1、Standard Specification for Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant, for General Application AASHTO Designation: M 163M/M 163-07 (2016) Release: Group 2 (June 2016) ASTM Designation: A743/A743M-06 American Association of State Highway and Transportation Officials 444 North
2、Capitol Street N.W., Suite 249 Washington, D.C. 20001 TS-4h M 163M/M 163-1 AASHTO Standard Specification for Castings, Iron-Chromium, Iron-Chromium-Nickel, Corrosion Resistant, for General Application AASHTO Designation: M 163M/M 163-07 (2016)1Release: Group 2 (June 2016) ASTM Designation: A743/A743
3、M-06 1. SCOPE 1.1. This specification covers iron-chromium and iron-chromium-nickel alloy castings for general corrosion-resistant application. The grades covered by this specification represent types of alloy castings suitable for broad ranges of application, which are intended for a wide variety o
4、f corrosion environments. Note 1For alloy castings for severe corrosion-resistant service, reference should be made to M 285M/M 285. For general heat-resistant alloy castings, reference should be made to ASTM A297/A297M. For nickel alloy castings for corrosion-resistant service, reference should be
5、made to ASTM A494/A494M. 1.2. The values stated either in SI units or inch-pound units are to be regarded separately as standard. Within the text, the inch-pound units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently
6、 of the other. Combining values from the two systems may result in nonconformance with the specification. SI units are applicable for material ordered to M 163M and inch-pound units are applicable for material ordered to M 163. 2. REFERENCED DOCUMENTS 2.1. AASHTO Standards: M 285M/M 285, Castings, I
7、ron-Chromium-Nickel, Corrosion Resistant, for Severe Service T 244, Mechanical Testing of Steel Products 2.2. ASTM Standards: A262, Standard Practices for Detecting Susceptibility to Intergranular Attack in Austenitic Stainless Steels A297/A297M, Standard Specification for Steel Castings, Iron-Chrom
8、ium and Iron-Chromium-Nickel, Heat Resistant, for General Application A447/A447M, Standard Specification for Steel Castings, Chromium-Nickel-Iron Alloy (25-12 Class), for High-Temperature Service A494/A494M, Standard Specification for Castings, Nickel and Nickel Alloy A781/A781M, Standard Specificat
9、ion for Castings, Steel and Alloy, Common Requirements, for General Industrial Use 2016 by the American Association of State Highway and Transportation Officials. All rights reserved. Duplication is a violation of applicable law.TS-4h M 163M/M 163-2 AASHTO A890/A890M, Standard Specification for Cast
10、ings, Iron-Chromium-Nickel-Molybdenum Corrosion-Resistant, Duplex (Austenitic/Ferritic) for General Application A957/A957M, Standard Specification for Investment Castings, Steel and Alloy, Common Requirements, for General Industrial Use E527, Standard Practice for Numbering Metals and Alloys in the
11、Unified Numbering System (UNS) 3. GENERAL CONDITIONS FOR DELIVERY 3.1. Except for investment castings, castings furnished to this specification shall conform to the requirements of ASTM A781/A781M, including any supplementary requirements that are indicated on the purchase order. Failure to comply w
12、ith the general requirements of ASTM A781/A781M constitutes nonconformance with this specification. In case of conflict between the requirements of this specification and ASTM A781/A781M, this specification shall prevail. 3.2. Steel investment castings furnished to this specification shall conform t
13、o the requirements of ASTM A957/A957M, including any supplementary requirements that are indicated in the purchase order. Failure to comply with the general requirements of ASTM A957/A957M constitutes nonconformance with this specification. In case of conflict between the requirements of this specif
14、ication and ASTM A957/A957M, this specification shall prevail. 4. ORDERING INFORMATION 4.1. 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
15、eat treatment, 4.1.4. Options in the specification, 4.1.5. Whether castings are to be produced using the investment casting process, and 4.1.6. Supplementary requirements desired, including the standards of acceptance. 5. PROCESS 5.1. The steel shall be made by the electric furnace process with or w
