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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.
This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.
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.
188.8.131.52 MIM-2200, low-alloy steel
184.108.40.206 MIM-2700, low-alloy steel
220.127.116.11 MIM-4605, low-alloy steel
18.104.22.168 MIM-4140, low-alloy steel
22.214.171.124 MIM-316L, austenitic stainless steel
126.96.36.199 MIM-17-4 PH, precipitation hardening stainless steel
188.8.131.52 MIM-420, martensitic stainless steel
184.108.40.206 MIM-430L, ferritic stainless steel
220.127.116.11 MIM-440, martensitic stainless steel
18.104.22.168 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.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
B243 Terminology of Powder Metallurgy
B311 Test Method for Density of Powder Metallurgy (PM) Materials Containing Less Than Two Percent Porosity
B933 Test Method for Microindentation Hardness of Powder Metallurgy (PM) Materials
B962 Test Methods for Density of Compacted or Sintered Powder Metallurgy (PM) Products Using Archimedes Principle
E8 Test Methods for Tension Testing of Metallic Materials [Metric] E0008_E0008M
E18 Test Methods for Rockwell Hardness of Metallic Materials
E228 Test Method for Linear Thermal Expansion of Solid Materials With a Push-Rod Dilatometer
E350 Test Methods for Chemical Analysis of Carbon Steel, Low-Alloy Steel, Silicon Electrical Steel, Ingot Iron, and Wrought Iron
E415 Test Method for Analysis of Carbon and Low-Alloy Steel by Spark Atomic Emission Spectrometry
E1019 Test Methods for Determination of Carbon, Sulfur, Nitrogen, and Oxygen in Steel, Iron, Nickel, and Cobalt Alloys by Various Combustion and Inert Gas Fusion Techniques
E1086 Test Method for Analysis of Austenitic Stainless Steel by Spark Atomic Emission Spectrometry
E1461 Test Method for Thermal Diffusivity by the Flash Method
E1621 Guide for Elemental Analysis by Wavelength Dispersive X-Ray Fluorescence Spectrometry
F1089 Test Method for Corrosion of Surgical Instruments
MPIF StandardsMPIF Standard 50 Method for Preparing and Evaluating Metal Injection Molded (MIM) Debound and Sintered/Heat Treated Tension Test Specimens MPIF Standard 51 Method for Determination of Microindentation Hardness of Powder Metallurgy Materials MPIF Standard 59 Method for Determination of Charpy Impact Energy of Unnotched Metal Injection Molded (MIM) Test Specimens MPIF Standard 62 Method for Determination of the Corrosion Resistance of MIM Grades of Stainless Steel Immersed in 2% Sulfuric Acid Solution MPIF Standard 63 Method for Density Determination of Metal Injection Molded (MIM) Components (Gas Pycnometer)
ICS Number Code 77.140.80 (Iron and steel castings); 77.160 (Powder metallurgy)
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ASTM B883-19, Standard Specification for Metal Injection Molded (MIM) Materials, ASTM International, West Conshohocken, PA, 2019, www.astm.orgBack to Top