1
MPIF Standard 35
Materials
Standards
for
Metal
Injection
Molded
Parts*
*See MPIF Standard 35,
Materials Standards for PM
Structural Parts for structural
parts made by the powder
metallurgy (PM) process.
*See MPIF Standard 35,
Materials Standards for PM
Self-Lubricating Bearings for
bearings and bushings made by
the PM process.
*See MPIF Standard 35,
Materials Standards for P/F
Steel Parts for steel
components made by the
powder forging (PF) process.
Table of Contents—2016 Edition
EXPLANATORY NOTES AND DEFINITIONS
Minimum Value Concept .................................................................................. 3
Minimum Mechanical Property Values ............................................................ 3
Minimum Magnetic Property Values ............................................................. 3
Minimum Controlled-Expansion Property Values ........................................ 3
Practical Methods of Demonstrating
Part Performance ................................................................................................. 3
Typical Values ......................................................................................................... 4
Chemical Composition...................................................................................... 4
Mechanical Properties ...................................................................................... 4
Heat Treatment ....................................................................................................... 4
Surface Finish ................................................................................................................ 4
Microstructure .......................................................................................................... 4
MIM Material Designation ................................................................................. 4
Material Selection .................................................................................................... 4
Grade Selection ...................................................................................................... 5
Density ........................................................................................................... 5
Ultimate Tensile Strength ................................................................................. 5
Yield Strength .......................................................................................................... 5
Elongation .......................................................................................................................... 5
Elastic Constants .................................................................................................... 5
Young’s Modulus (E) ........................................................................................ 5
Shear Modulus (G) ................................................................................................. 5
Poisson’s Ratio () ................................................................................... 5
Impact Energy ................................................................................................................ 5
Macroindentation Hardness (Apparent) ........................................................... 5
Microindentation Hardness ........................................................................... 6
Corrosion Resistance ....................................................................................... 6
Sulfuric Acid Testing ...................................................................................... 6
Copper Sulfate Testing .................................................................................. 6
Boiling Water Testing ..................................................................................... 6
Soft Magnetic Properties .................................................................................. 6
Magnetizing Field (H) ..................................................................................... 6
Induction (B) ......................................................................................................... 6
Maximum Induction (B
m
) ............................................................................... 6
Maximum Permeability (µ
max
) ....................................................................... 6
Coercive Field (H
c
) ......................................................................................... 6
Residual Induction (B
r
)................................................................................... 6
Thermal Properties ................................................................................... 7
Coefficient of Thermal Expansion (CTE) ........................................................ 7
Thermal Conductivity ................................................................................ 7
SI Units .......................................................................................................... 7
Referenced MPIF Standards .................................................................... 7
Comparable Standard ...................................................................................... 7
DATA TABLES – INCH-POUND UNITS
Low-Alloy Steels .................................................................................................. 8-9
Stainless Steels ........................................................................................ 10-11
Soft-Magnetic Alloys ............................................................................... 12-1 3
Controlled-Expansion Alloys .................................................................. 14-15
Copper .............................................................................................. 16-17
DATA TABLES – SI UNITS
Low-Alloy Steels ....................................................................................... 18-19
Stainless Steels ........................................................................................ 20-21
Soft-Magnetic Alloys ................................................................................. 22-23
Controlled-Expansion Alloys .................................................................. 24-25
Copper .............................................................................................. 26-27
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