16、ithout separate refining such as argon-oxygen decarburization (AOD). 6. HEAT TREATMENT 6.1. 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 mech
17、anical properties. Minimum heat-treat temperatures are specified; however, it is sometimes necessary to heat treat at higher temperatures, hold for some minimum time at temperature, and then rapidly cool the castings in order to enhance the corrosion resistance and meet mechanical properties. 2016 b
18、y the American Association of State Highway and Transportation Officials. All rights reserved. Duplication is a violation of applicable law.TS-4h M 163M/M 163-3 AASHTO Table 1Heat Treatment Requirements Grade Heat Treatment CF8, CG3M, CG8M, CG12, CF20, CF8M, CF8C, CF16F, CF16Fa Heat to 1040C 1900F m
19、inimum, hold for sufficient time to heat casting to temperature, quench in water or rapid cool by other means. CH10, CH20, CE30, CK20 Heat to 1093C 2000F minimum, hold for sufficient time to heat casting to temperature, quench in water or rapid cool by other means. CA15, CA15M, CA40, CA40F (1) Heat
20、to 955C 1750F minimum, air cool and temper at 595C 1100F minimum, or (2) Anneal at 790C 1450F minimum. CB30, CC50 (1) Heat to 790C 1450F minimum, and air cool, or (2) Heat to 790C 1450F minimum, and furnace cool. CF3, CF3M, CF3MN (1) Heat to 1040C 1900F minimum, hold for sufficient time to heat cast
21、ing to temperature, and cool rapidly. (2) As cast if corrosion resistance is acceptable. CN3M Heat to 1175C 2150F minimum, hold for sufficient time to heat casting to temperature, quench in water or rapid cool by other means. CN3MN Heat to 1150C 2100F minimum, hold for sufficient time to heat castin
22、g to temperature, quench in water or rapid cool by other means. CN7M, CG6MMN Heat to 1120C 2050F minimum, hold for sufficient time to heat casting to temperature, quench in water or rapid cool by other means. CN7MS Heat to 1150C 2100F minimum, 1180C 2150F maximum, hold for sufficient time (two-hour
23、minimum) to heat casting to temperature and quench in water. CA6NM Heat to 1010C 1850F minimum, air cool to 95C 200F or lower prior to any optional intermediate temper and prior to the final temper. The final temper shall be between 565C 1050F and 620C 1150F. CA6N Heat to 1040C 1900F, air cool, rehe
24、at to 815C 1500F, air cool, and age at 425C 800F, holding at each temperature sufficient time to heat casting uniformly to temperature. CF10SMnN Heat to 1065C 1950F minimum, hold for sufficient time to heat casting to temperature, quench in water or rapid cool by other means. CA28MWV (1) Heat to 102
25、51050C 18751925F, quench in air or oil and temper at 620C 1150F minimum, or (2) Anneal at 760C 1400F minimum. CK3MCuN Heat to 1150C 2100F minimum, hold for sufficient time to heat casting to temperature, quench in water or rapid cool by other means. CK35MN Heat to 11501200C 21002190F, hold for suffi
26、cient time to heat casting to temperature, quench in water or rapid cool by other means. CB6 Heat between 980C 1800F and 1050C 1920F, forced air, cool to 50C 120F maximum, and temper between 595C and 625C 1100F and 1160F. 7. CHEMICAL REQUIREMENTS 7.1. The chemical requirements are shown in Table 2.
27、2016 by the American Association of State Highway and Transportation Officials. All rights reserved. Duplication is a violation of applicable law.Table 2Chemical Requirements Grade (UNS) Type Composition, % Carbon, Max Man- ganese, Max Silicon, Max Phos- phorus, Max Sulfur, Max Chro- mium Nickel Mol
28、yb- denum Colum-bium Sele- nium Copper Tungsten, Max Vana- dium, Max Nitrogen CF8 (J92600) 19 Chromium, 9 Nickel 0.08 1.50 2.00 0.04 0.04 18.021.0 8.011.0 CG12 (J93001) 22 Chromium, 12 Nickel 0.12 1.50 2.00 0.04 0.04 20.023.0 10.013.0 CF20 (J92602) 19 Chromium, 9 Nickel 0.20 1.50 2.00 0.04 0.04 18.0
29、21.0 8.011.0 CF8M (J92900) 19 Chromium, 10 Nickel with Molybdenum 0.08 1.50 2.00 0.04 0.04 18.021.0 9.012.0 2.03.0 CF8C (J92710) 19 Chromium, 10 Nickel with Columbium 0.08 1.50 2.00 0.04 0.04 18.021.0 9.012.0 a CF16F (J92701) 19 Chromium, 9 Nickel, Free Machining 0.16 1.50 2.00 0.17 0.04 18.021.0 9.
