描述
双相不锈钢产品规格书 / Duplex Stainless Steel Product Specification
材料标准:UNS S31803/S32205 | EN 1.4462 | ASTM A790/A928
1. 化学成分 Chemical Composition (%)
元素 Element |
UNS S31803 |
UNS S32205 |
EN 1.4462 |
碳 Carbon (C) |
≤0.030 |
≤0.030 |
≤0.030 |
铬 Chromium (Cr) |
21.0–23.0 |
22.0–23.0 |
21.0–23.0 |
镍 Nickel (Ni) |
4.5–6.5 |
4.5–6.5 |
4.5–6.5 |
钼 Molybdenum (Mo) |
2.5–3.5 |
3.0–3.5 |
2.5–3.5 |
氮 Nitrogen (N) |
0.08–0.20 |
0.14–0.20 |
0.10–0.22 |
锰 Manganese (Mn) |
≤2.0 |
≤2.0 |
≤2.0 |
硅 Silicon (Si) |
≤1.0 |
≤1.0 |
≤1.0 |
磷 Phosphorus (P) |
≤0.030 |
≤0.030 |
≤0.035 |
硫 Sulfur (S) |
≤0.020 |
≤0.020 |
≤0.015 |
2. 机械性能 Mechanical Properties
性能 Property |
标准值 Typical Value |
抗拉强度 Tensile Strength |
≥620 MPa |
屈服强度 Yield Strength |
≥450 MPa |
延伸率 Elongation (50mm) |
≥25% |
硬度 Hardness (Rockwell C) |
≤32 HRC |
冲击功 Impact Energy (Charpy V, -40°C) |
≥45 J |
3. 物理性能 Physical Properties
性能 Property |
数值 Value |
密度 Density |
7.8 g/cm³ |
熔点 Melting Range |
1420–1465°C |
热导率 Thermal Conductivity (20°C) |
15 W/m·K |
电阻率 Electrical Resistivity |
0.80 μΩ·m |
4. 耐腐蚀性能 Corrosion Resistance
- 点蚀当量 PREN (Cr + 3.3Mo + 16N): ≥35
- 优异耐氯化物应力腐蚀开裂性能(优于304/316奥氏体不锈钢)。
- 适用于海水、化工、石油天然气环境。
5. 产品形式 Product Forms
- 板材 Plate
- 管材 Pipe & Tube
- 棒材 Bar
- 法兰 Flanges
- 锻件 Forgings
6. 应用领域 Applications
- 海洋工程 Offshore
- 化工设备 Chemical Processing
- 脱盐设备 Desalination
- 石油天然气 Oil & Gas
备注 Notes
- 以上数据基于标准条件,特殊要求需另行协商。
Data based on standard conditions, customized requirements are negotiable.