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Technical Specifications
Product Overview
Metallurgical Characteristics
EN 1.4401 is an austenitic stainless steel with a face-centered cubic crystal structure that provides excellent ductility and toughness. The addition of molybdenum (2-3%) significantly enhances corrosion resistance, particularly in chloride-containing environments. The balanced chromium-nickel composition ensures stable austenitic structure at room temperature while maintaining non-magnetic properties.
Heat Treatment and Processing
Solution annealing is performed at 1050-1100°C followed by rapid cooling to achieve optimal corrosion resistance and mechanical properties. MetalZenith employs controlled atmosphere furnaces to prevent surface oxidation during heat treatment. Cold working can increase strength but may reduce corrosion resistance, requiring subsequent annealing for critical applications.
Manufacturing Process Excellence
MetalZenith's production process begins with carefully selected raw materials melted in electric arc furnaces with AOD refining for precise composition control. Hot rolling is performed within optimal temperature ranges (1150-950°C) to achieve desired mechanical properties. Cold finishing operations include precision rolling, drawing, and machining to meet exact dimensional requirements.
Quality Standards and Testing
All EN 1.4401 products undergo comprehensive testing including chemical analysis by optical emission spectroscopy, mechanical testing per ASTM A370, intergranular corrosion testing per ASTM A262, and ultrasonic examination for internal soundness. Mill test certificates are provided with full traceability documentation.
Corrosion Resistance Performance
EN 1.4401 exhibits superior resistance to pitting and crevice corrosion with a PREN (Pitting Resistance Equivalent Number) of approximately 25. The material demonstrates excellent performance in seawater, organic acids, and many chemical processing environments. Stress corrosion cracking resistance is enhanced compared to standard 304 grades due to molybdenum content.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.030 |
| Silicon (Si) | ≤ 1.00 |
| Manganese (Mn) | ≤ 2.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 17.0 - 20.0 |
| Nickel (Ni) | 10.0 - 14.0 |
| Molybdenum (Mo) | 2.0 - 3.0 |
| Nitrogen (N) | ≤ 0.11 |
| Iron (Fe) | Balance |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (Rm) | 520 - 670 MPa |
| Yield Strength (Rp0.2) | ≥ 205 MPa |
| Elongation (A5) | ≥ 40% |
| Hardness (HB) | ≤ 215 |
| Hardness (HV) | ≤ 230 |
| Impact Energy (KV) at 20°C | ≥ 60 J |
| Young's Modulus | 200 GPa |
| Shear Modulus | 81 GPa |
| Poisson's Ratio | 0.27 - 0.30 |
| Fatigue Limit (10⁷ cycles) | 240 MPa |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 8.0 g/cm³ |
| Melting Point | 1400 - 1450°C |
| Thermal Expansion Coefficient (20-100°C) | 16×10-6/K |
| Thermal Expansion Coefficient (20-200°C) | 16.5×10-6/K |
| Thermal Conductivity at 20°C | 15 W/m·K |
| Thermal Conductivity at 100°C | 16.3 W/m·K |
| Specific Heat Capacity | 500 J/kg·K |
| Electrical Resistivity at 20°C | 0.74 µΩ·m |
| Magnetic Permeability | ≤ 1.02 µr |
| Curie Temperature | Non-magnetic |
📏 Product Specifications
| Specification | Details |
|---|---|
| Available Forms | Round bars, square bars, flat bars, sheets, plates, tubes, pipes, wire, forgings |
| Round Bar Diameter | 6mm - 300mm |
| Square Bar Size | 10mm - 150mm |
| Flat Bar Dimensions | Thickness: 3-50mm, Width: 20-300mm |
| Sheet Thickness | 0.4mm - 6mm |
| Plate Thickness | 6mm - 100mm |
| Tube Outer Diameter | 6mm - 219mm |
| Standards | EN 10088, ASTM A240, A276, A312, A479, JIS G4303, G4304, G4305 |
| Surface Finishes | Hot rolled, cold rolled, bright annealed, pickled, 2B, BA, No.4, hairline, mirror |
| Dimensional Tolerance | According to EN, ASTM, JIS standards or customer requirements |
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Our Advantages in Processing EN 1.4401
Advanced Melting and Refining Technology
MetalZenith utilizes cutting-edge electric arc furnace technology combined with argon oxygen decarburization (AOD) refining to achieve precise chemical composition control and ultra-low inclusion content in EN 1.4401 production, ensuring superior material purity and consistency.
Comprehensive Quality Control System
Our integrated quality management system features real-time spectroscopic analysis, automated mechanical testing, and advanced non-destructive examination techniques, guaranteeing that every batch of EN 1.4401 meets or exceeds international standards and customer specifications.
Flexible Customization and Global Supply
MetalZenith offers extensive customization capabilities including special dimensions, surface finishes, and heat treatment conditions for EN 1.4401, supported by our global distribution network ensuring reliable delivery to customers worldwide with comprehensive technical support.
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