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Technical Specifications
Product Overview
Metallurgical Characteristics
UNS S32750 exhibits a balanced duplex microstructure consisting of approximately 50% austenite and 50% ferrite phases. This unique structure provides exceptional strength-to-weight ratio and superior resistance to stress corrosion cracking, pitting, and crevice corrosion. The high nitrogen content enhances both mechanical properties and corrosion resistance, while molybdenum additions significantly improve pitting resistance equivalent number (PREN ≥ 40).
Heat Treatment Process
MetalZenith employs precise solution annealing at 1020-1100°C followed by rapid water quenching to achieve optimal microstructure balance. Our controlled cooling process prevents harmful intermetallic phase precipitation while maintaining the desired austenite-ferrite ratio. Post-heat treatment stress relieving at 300-400°C may be applied for specific applications requiring dimensional stability.
Manufacturing Excellence
Our advanced manufacturing process begins with vacuum induction melting using premium raw materials, followed by electroslag remelting for enhanced cleanliness. Hot working operations are carefully controlled within the temperature range of 950-1200°C to maintain optimal microstructure. Cold working capabilities include precision machining, forming, and welding using specialized techniques for duplex stainless steels.
Quality Standards Compliance
MetalZenith maintains strict adherence to international standards including ASTM A182/A240/A479, EN 10088-2/10088-3, and JIS G4303. Our quality management system encompasses chemical analysis using optical emission spectroscopy, mechanical testing per ASTM E8/E23, corrosion testing including ASTM G48, and comprehensive microstructure examination. All products undergo 100% dimensional inspection and non-destructive testing when specified, ensuring consistent quality and performance in critical applications.
🧪 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 |
| Yield Strength 0.2% (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 |
| Young's Modulus | 200 GPa |
| Shear Modulus | 77 GPa |
| Poisson's Ratio | 0.30 |
| Fatigue Limit (10&sup7; cycles) | 350 MPa |
🔬 Physical Properties
| Property | Value |
|---|---|
| Density | 7.8 g/cm³ |
| Melting Point | 1300-1370°C |
| Thermal Conductivity at 20°C | 17 W/m·K |
| Thermal Conductivity at 100°C | 19 W/m·K |
| Thermal Expansion (20-100°C) | 13.0×10-6/K |
| Thermal Expansion (20-200°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 µH/m |
| Curie Temperature | -50°C |
📏 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 |
| Surface Finish | Hot rolled, cold rolled, bright annealed, pickled, polished |
| Tolerance | ±0.1mm for precision products, standard tolerances per ASTM/EN |
| Length | Up to 12 meters (custom lengths available) |
| Certifications | Mill Test Certificate, EN 10204 3.1/3.2, NACE MR0175 |
Let Us Create Success for Your Project
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Our Advantages in Processing UNS S32750
Advanced Vacuum Melting Technology
MetalZenith utilizes state-of-the-art vacuum induction melting (VIM) and electroslag remelting (ESR) processes to achieve exceptional chemical homogeneity and minimize inclusions in UNS S32750. Our controlled atmosphere processing ensures optimal nitrogen content and precise phase balance for superior corrosion resistance and mechanical properties.
Comprehensive Quality Control Systems
Our ISO 9001:2015 certified facilities feature advanced testing laboratories with PMI analyzers, universal testing machines, and corrosion testing equipment. Every batch undergoes rigorous chemical analysis, mechanical testing, and microstructure examination to guarantee compliance with international standards and customer specifications.
Custom Processing and Global Supply
MetalZenith offers extensive customization capabilities including precision machining, heat treatment optimization, and specialized surface finishes. Our global supply chain network ensures reliable delivery worldwide, supported by comprehensive technical documentation and engineering support for critical applications.
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