steel,Stainless Steel and Related Alloys and is the direct responsibility of SubcommitteeA01.18 on Castings.Current edition approved May 15, 2013. Published June 2013. Originallyapproved in 1977. Last previous edition approved in 2013 as A743/A743M 13.DOI: 10.1520/A0743_A0743M-13AE01.2For referenced
15、 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.*A Summary of Changes section appears at the end of this standardCopyright A
16、STM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States14.1.3 Heat treatment,4.1.4 Options in the specification,4.1.5 Whether castings are to be produced using the invest-ment casting process, and4.1.6 Supplementary requirements desired, including thest
17、andards of acceptance.5. Process5.1 The steel shall be made by the electric furnace processwith or without separate refining such as argon-oxygen decar-burization (AOD).6. Heat Treatment6.1 Castings shall be heat treated in accordance with therequirements in Table 1.NOTE 2Proper heat treatment of th
18、ese alloys is usually necessary toenhance corrosion resistance and in some cases to meet mechanicalproperties. Minimum heat treat temperatures are specified; however, it issometimes necessary to heat treat at higher temperatures, hold for someminimum time at temperature and then rapidly cool the cas
19、tings in orderto 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,maxChromium NickelMolybde-num
20、Colum-biumSele-niumCopperTung-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 11.514.0 1.00max0.5
21、0 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.TABLE 1 Heat Treatment RequirementsGrade Heat Treatme
22、ntCA6N 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 lower prior to any optional intermediate temper andprior to the f
23、inal 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 10251050C, quench in air or oil, and temper at 1150F 620C mini
24、mum, 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 temperbetween 1100F and 1160F 595C and 625C.CE30, CH10, CH20, CK2
25、0 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, quench in water orrapid cool by other means.(2) As cast if co
26、rrosion 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 1065C minimum, hold for sufficient time to heat casting to te
27、mperature, 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 sufficient time to heat casting to temperature, quench in water o
28、r 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-castA743/A743M 13a12TABLE 2 ContinuedGrade(UNS)TypeComposition, %Carbon,maxMan-ganese,maxSilicon,maxPhospho-rus, maxS
29、ulfur,maxChromium NickelMolybde-numColum-biumSele-niumCopperTung-sten,maxVana-dium,maxNitrogenCA40(J91153)12 Chromium 0.200.401.00 1.50 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 Ch
30、romium,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 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. . . . . . .CE30(J93423)29 Chromium,9 Nickel0.30 1.50 2.00
31、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 . . . . . .CF3MN(J92804)19 Chromium,10 Nickel, withMolybdenum, andNitrogen0.03
32、1.50 1.50 0.040 0.040 17.022.0 9.013.02.03.0 . . . . . 0.100.20CF8(J92600)19 Chromium,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, withMolybdenum0.0
33、8 1.50 2.00 0.04 0.04 18.021.0 9.012.02.03.0 . . . . . .CF10SMnN(J92972)17 Chromium, 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
34、Chromium,9 Nickel, FreeMachining0.16 1.50 2.00 0.04 0.200.4018.021.0 9.012.00.400.80 . . . . . .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 . . . . . . . . . . .
35、 . . . . . . .CG6MMN(J93790)0.06 4.006.001.00 0.04 0.03 20.523.5 11.513.51.503.00 0.100.30. . . 0.100.300.200.40CG8M(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. . .
36、 . . . .CH10(J93401)25 Chromium,12 Nickel0.10 1.50 2.00 0.04 0.04 22.026.0 12.015.0. . . . . . . . .A743/A743M 13a13TABLE 2 ContinuedGrade(UNS)TypeComposition, %Carbon,maxMan-ganese,maxSilicon,maxPhospho-rus, maxSulfur,maxChromium NickelMolybde-numColum-biumSele-niumCopperTung-sten,maxVana-dium,maxN
37、itrogenCH20(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, withCopper andMolyb
38、denum0.025 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 withMoly
39、bdenumand 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,29 Nickel, withCopper andMolybdenum0.07 1.50 1.50 0.04 0.04 19.022.0 27.530.52.03.0 . . 3.04.0. . .CN7MS(J94650)19 Chromium,24 Nickel, withCopper andMolybdenum0.07 1.00 2.503.500.04 0.
40、03 18.020.0 22.025.02.53.0 . . 1.52.0.HG10MNNJ9260419 Chromium,12 Nickel,4 Manganese0.070.113.05.00.70 0.040 0.030 18.5 20.511.513.50.250.45C. 0.50 . . 0.200.30AGrade CF8C shall have a columbium content of not less than eight times the carbon content and not more than 1.0%. If a columbium-plus-tanta
41、lum alloy in theapproximate Cb:Ta ratio of 3:1 is used for stabilizing this grade, the total columbium-plus-tantalum content shall not be less than nine times the carbon content and shallnot exceed 1.1%.BFor Grade CB30 a copper content of 0.90 to 1.20% is optional.CGrade HG10MNN shall have a columbi
42、um content of not less than eight times the carbon, but not over 1.00 %.8. Repair by Welding8.1 Repair welding of Grade CA28MWV is not permittedunless by agreement between the manufacturer and the pur-chaser.8.2 When methods involving high temperature are used inthe removal of discontinuities, casti
43、ngs shall be preheated inaccordance with Table 3. Weld repairs shall be subject to thesame quality standards as are used to inspect the castings.8.3 Post weld heat treatment, if required, shall be in accor-dance with Table 1.8.3.1 The martensitic grades CA6NM, CA15, CA15M,CB6, and CA40 shall be rete
44、mpered after weld repairing,except that local tempering will be permitted if, in the opinionof the manufacturer, furnace heat treating will be damaging tothe finished surface of a machined casting. Heat treatment,other than tempering, of grades CA6NM, CA15, CA15M,CB6, and CA40 after weld repairing s
45、hall be performed onlywhen agreed upon between the manufacturer and the pur-chaser. Weld repair on Grade CA40F is not recommendedbecause of the risk of local hardening and possible cracking inthe heat affected zone.8.3.2 Post weld heat treatment is not required on the othergrades of this specificati
46、on. When post weld heat treatment isbelieved necessary for adequate corrosion resistance in theservice environment, castings should be ordered in accordancewith Specification A744/A744M.8.3.3 For Grade HG10MNN, the filler metal to be used shallbe established by mutual agreement between the manufactu
47、rerand the purchaser.9. Product Marking9.1 Castings shall be marked for material identification withthe ASTM specification number (A743/A743M) and gradeTABLE 3 Minimum Preheat TemperaturesGrade Minimum Preheat TemperaturesF CCA15, CA15M 400 205CA28MWV, CA40Others 50 10A743/A743M 13a14symbol, that is
48、, CF8, CA15, CB30, etc. In addition, themanufacturers name or identification mark and the patternnumber shall be cast or stamped using the low-stress stamps onall castings. Small-size castings may be such that marking mustbe limited consistent with the available area. The marking ofheat numbers on i
49、ndividual castings shall be agreed uponbetween the manufacturer and the purchaser. Marking shall bein such position as not to injure the usefulness of the casting.10. Keywords10.1 corrosion resistant; iron-chromium; iron-chromium-nickel; steel castingsSUPPLEMENTARY REQUIREMENTSThe following supplementary requirements shall not apply unless specified in
