概述
AISI 431 is a martensitic stainless steel round bar product characterized by its ability to be heat-treated to high hardness and strength levels. Containing both chromium and nickel, it offers a superior combination of toughness, corrosion resistance, and mechanical properties compared to other martensitic grades such as 410 and 420. It is widely used for shafts, fasteners, and components requiring high strength with moderate corrosion resistance.
描述（英文）
AISI 431 is a martensitic stainless steel round bar product characterized by its ability to be heat-treated to high hardness and strength levels. Containing both chromium and nickel, it offers a superior combination of toughness, corrosion resistance, and mechanical properties compared to other martensitic grades such as 410 and 420. It is widely used for shafts, fasteners, and components requiring high strength with moderate corrosion resistance.
尺寸范围
- Up to Φ500 mm+ (forged)
- Custom from 50 mm to 12,000 mm
牌号标准
| 标准体系 | 数值 |
|---|---|
| 🇺🇸 UNS | S43100 |
| 🇪🇺 EN | 1.4057 (X17CrNi16-2) |
| 🇩🇪 DIN | 1.4057 |
| 🇯🇵 JIS | SUS431 |
| 🇨🇳 GB | 14Cr17Ni2 (S43110); old: 1Cr17Ni2 |
化学成分
| 元素 | 数值 |
|---|---|
| C | ≤ 0.20 |
| Si | ≤ 1.00 |
| Mn | ≤ 1.00 |
| P | ≤ 0.040 |
| S | ≤ 0.030 |
| Cr | 15.0 – 17.0 |
| Ni | 1.25 – 2.50 |
| Mo | - |
| Fe | Balance |
机械性能
| productCenter.property | 数值 |
|---|---|
| Tensile Strength Rm(annealed) | 750 – 950 MPa |
| Yield Strength Rp0.2(annealed) | 450 – 600 MPa |
| Elongation A | 15 – 20% |
| Hardness | 220 – 280 HB |
| Impact Toughness | Moderate |
物理性能
| 性能 | 单位 | 数值 |
|---|---|---|
| Density | g/cm³ | 7.70 – 7.75 g/cm³ |
| Melting Point Range | °C | ~1,420 – 1,510 °C |
| Modulus of Elasticity | GPa | 200 GPa |
| Shear Modulus | - | 77 GPa |
| Poisson's Ratio | - | 0.30 |
| Thermal Conductivity (20°C) | W/m·K | 25 – 30 W/(m·K) |
| Coefficient of Thermal Expansion (20–100°C) | ×10⁻⁶/K | 10.0 – 11.0 ppm/°C |
| Specific Heat (20°C) | J/kg·K | 0.46 kJ/(kg·K) |
| Electrical Resistivity | μΩ·cm | ~0.70 μΩ·m |
| Magnetism | - | Strongly magnetic (ferromagnetic |
应用场景
- Marine & Shipbuilding
- Aerospace
- Oil & Gas
- Automotive
- General Engineering
- Chemical Processing
- Food Processing
- Defense / Military
- Paper & Pulp
- Medical / Surgical