Duplex Steel

双相不锈钢是由奥氏体和铁素体两相组成的特种不锈钢,兼具高强度与优良的耐腐蚀性能。
Duplex stainless steel is a special stainless steel composed of austenitic and ferritic phases, combining high strength with excellent corrosion resistance.

Facebook
Twitter
LinkedIn

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

  1. 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.

Join Our Newsletter

Lorem ipsum dolor sit amet, consectetur adipiscing elit. Integer ac faucibus mi, et tempor eros. Donec in quam id lacus dignissim varius eu sed ex.