MIM Process Flow
Powder Production
In-house developed water-gas combined atomization technology for customized alloy powders, featuring high tap density and low oxygen content—laying a solid foundation for MIM molding.
Feedstock Mixing
Proprietary wax-based feedstock system (for solvent debinding) and comprehensive polymer-based feedstock systems—fully compatible with diverse metal material molding requirements.
Injection Molding
Equipped with high-end injection molding machines (e.g., Nissei), enabling seamless molding of complex geometries with high precision and excellent consistency.
Debinding & Sintering
Nitric acid catalyzed debinding + high-temperature sintering, achieving 98% relative density, 16–18% linear shrinkage, and dimensional accuracy of ±0.2%.
Post-Processing
Integrated precision machining, cleaning, and sterile packaging—meeting stringent cleanliness and precision requirements for medical and automotive applications.
Inspection & Delivery
Comprehensive inspection system covering composition, mechanical properties, surface appearance, and internal defects—ensuring full compliance with quality specifications.
Part Characteristics Suitable for MIM Processing
| Characteristic | English Term | Optimal Range | Minimum | Maximum |
|---|---|---|---|---|
| Mass (Weight) | Mass | 0.1 ~ 50 g | 0.01 g | 240 g |
| Wall Thickness | Wall Thickness | 0.5 ~ 5 mm | 0.1 mm | 10 mm |
| Aperture (Hole Diameter) | Aperture | > φ0.5 mm | φ0.3 mm | — |
| Size (Overall Dimension) | Size | 0.5 ~ 20 mm | 0.2 mm | 150 mm |
| Annual Usage Volume | Annual Usage | > 100 K | 5,000 | Million+ |
Natural Dimensional Tolerances & Surface Roughness of MIM
| Dimension (mm) | Standard Tolerance (mm) | Flatness (mm) | Draft Angle | Surface Roughness |
|---|---|---|---|---|
| 0 ~ 5 | ±0.05 | ±0.03 | 0 ~ 1° | Ra 0.8 ~ 1.4 |
| 5 ~ 10 | ±0.07 | ±0.05 | ||
| 10 ~ 20 | ±0.10 | ±0.10 | ||
| 20 ~ 50 | ±0.30 | ±0.20 | ||
| 50 ~ 100 | ±0.50 | ±0.20 |
Commonly Used MIM Materials
| Material | Grade | Tensile Strength | Yield Strength | Elongation | Hardness |
|---|---|---|---|---|---|
| Stainless Steel | 304L Austenitic | 620 >480 | 310 >170 | 30 ~30 | 65 HRB–92 HRB |
| 316L Austenitic | 515 >480 | 170 >170 | 50~35 | 65 HRB ~95 HRB | |
| 420 Martensitic | 1750 >1720 | 1560 1480 | 2 8 | 52 HRC | |
| 430 Ferritic | 415 >415 | 240 >205 | 25 >20 | 65 HRB~88 HRB | |
| 440C Martensitic | 1670 1970 | 1615 1900 | 2 2 | 55 HRC~57 HRC | |
| 17-4PH / 630 Precipitation-Hardening | 1185 >1170 | 1090 >1070 | 6 >10 | 33 HRB~45 HRC | |
| Titanium Alloys | Ti-6Al-4V ELI | 800 MPa | 700 MPa | 15 % | |
| Ti-6Al-7Nb | 760 MPa | 660 MPa | 12.5 % | ||
| Pure Titanium | 500 MPa | 420 MPa | 20 % |
Comparison of MIM with Other Conventional Manufacturing Processes
| Feature | Metal Injection Molding (MIM) | Powder Metallurgy (PM) | Casting | Machining |
|---|---|---|---|---|
| Relative Density | 98% | 90% | 95–99% | 100% |
| Strength | 98% | 70% | 98% | 100% |
| Surface Roughness (μm) | ≥1 | 2 | 3 | 0.4–2 |
| Geometric Complexity | High | Low | Medium | High |
| Design Flexibility | High | Medium | Medium | Low |
| Suitable Production Volume | High-volume | High-volume | Low-volume | Low-volume |
| Material Range | Broad | Medium | Medium | Medium |
Key Advantages of MIM Technology
Flexible Design for Complex Geometries
Integrated molding of cross-through holes, internal/external threads, etc.—eliminating additional machining costs.
Multi-Part Integration
Reduces assembly steps and eliminates cumulative tolerance and loosening issues.
Breaking Traditional Process Limitations
Enables production of micro-precision parts, thin-wall components, and other specialized geometries.