30、012.0 1.50 max 0.200.35 CF16Fa 19 Chromium, 9 Nickel, Free Machining 0.16 1.50 2.00 0.04 0.200.40 18.021.0 9.012.0 0.400.80 CH10 (J93401) 25 Chromium, 12 Nickel 0.10 1.50 2.00 0.04 0.04 22.026.0 12.015.0 CH20 (J93402) 25 Chromium, 12 Nickel 0.20 1.50 2.00 0.04 0.04 22.026.0 12.015.0 CK20 (J94202) 25
31、 Chromium, 20 Nickel 0.20 2.00 2.00 0.04 0.04 23.027.0 19.022.0 CE30 (J93423) 29 Chromium, 9 Nickel 0.30 1.50 2.00 0.04 0.04 26.030.0 8.011.0 CA15 (J91150) 12 Chromium 0.15 1.00 1.50 0.04 0.04 11.514.0 1.00 max 0.50 max CA15M (J91151) 12 Chromium 0.15 1.00 0.65 0.040 0.040 11.514.0 1.0 max 0.151.0 C
32、B30 (J91803) 20 Chromium 0.30 1.00 1.50 0.04 0.04 18.021.0 2.00 max b CC50 (J92615) 28 Chromium 0.50 1.00 1.50 0.04 0.04 26.030.0 4.00 max CA40 (J91153) 12 Chromium 0.200.40 1.00 1.50 0.04 0.04 11.514.0 1.0 max 0.50 max CA40F (J91154) 12 Chromium, Free Machining 0.200.40 1.00 1.50 0.04 0.200.40 11.5
33、14.0 1.0 max 0.50 max CF3 (J92500) 19 Chromium, 9 Nickel 0.03 1.50 2.00 0.04 0.04 17.021.0 8.012.0 Continued on next page. TS-4hM 163M/M 163-4AASHTO 2016 by the American Association of State Highway and Transportation Officials. All rights reserved. Duplication is a violation of applicable law.Table
34、 2Chemical Requirements (Continued) Grade (UNS) Type Composition, % Carbon, Max Man- ganese, Max Silicon, Max Phos- phorus, Max Sulfur, Max Chro- mium Nickel Molyb- denum Colum-bium Sele- nium Copper Tungsten, Max Vana- dium, Max Nitrogen CF10SMnN (J92972) 17 Chromium, 8.5 Nickel with Nitrogen 0.10
35、7.009.00 3.504.50 0.060 0.030 16.018.0 8.09.0 0.080.18 CF3M (J92800) 19 Chromium, 10 Nickel with Molybdenum 0.03 1.50 1.50 0.04 0.04 17.021.0 9.013.0 2.03.0 CF3MN (J92804) 19 Chromium, 10 Nickel with Molybdenum and Nitrogen 0.03 1.50 1.50 0.040 0.040 17.022.0 9.013.0 2.03.0 0.100.20 CG6MMN (J93790)
36、0.06 4.006.00 1.00 0.04 0.03 20.523.5 11.513.5 1.503.00 0.100.30 0.100.30 0.200.40 CG3M (J92999) 19 Chromium, 11 Nickel with Molybdenum 0.03 1.50 1.50 0.04 0.04 18.021.0 9.013.0 3.04.0 CG8M (J93000) 19 Chromium, 11 Nickel with Molybdenum 0.08 1.50 1.50 0.04 0.04 18.021.0 9.013.0 3.04.0 CN3M (J94652)
37、 0.03 2.0 1.0 0.03 0.03 20.022.0 23.027.0 4.55.5 CN3MN (J94651) 21 Chromium, 24 Nickel with Molybdenum and Nitrogen 0.03 2.00 1.00 0.040 0.010 20.022.0 23.525.5 6.07.0 0.75 max 0.180.26 CN7M (N08007) 20 Chromium, 29 Nickel with Copper and Molybdenum 0.07 1.50 1.50 0.04 0.04 19.022.0 27.530.5 2.03.0
38、3.04.0 CN7MS (J94650) 19 Chromium, 24 Nickel with Copper and Molybdenum 0.07 1.00 2.503.50 0.04 0.03 18.020.0 22.025.0 2.53.0 1.52.0 CA6NM (J91540) 12 Chromium, 4 Nickel 0.06 1.00 1.00 0.04 0.03 11.514.0 3.54.5 0.401.0 CA6N (J91541) 11 Chromium, 7 Nickel 0.06 0.50 1.00 0.02 0.02 10.512.5 6.08.0 CA28
