MIM process is able to work on below materials:
Iron-Nickel-Carbon alloy :
|
Fe-2%Ni
Fe-8%Ni |
Stainless steel alloy : |
316L, 304L, 630(17-4PH), 440C, 420J2 |
Carbon steel : |
4140, 4340 |
Specialize alloy : |
M2, SKD11, Kovar (F150), Cu, SKH57 |
Soft magnetic alloy : |
Permalloy PB, Permallot PC, 18Si-Fe |
MIM Mechanical properties of frequently used materials
Item |
Density
(g/cm3) |
Tensile strength
(Mpa) |
Elongation
(%) |
Apparent hardness |
Hardness after heat treatment |
Properties |
Fe-2%Ni |
>7.4 |
280 |
25 |
HRb55 |
HRc50↑ |
|
Fe-8%Ni |
>7.4 |
450 |
12 |
HRb84 |
HRc48↑ |
|
316L |
>7.5 |
495 |
53 |
HRb66 |
|
Good corrosion stability |
304 |
>7.4 |
480 |
40 |
HRb187 |
|
|
17-4PH |
>7.6 |
850 |
6 |
HRb100 |
HRc38 |
|
420J2 |
>7.4 |
540 |
18 |
|
HRc40 |
|
4140 |
>7.5 |
1100 |
3 |
|
HRc50 |
|
4340 |
>7.4 |
950 |
10 |
|
HRc50-60 |
|
M2 |
>7.9 |
1600 |
|
|
HRc60 |
|
Above data for reference only
|
MIM Tolerance Chart
| M.I.M. Tolerance Chart |
| Dimension |
Tolerance |
25.0 mm~ |
±0.15 |
12.0~25.0 mm |
±0.10 |
6.0~12.0 mm |
±0.05 |
3.0~6.0 mm |
±0.03 |
1.0~3.0 mm |
±0.02 |
~1.0mm |
±0.02 |
MIM compared with other other processes
| |
MIM |
Traditional powder metallurgy |
Precision forging |
Machining |
Production cost |
Medium |
Low |
Medium |
High |
Density |
95%-99% |
<95% |
100% |
100% |
Probability for mass production |
High |
High |
Medium |
Low |
Mechanical properties |
High |
Medium |
Medium |
High |
Surface roughness |
Fine |
Medium |
Medium |
Fine |
Geometrical complexity |
High |
Low |
Medium |
High |
Material choice |
Many |
Medium |
Medium |
Many |
Coating |
Excellent |
Low |
Excellent |
Excellent |
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