MIM Materials Range
The powders used in metal injection molding (MIM) come in a variety of chemistries, particle sizes, and particle shapes. Powder availability determines which engineering materials can be produced by MIM; fortunately, most of the widely used engineering compositions are readily available.
Alloys can be formed by mixing elemental powders, or the combination of master alloy powders with elemental powders, to match the desired alloy. Another approach is to use pre-alloyed power where each particle contains all of the elements. Ferrous alloys are popular in MIM, and nearly half of the commercial activity is in stainless steels.
Most common engineering alloys are possible with MIM, but the most popular alloys are surgical steel MIM-17-4 PH (AISI 630) and austenitic stainless steels MIM-316L (AISI 316L).
The most common alloy families are:
- Low-alloy steels
- Stainless steels
Caption: Gas Atomization
- aluminum alloys
- bio-compatible alloys
- cobalt-based alloys
- controlled-expansion alloys,
- copper and copper alloys
- heavy-metal alloys
- magnetic alloys (soft and hard)
- nickel-based alloys
- precious metals
- reactive metals
- shape-memory alloys
- specialty alloys
- titanium and titanium alloys
- tool steels
The Metal Injection Molding Association (MIMA) keeps a detailed list of materials for MIM; however, please contact your supplier to see if the alloy or a substitute alloy is available.
For additional information on how to specify materials for components made using the MIM process, download a copy of MPIF Standard 35—Metal Injection Molded Parts. This standard will help guide you during your design process and throughout discussions with your fabricator.
The following list provides some materials that have been used in metal injection molding. Please check with your parts manufacturer to get an up-to-date listing of the available alloys.
|Austenitic Stainless Steels (and Master Alloys)||303, 303L
304, 304L, 304+Ti
310, 310 C2, 310S, 310N
316B, 316F, 316L, 316J1L, 316Ti, 314
|Duplex Stainless Steels||SAF2507
|Ferritic/Martensitic Stainless Steels (and Master Alloys)||410 Series, 410L
420 Series, 418
430 Series, 430L, 434
|Precipitation-Hardening Stainless Steels||15-5PH
|Low-Alloy Steels (and Master Alloys)||1010
4650 *replaced by 4605
|Nickel-Base Alloys||Hastelloy® C
|Inconel® 700 series
|Copper||HC Cu (99.9%)
|Cobalt-Base Alloys||Stellite® 6|
|Tool Steels & High-Speed Steels||A6