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Technical Specifications
Product Overview
Metallurgical Characteristics
Nitronic 40 features a fully austenitic microstructure strengthened by interstitial nitrogen atoms. The nitrogen content of 0.15-0.40% provides solid solution strengthening while maintaining excellent ductility and toughness. The balanced chromium-nickel-manganese composition ensures stable austenite formation and superior corrosion resistance in chloride environments.
Heat Treatment Process
MetalZenith employs solution annealing at 1900-2100°F (1040-1150°C) followed by rapid water quenching to retain maximum nitrogen in solution and prevent carbide precipitation. This process ensures optimal mechanical properties and corrosion resistance while maintaining the fine-grained austenitic structure essential for superior performance.
Advanced Manufacturing Process
Our controlled atmosphere electric arc furnace melting with nitrogen injection ensures precise nitrogen control and minimal inclusion content. Advanced hot rolling with controlled cooling rates optimizes grain structure, while our proprietary surface conditioning processes enhance passivation film formation for maximum corrosion protection.
Specialized Quality Testing
MetalZenith conducts comprehensive testing including pitting potential measurement at +350mV vs SCE minimum, intergranular corrosion testing per ASTM A262 Practice E, stress corrosion cracking evaluation in boiling MgCl2, and passivation film thickness analysis ensuring 2-5nm optimal thickness for maximum protection in aggressive environments.
Application-Specific Considerations
For chemical processing equipment, our material meets NACE MR0175 requirements for sour service. Food industry applications benefit from FDA compliance and enhanced cleanability. Medical device applications utilize our ultra-low inclusion grades with validated biocompatibility. Marine applications leverage superior pitting resistance in seawater, while architectural applications benefit from excellent atmospheric corrosion resistance and aesthetic durability.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.04 |
| Chromium (Cr) | 19.0 - 21.5 |
| Nickel (Ni) | 11.5 - 13.5 |
| Manganese (Mn) | 8.0 - 10.0 |
| Silicon (Si) | ≤ 1.0 |
| Nitrogen (N) | 0.15 - 0.40 |
| Phosphorus (P) | ≤ 0.04 |
| Sulfur (S) | ≤ 0.03 |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (MPa) | ≥ 380 |
| Tensile Strength (MPa) | 690 - 930 |
| Elongation (%) | ≥ 35 |
| Hardness (HRB) | 95 - 105 |
| Pitting Resistance (PREN) | ≥ 25 |
| Galling Resistance | Excellent |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density (g/cm3) | 7.90 |
| Melting Point (°C) | 1400 - 1450 |
| Thermal Conductivity (W/m·K) | 14.2 |
| Thermal Expansion (×10??/K) | 16.0 |
| Electrical Resistivity (μΩ·cm) | 85 |
| Elastic Modulus (GPa) | 200 |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Plates, Sheets, Bars, Rods, Tubes, Forgings |
| Thickness Range | 0.5 - 150mm |
| Width Range | 1000 - 3000mm |
| Length Range | 2000 - 12000mm |
| Standards Compliance | ASTM A240, ASME SA-240, UNS S21900 |
| Surface Finish | 2B, BA, No.4, No.8, Custom |
| Heat Treatment Condition | Solution Annealed |
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Our Advantages in Processing Nitronic 40 Stainless Steel
Advanced Nitrogen-Enhanced Processing
MetalZenith utilizes precision controlled atmosphere melting with optimized nitrogen injection to achieve uniform nitrogen distribution throughout the austenitic matrix. Our advanced solution annealing process at 1900-2100°F ensures complete carbide dissolution and optimal nitrogen retention for maximum strength and corrosion resistance.
Comprehensive Corrosion Testing Protocol
Our specialized testing laboratory conducts extensive pitting potential measurements (ASTM G150), intergranular corrosion testing (ASTM A262), stress corrosion cracking evaluation (ASTM G123), and passivation film thickness analysis using XPS technology. This ensures superior performance in chloride environments and aggressive chemical media.
Custom Fabrication & Technical Support
MetalZenith provides comprehensive custom processing including precision machining, forming, and welding services specifically optimized for Nitronic 40's unique properties. Our metallurgical engineers offer technical consultation for application-specific heat treatment and surface finishing to maximize performance in demanding environments.
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