Metal Injection Molding (MIM)

MIM is a high-precision metal forming process that combines the flexibility of plastic injection molding with the strength of powdered metal sintering. It is ideal for producing small, intricate metal parts with tight tolerances and near-net shape, reducing the need for machining. Compared to CNC machining or casting,

Stainless steel (316L, 17-4PH), low alloy steels, titanium, copper, and even some magnetic alloys are widely used. Material selection depends on strength, corrosion resistance, and finish requirements.

MIM generally supports a wide range of metal powders, including:
✔ Stainless Steels – 17-4PH, 316L, 420
✔ Low Alloy Steels – FN02, 4140, 8620
✔ Soft Magnetic Alloys – FeSi3, FN50
✔ Titanium & Superalloys – Ti6Al4V, Inconel 718
✔ Copper & Bronze Alloys – CuSn10, CuNiSiCr

MIM is most effective for small components under 100 grams, especially those with intricate features. Larger parts may require hybrid approaches or alternative processes.

MIM is most cost-effective for mid-to-high volume production (typically 10,000+ parts per year). Lead times depend on part complexity but generally range from 6 to 12 weeks, including tooling, prototyping, and mass production.

MIM is up to 50% more cost-effective than CNC machining for complex, small parts, especially in high volumes. It also produces stronger, more precise parts than casting, with better material utilization and less secondary machining required.

MIM eliminates much of the time and waste associated with CNC, particularly for complex geometries. It’s common to see 30–50% savings in part cost at scale.