39、MWV (J91422) 12 Chromium with Molybdenum, Tungsten and Vanadium 0.200.28 0.501.00 1.0 0.030 0.030 11.012.5 0.501.00 0.901.25 0.901.25 0.200.30 CK3MCuN J93254) 20 Chromium, 18 Nickel with Copper and Molybdenum 0.025 1.20 1.00 0.045 0.010 19.520.5 17.519.5 6.07.0 0.501.0 0.1800.240 Continued on next p
40、age. TS-4hM 163M/M 163-5AASHTO 2016 by the American Association of State Highway and Transportation Officials. All rights reserved. Duplication is a violation of applicable law.Table 2 Chemical Requirements (Continued) Grade (UNS) Type Composition, % Carbon, Max Man- ganese, Max Silicon, Max Phos- p
41、horus, Max Sulfur, Max Chro- mium Nickel Molyb- denum Colum-bium Sele- nium Copper Tungsten, Max Vana- dium, Max Nitrogen CK35MN 23 Chromium, 21 Nickel with Molybdenum and Nitrogen 0.035 2.00 1.00 0.035 0.020 22.024.0 20.022.0 6.06.8 0.40 0.210.32 CB6 (J91804) 16 Chromium, 4 Nickel 0.06 1.00 1.00 0.
42、04 0.03 15.517.5 3.55.5 0.5 max aGrade CF8C shall have a columbium content of not less than eight times the carbon content and not more than 1.0 percent. If a columbium-plus tantalum alloy in the approximate Cb:Ta ratio of 3:1 is used for stabilizing this grade, the total columbium plus tantalum con
43、tent shall not be less than nine times the carbon content and shall not exceed 1.1 percent. bFor grade CB30, a copper content of 0.90 to 1.20 percent is optional. Note: CD4MCu has been deleted from M 163M/M 163 and added to ASTM A890/A890M. CD4MCu may now be supplied and purchased in compliance with
44、 ASTM A890/A890M. The chemical and mechanical property requirements of CD4MCu were identical in M 163M/M 163 and ASTM A890/A890M at the time of removal from M 163M/M 163. TS-4hM 163M/M 163-6AASHTO 2016 by the American Association of State Highway and Transportation Officials. All rights reserved. Du
45、plication is a violation of applicable law.TS-4h M 163M/M 163-7 AASHTO 8. REPAIR BY WELDING 8.1. Repair welding of Grade CA28MWV is not permitted unless by agreement between the manufacturer and the purchaser. 8.2. When methods involving high temperature are used in the removal of discontinuities, c
46、astings shall be preheated in accordance with Table 3. Weld repairs shall be subject to the same quality standards as are used to inspect the castings. Table 3Minimum Preheat Temperatures Grade Minimum Preheat Temperature C F CA15, CA15M 205 400 CA40, CA28MWV 205 400 Others 10 50 8.3. Postweld heat
47、treatment, if required, shall be in accordance with Table 1. 8.3.1. The martensitic grades CA6NM, CA15, CA15M, CB6, and CA40 shall be retempered after weld repairing except that local tempering will be permitted if, in the opinion of the manufacturer, furnace heat treating will be damaging to the finished surface of a machined casting. Heat treatment, other than tempering, of grades CA6NM, CA15, CA15M, CB6, and CA40 after weld repairing shall be performed only when agreed on between the manufacturer and the purchaser. Weld
