MIM Stainless Steel Materials for Custom Metal Parts
Metal Injection Molding (MIM) stainless steel is the most commonly used material. At XY-GLOBAL, we specialize in high-quality MIM stainless steel materials, including 304, 316L, 17-4PH, 430, and 440C. With multiple grades available, we help you achieve reliable performance, consistent quality, and cost-effective mass production.
- Multiple MIM Stainless Steel Grades Available
- Inspection and Traceability
- Cost-Effective Mass Production
MIM Stainless Steel Overview
MIM stainless steel combines the advantages of powder metallurgy and injection molding processes, making it suitable for complex geometric parts with density reaching 95-99% of castings and mechanical properties close to forged parts. Its corrosion resistance stems from chromium content (>10.5%), making it ideal for medical, aerospace, automotive, and consumer electronics applications.
With over 15 years of MIM expertise, XY-GLOBAL helps customers turn these material advantages into reliable, high-performance parts for demanding applications.
MIM Stainless Steel Alloys and Applications
17-4PH
17-4PH is a precipitation-hardening stainless steel known for its high strength and good corrosion resistance. It is widely used for structural parts that require heat treatment and strong mechanical performance.
304
304 is a general-purpose austenitic stainless steel with good corrosion resistance and excellent formability. It is suitable for cost-sensitive parts and applications that do not require extreme corrosion resistance.
316L
316L offers better corrosion resistance than 304, especially in chloride-rich environments. It is commonly used in medical, chemical, and marine-related applications.
420
420 is a martensitic stainless steel with good hardness and wear resistance. It is a strong option for parts that need durability and moderate corrosion resistance.
440C
440C is a high-hardness martensitic stainless steel that performs well in wear-resistant applications. It is often used for cutting, locking, and precision mechanical components.
430L
430L is a ferritic stainless steel with magnetic properties and a cost advantage. It is suitable for magnetic or lower-cost functional parts where high corrosion resistance is not the main priority.
MIM Stainless Steel Grades and Properties
MIM stainless steels are commonly grouped by microstructure into austenitic, martensitic, ferritic, and precipitation-hardening grades. Each alloy offers a different balance of corrosion resistance, strength, hardness, ductility, and cost, so comparing composition and performance together is the most effective way to choose the right material for your application.
| Alloy | Microstructure | Main Composition | Density (g/cm³) | Tensile Strength (MPa) | Yield Strength (MPa) | Hardness | Elongation (%) | Best For |
|---|---|---|---|---|---|---|---|---|
| 17-4PH | Precipitation-hardening | Cr 15.5-17.5, Ni 3.0-5.0, Cu 3.0-5.0, Nb+Ta 0.15-0.45 | ≥7.65 | ≥950 / up to 1206 after H900 | 730 / up to 1089 after H900 | 25-30 HRC / up to 40 HRC | ≥3 / up to 9 | High-strength structural parts |
| 304 | Austenitic | Cr 18.0-20.0, Ni 8.0-11.0 | ≥7.75 | ≥480 | ≥160 | 100-150 HV10 | ≥40 | General-purpose parts |
| 316L | Austenitic | Cr 16.0-18.0, Ni 10.0-14.0, Mo 2.0-3.0 | 7.90-8.00 | 480-620 | 190-310 | 15-25 HRC | 30-50 | Corrosion-resistant parts |
| 420 | Martensitic | Cr 12.0-14.0, Ni <0.75 | ≥7.55 | ≥750 | ≥600 | 30-39 HRC | ≥1 | Wear-resistant parts |
| 440C | Martensitic | Cr 16.0-18.0, Ni <0.75, Mo 0.75 | ≥7.50 | ≥700 | ≥600 | 30-39 HRC | ≥1 | High-hardness parts |
| 430L | Ferritic | Cr 16.0-18.0, Ni <0.75 | 7.60-7.70 | 450-550 | 240-350 | 80-90 HRB | 20-30 | Magnetic or cost-sensitive parts |
Why Choose Stainless Steel for MIM Parts
Stainless steel is well suited for MIM parts that require complex geometry, tight tolerances, and consistent performance in demanding environments.
- Higher density: Helps achieve stable, functional parts with reliable performance.
- Improved strength and toughness: Suitable for structural and load-bearing components.
- Good ductility: Supports complex forming and reduces the risk of cracking.
- Excellent corrosion resistance: Ideal for medical, automotive, and industrial applications.
- Good machinability and weldability: Supports secondary processing when needed.
- Hygienic properties: Well suited for medical and food-related applications.
- Aesthetic appeal: Provides a clean, polished appearance for visible parts.