Significant Cost Advantage
High material utilization and process integration deliver substantial cost benefits for high-volume production.
Excellent Mechanical Properties
98% relative density yields mechanical performance comparable to machined parts, with superior surface finish and tight dimensional control.
Broad Material Portfolio
Covers 9 major categories including stainless steels, superalloys, soft magnetic materials—customizable upon request.
Production & Inspection Capabilities
Core Production Equipment
Nissei Injection Molding Machines: 21 units
Catalytic Debinding Furnaces: 5 units
German Continuous Sintering Furnace: 1 unit
CNC Machining Centers: 9 units
Ultrasonic Cleaning Systems
Sterile Packaging Production Line
Accredited Inspection Equipment
Zeiss Coordinate Measuring Machine (CMM): 1 unit
Keyence One-Touch Measuring Systems: 2 units
Mitutoyo Hardness Testers: 4 units
X-Ray Non-Destructive Testing (NDT) System
Universal Material Testing Machine
Salt Spray Tester / Metallographic Microscope
Product Applications
Automotive
Turbocharging Systems: turbine blades, nozzle rings, control valves
Fuel Systems: fuel injectors, fuel rail components
Transmission Systems: synchronizer hubs, shift forks
Electrical Systems: connectors, heat sinks, structural metal components
Medical
Surgical Instruments: precision instruments such as surgical clamps, scissors, and forceps
Medical Devices: endoscope components, robotic surgical joints
Implants: orthopedic implants, dental implants
Hearing Aids: housings, implantable precision structural components
Consumer Electronics
Mobile Phone Accessories: camera brackets, buttons, hinges
Wearables: smartwatch cases, earphone housings
Smart Speakers: precision structural components, decorative elements
Optical Communications: precision structural components, EMI shields, connectors
Tools & Hardware
Hand/Electric Tools: precision gears, shafts, nozzles
Architectural Hardware: precision lock components, hinges, fasteners
Precision Molds: mold cores, sliders, ejector pins
General Hardware: high-wear-resistant, high-precision miniature structural components
Aerospace
Engine Components: turbine blades, combustor nozzles, precision parts
Satellite Components: brackets, connectors, RF devices
UAV Components: motor housings, gimbal structural parts, landing gear components
Instrumentation: precision sensor housings, navigation device components
Machinery Components
Precision Gears: reduction gears, timing gears, micro transmission gears
Bearing Components: raceways, cages, precision miniature bearings
Hydraulic Systems: valve bodies, manifold plates, hydraulic fittings
Automation Equipment: cams, guide blocks, positioning fixtures
Quality Management System
End-to-End Digital Quality Control
The company has established a rigorous quality management system and implemented the QC Data platform to achieve paperless, intelligent quality management across IQC, IPQC, OQC, and the supply chain—ensuring full controllability and traceability at every stage.
Process capability (CPK) analysis for real-time monitoring of process stability
Statistical Process Control (SPC) for early warning of quality anomalies
Real-time quality data dashboards—full visibility of inspection status
Digital work orders, equipment & mold management—end-to-end traceability
Collaborating with China Iron & Steel Research Institute (CISRI-Nak) to provide authoritative third-party testing services
About Us
A Leading Enterprise in Advanced New Materials under China Iron & Steel Research Institute
Advanced Technology Co., Ltd. (AT&M) is a subsidiary of China Iron & Steel Research Institute Group and a national leader in advanced new materials. Listed on Shenzhen Stock Exchange (Stock Code: 000969), founded in 1952, AT&M has deep expertise in Metal Injection Molding (MIM), with its core MIM business operated by AnTaiMeiKe.
The company operates two production bases—in Kunshan and Shenzhen (each 5,600 m²)—and an international trade & R&D center in Shanghai (1,000 m²). It possesses a fully integrated MIM value chain—from powder production, feedstock mixing, injection molding, debinding & sintering, to inspection and delivery—and is among the few MIM manufacturers globally with proprietary atomization powder production technology.
Beyond MIM, the company also develops rare-earth permanent magnets (NdFeB, SmCo), precision alloys, nanocrystalline/amorphous products, and high-speed tool & die steels—providing premium material solutions across diverse industries.
State-Owned Enterprise
Subsidiary of China Iron & Steel Research Institute Group—the National R&D Base for Advanced Materials.
Independent R&D Capability
Water-gas combined atomization powder production technology—powder quality ranks among the world’s best.
Full-Chain Integration
One-stop MIM solution—from powder production to sintering.
Authoritative Certifications
Certified to IATF 16949, ISO 13485, and other international