Metal Injection Molding Materials

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Metal Injection Molding Materials

What Makes Metal Injection Molding Different?

Metal injection molding (MIM) is a proven manufacturing process that combines the design flexibility of plastic injection molding with the strength and performance of metal.

Unlike plastic, MIM parts are engineered with true metal properties, making them ideal for structural and high-performance applications in medical, military, aerospace, industrial, and automotive industries.

The key ingredient in the metal injection molding process is the feedstock—a specialized blend of fine metal powders and thermoplastic binders. This material is formed into precise, complex components through injection into a molding machine, followed by debinding and high-temperature sintering. The result? High-density, net-shape metal parts with excellent mechanical properties, surface finish, tight tolerances, and dimensional accuracy. MIM excels at creating parts with complex geometry and consistent quality.

MIM also provides broad flexibility in alloy selection. As long as the alloy has a sufficiently high melting point to survive the sintering process and the metal powder can be manufactured to a fine enough particle size, it can likely be used in MIM. This includes a wide range of steels, refractory metals, magnetic alloys, and hard metals. However, lower-melting-point materials such as aluminum and zinc are typically excluded from the MIM process due to thermal limitations.

APP Material Expertise

At Advanced Powder Products (APP), we know that choosing the right material is critical to the success of your part. Our metallurgical expertise and proprietary MIM feedstock solutions ensure your components meet demanding performance requirements while maintaining cost-efficiency.

APP offers:

  • On-site P.E. metallurgist and material science experts
  • In-house manufacturing of custom MIM feedstock
  • Technical support for selecting metal powders based on application
  • Alloy and shrinkage modification with quick response times
  • IP development support for proprietary applications
  • MIM part produced that exceed MPIF Standard 35 properties
  • Compatibility with BASF/Catamold® feedstock
  • Multi-alloy capability from the same mold tool
  • In-house carbon content analysis and metallurgy testing
  • Built-in quality control throughout the MIM process
Metal Injection Molding Materials
Metal Powder Feedstock

Metal Powder Feedstock

Our metal powder feedstock is engineered for performance. APP formulates feedstocks by mixing ultra-fine metal particles with wax and polymer binders. The blend is pelletized and injection molded into “green parts,” then debound and sintered to achieve final density and shape.

Whether you're launching a new part or transferring an existing mold, APP can support both proprietary and industry-standard feedstock systems, including BASF/Catamold®. All of our MIM feedstock solutions are based on metallurgical science and optimized for consistency, strength, and performance.

MIM Alloys for Every Need

MIM offers unmatched versatility in materials selection. With the ability to achieve high-density, precision-shaped metal parts, MIM is the preferred method for producing components that demand both performance and complexity.

Our customers choose MIM alloys based on desired mechanical properties, corrosion resistance, magnetic behavior, bio-compatibility, or load capacity. APP manufactures and stocks a comprehensive range of MIM materials, including stainless steels, low alloy steels, tool steels, soft-magnetic alloys, and specialty metals. These are ideal for:

  • Surgical instruments
  • Automotive components
  • Aerospace fittings
  • Industrial tooling
  • Medical device housings
  • Electronics requiring precise thermal and electrical control
MIM Materials

MIM Materials We Offer

APP supports a broad portfolio of metal injection molding materials to meet the diverse requirements of your parts. Our MIM alloy options include:

Material Family Application Specific Alloys Specific Feature
Stainless Steel Medical, electronic, hardware, sporting goods, aerospace, consumer products
17-4PH
316L
420, 440C
310
Strength, heat treatable
Corrosion resistance, ductility, nonmagnetic
Hardness, wear resistance, heat treatable
Corrosion and heat resistance
Low-alloy Steel Hardware, bearings, races, consumer goods, machine parts
1000 Series
4000 Series
52100
Case hardenable
General purpose
High wear resistance
Tool Steel Wood and metal cutting tools
M2/M4
T15
M42
S7
61-66 HRC
63-68 HRC
65-70 HRC
55-60 HRC
Bioimplantable Implantable, Prosthetic replacements (hips, knees, etc.) bone plates, screws, rods, heart valves
F-75 (ASTM F2886)
MP35N (ASTM F562)
High strength, superior corrosion resistance, non-magnetic, biocompatibility
Titanium Medical, aerospace, consumer products
Ti
Ti-6AI-4V
Light Weight
Light weight, high strength
Copper Electronic, thermal management
Cu
W-Cu, Mo-Cu
High thermal and electrical conductivity
High thermal conductivity, low thermal expansion
Magnetic Electronic solenoids, armatures, relay
Fe-3%Si
Fe-50%Ni
Fe-50%Co
Low core losses and high electrical resistivity
High permeability and low coercive field
Highest magnetic saturation
Tungsten Military, electronic, sporting goods
W
W heavy alloy
Density
Density and toughness
Hardmetals Cutting and wear applications
WC-5Co
WC-10Co
Higher hardness
Higher toughness
Stainless Steel
Applications
Medical, electronics, hardware, sporting goods, aerospace, consumer products
Specific Alloys & Features
17-4PH Strength, heat treatable
316L Corrosion resistance, ductility, nonmagnetic
420, 440C Hardness, wear resistance, heat treatable
310 Corrosion and heat resistance
Low-Alloy Steel
Applications
Hardware, bearings, braces, consumer goods, machine parts
Specific Alloys & Features
1000 Series Case pardonable
4000 Series General purpose
52100 High wear resistance
Tool Steel
Applications
Wood and metal cutting tools
Specific Alloys & Features
1000 Series Case pardonable
4000 Series General purpose
52100 High wear resistance
Bioimplantable
Applications
Implantable, Prosthetic replacements (hips, knees, etc.), bone plates, screws, rods, heart valves
Specific Alloys & Features
F-75 (ASTM F2886) High strength, superior corrosion resistance, non-magnetic, biocompatibility
MP35N (ASTM F562)
52100 High wear resistance
Titanium
Applications
Medical, aerospace, consumer products
Specific Alloys & Features
Ti Light Weight
Ti-6AI-4V Light weight, high strength
Copper
Applications
Electronic, thermal management
Specific Alloys & Features
Cu High thermal and electrical conductivity
W-Cu, Mo-Cu High thermal conductivity, low thermal expansion
Magnetic
Applications
Electronic solenoids, armatures, relay
Specific Alloys & Features
Fe-3%Si Low core losses and high electrical resistivity
Fe-50%Ni High permeability and low coercive field
Fe-50%Co Highest magnetic saturation
Tungsten
Applications
Military, electronic, sporting goods
Specific Alloys & Features
W Density
W heavy alloy Density and toughness
Hardmetals
Applications
Cutting and wear applications
Specific Alloys & Features
WC-5Co Higher hardness
WC-10Co Higher toughness