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Technical Specifications
Product Overview
Metallurgical Characteristics
AISI 2507 super duplex stainless steel exhibits a balanced microstructure consisting of approximately 50% austenite and 50% ferrite phases. This dual-phase structure provides exceptional strength-to-weight ratio and superior corrosion resistance compared to conventional austenitic stainless steels. The high chromium, molybdenum, and nitrogen content contributes to outstanding pitting and crevice corrosion resistance, with a PREN (Pitting Resistance Equivalent Number) exceeding 40.
Heat Treatment Process
MetalZenith's optimized heat treatment involves solution annealing at 1050-1100°C followed by rapid cooling in water or air. This process ensures complete dissolution of carbides and nitrides while maintaining the optimal austenite-ferrite balance. Our controlled cooling rates prevent the formation of detrimental intermetallic phases such as sigma phase, ensuring maximum toughness and corrosion resistance.
Manufacturing Process
Our manufacturing process begins with vacuum induction melting (VIM) using high-purity raw materials, followed by electroslag remelting (ESR) for enhanced cleanliness. Hot working is performed between 1200-950°C with careful temperature control to maintain microstructural integrity. Cold working operations utilize specialized equipment to handle the high strength characteristics of this super duplex grade.
Quality Standards & Testing
All AISI 2507 products manufactured by MetalZenith comply with international standards including ASTM A182/A240, EN 10088, and NACE MR0175/ISO 15156. Comprehensive testing includes chemical analysis by optical emission spectroscopy, mechanical testing per ASTM A370, ferrite content measurement, and specialized corrosion testing including critical pitting temperature (CPT) and critical crevice temperature (CCT) evaluation. Non-destructive testing includes ultrasonic examination and magnetic particle inspection as required.
🧪 Chemical Composition
| Element | Composition (%) |
|---|---|
| Carbon (C) | ≤ 0.030 |
| Manganese (Mn) | ≤ 1.20 |
| Silicon (Si) | ≤ 0.80 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.020 |
| Chromium (Cr) | 24.0 - 26.0 |
| Nickel (Ni) | 6.0 - 8.0 |
| Molybdenum (Mo) | 3.0 - 5.0 |
| Nitrogen (N) | 0.24 - 0.32 |
| Copper (Cu) | ≤ 0.50 |
| Tungsten (W) | ≤ 0.50 |
| Iron (Fe) | Balance |
⚙️ Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength (Rm) | ≥ 800 MPa |
| 0.2% Proof Strength (Rp0.2) | ≥ 550 MPa |
| Elongation (A5) | ≥ 15% |
| Hardness (HRC) | ≤ 32 |
| Impact Energy (KV) at 20°C | ≥ 60 J |
| Impact Energy (KV) at -40°C | ≥ 40 J |
| Fatigue Limit (10^7 cycles) | 350 MPa |
| Young's Modulus | 200 GPa |
| Shear Modulus | 80 GPa |
| Poisson's Ratio | 0.27 |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 7.80 g/cm³ |
| Melting Point | 1350-1400°C |
| Thermal Conductivity at 20°C | 14 W/m·K |
| Thermal Conductivity at 100°C | 16 W/m·K |
| Thermal Expansion (20-100°C) | 13.0×10-6/K |
| Thermal Expansion (20-300°C) | 13.5×10-6/K |
| Specific Heat Capacity | 480 J/kg·K |
| Electrical Resistivity at 20°C | 0.85 µΩ·m |
| Magnetic Permeability | 1.02 µr |
| Curie Temperature | Non-magnetic |
📏 Product Specifications
| Specification | Available Options |
|---|---|
| Product Forms | Round bars, square bars, flat bars, plates, sheets, tubes, pipes, forgings |
| Round Bar Diameter | 6mm - 300mm |
| Plate Thickness | 3mm - 100mm |
| Sheet Thickness | 0.5mm - 6mm |
| Tube Outer Diameter | 6mm - 219mm |
| Standards | ASTM A182, A240, A479, A789, A790, EN 10088, JIS G4303, G4304 |
| Surface Finish | Hot rolled, cold drawn, pickled, polished, machined |
| Tolerance | h9, h11 for bars; ±0.1mm for plates |
| Length | Up to 12 meters (custom lengths available) |
| Condition | Solution annealed, pickled and passivated |
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Our Advantages in Processing AISI 2507
Advanced Vacuum Melting Technology
MetalZenith employs cutting-edge vacuum induction melting (VIM) and electroslag remelting (ESR) processes to produce AISI 2507 with superior cleanliness and homogeneity. Our controlled atmosphere processing eliminates inclusions and ensures optimal microstructural balance between austenite and ferrite phases.
Comprehensive Quality Control System
Our state-of-the-art testing laboratory features advanced optical emission spectrometers, universal testing machines, and specialized corrosion testing equipment. Every batch undergoes rigorous chemical analysis, mechanical testing, and microstructural examination to guarantee consistent quality and performance.
Custom Processing & Global Supply
MetalZenith offers extensive customization capabilities including precision machining, heat treatment optimization, and surface finishing. Our global distribution network ensures reliable delivery worldwide, while our technical support team provides comprehensive engineering assistance for specific application requirements.
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