ASTM-B883 › Standard Specification for Metal Injection Molded (MIM) Materials
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This specification covers ferrous metal injection molded (MIM) materials fabricated by mixing elemental or pre-alloyed metal powders with binders, injecting into a mold, debinding, and sintering with or without subsequent heat treatment. These materials are: low-alloy steel produced from admixtures of iron powder and other alloying elements such as nickel and molybdenum (MIM-2200 and MIM-2700); low-alloy steel produced from admixtures of iron powder and other alloying elements such as nickel, molybdenum, and carbon (MIM-4605); austenitic stainless steel produced from pre-alloyed powder or an admixture of powders (MIM-316L); precipitation hardening stainless steel produced from pre-alloyed powder or an admixture of powders (MIM-17-4 PH); and ferritic stainless steel produced from pre-alloyed powder or an admixture of powders (MIM-430L). Chemical analysis shall be performed for the elements copper, chromium, molybdenum, and nickel. The materials shall be subjected to tensile test and unnotched Charpy impact energy test.
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1.1 This specification covers ferrous metal injection molded materials fabricated by mixing elemental or pre-alloyed metal powders with binders, injecting into a mold, debinding, and sintering, with or without subsequent heat treatment.
1.2 This specification covers the following injection molded materials.
22.214.171.124 MIM-2200, low-alloy steel
126.96.36.199 MIM-2700, low-alloy steel
188.8.131.52 MIM-4605, low-alloy steel
184.108.40.206 MIM-4140, low-alloy steel
220.127.116.11 MIM-316L, austenitic stainless steel
18.104.22.168 MIM-17-4 PH, precipitation hardening stainless steel
22.214.171.124 MIM-420, martensitic stainless steel
126.96.36.199 MIM-430L, ferritic stainless steel
188.8.131.52 MIM-440, martensitic stainless steel
184.108.40.206 MIM-Cu, copper
1.3 Chemical composition limits are specified in .
1.4 With the exception of the values for density and the mass used to determine density, for which the use of the gram per cubic centimetre (g/cm3) and gram (g) units is the longstanding industry practice, the values in inch-pound units are to be regarded as standard. The values given in parentheses or in separate tables are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
coefficient of thermal expansion; corrosion resistance; low-alloy steels; mechanical properties; metal injection molded parts; metal injection molded steels; metal injection molding (MIM); metal powders; MIM; PIM; powder injection molding; sintered steels; stainless steels; thermal conductivity; unnotched Charpy impact energy;; ICS Number Code 77.140.80 (Iron and steel castings); 77.160 (Powder metallurgy)
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May 8, 2019