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Technical Specifications
Product Overview
Metallurgical Characteristics
M390 exhibits a martensitic microstructure with fine, uniformly distributed vanadium and chromium carbides achieved through powder metallurgy processing. The high carbon content (1.9%) combined with 20% chromium provides exceptional hardness while maintaining corrosion resistance. The fine carbide distribution ensures superior wear resistance and edge retention compared to conventional stainless steels.
Heat Treatment Process
MetalZenith employs controlled atmosphere hardening at 1050-1080°C followed by cryogenic treatment at -80°C and tempering at 160-200°C. This precise heat treatment cycle optimizes carbide precipitation and achieves maximum hardness while maintaining dimensional stability and corrosion resistance.
Advanced Manufacturing Process
Our powder metallurgy process begins with gas atomized powder production under inert atmosphere, followed by hot isostatic pressing (HIP) to achieve full density. Subsequent thermomechanical processing and precision machining ensure exceptional surface quality and dimensional accuracy required for medical and food industry applications.
Specialized Quality Testing
MetalZenith conducts comprehensive testing including pitting potential measurement in 3.5% NaCl solution, ASTM A262 Practice A intergranular corrosion testing, stress corrosion cracking evaluation per ASTM G36, and passivation layer thickness verification using XPS analysis. Additional testing includes biocompatibility assessment for medical applications and FDA compliance verification for food contact surfaces.
Application-Specific Technical Considerations
For chemical equipment applications, M390 provides excellent resistance to organic acids and chloride environments. In food industry applications, the steel meets FDA requirements with superior cleanability and sterilization resistance. Medical device applications benefit from the combination of hardness, corrosion resistance, and biocompatibility. Marine applications leverage the high pitting resistance and crevice corrosion resistance, while architectural applications utilize the excellent surface finish retention and weathering resistance.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | 1.90 |
| Chromium (Cr) | 20.00 |
| Molybdenum (Mo) | 1.00 |
| Vanadium (V) | 4.00 |
| Tungsten (W) | 0.60 |
| Silicon (Si) | 0.90 |
| Manganese (Mn) | 0.30 |
| Iron (Fe) | Balance |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (MPa) | ≥ 1900 |
| Tensile Strength (MPa) | 2200 - 2400 |
| Elongation (%) | 2 - 4 |
| Hardness (HRC) | 60 - 64 |
| Pitting Resistance (PREN) | ≥ 25 |
| Corrosion Rate (mm/year) | < 0.1 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density (g/cm3) | 7.80 |
| Melting Point (°C) | 1420 - 1460 |
| Thermal Conductivity (W/m·K) | 24.2 |
| Thermal Expansion (×10??/K) | 10.4 |
| Electrical Resistivity (μΩ·cm) | 60 |
| Elastic Modulus (GPa) | 200 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Bars, Rods, Sheets, Custom Forgings |
| Diameter Range | 3 - 200mm |
| Thickness Range | 0.5 - 50mm |
| Length Range | 100 - 6000mm |
| Surface Finish | Ground, Polished, Passivated |
| Heat Treatment Condition | Hardened and Tempered |
| Standards Compliance | ASTM A276, FDA 21CFR177.2600 |
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Our Advantages in Processing M390 Steel (Bohler PM Stainless)
Advanced Powder Metallurgy Processing
MetalZenith employs sophisticated powder metallurgy techniques with controlled atmosphere sintering and precision heat treatment cycles. Our advanced processing ensures uniform carbide distribution and optimal microstructure, delivering exceptional hardness retention and corrosion resistance throughout the material cross-section.
Comprehensive Corrosion Testing Protocol
MetalZenith conducts extensive corrosion testing including pitting potential measurement (>350mV SCE), ASTM A262 intergranular corrosion testing, stress corrosion cracking evaluation in chloride environments, and passivation layer thickness verification. Our rigorous testing ensures superior performance in aggressive chemical and marine environments.
Precision Custom Processing Services
MetalZenith offers comprehensive custom processing including precision machining, specialized heat treatment cycles, surface finishing, and passivation services. Our technical team provides expert consultation for application-specific requirements, ensuring optimal performance in medical, food processing, and chemical industry applications.
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