概述
AISI 431 is a martensitic stainless steel plate containing 15–17% chromium and 1.25–2.50% nickel. It is a heat-treatable (hardened and tempered) stainless steel that offers an excellent combination of high strength, good hardness, moderate corrosion resistance, and superior toughness — notably better toughness than other martensitic grades like 410 and 420, thanks to its nickel addition.
描述（英文）
AISI 431 is a martensitic stainless steel plate containing 15–17% chromium and 1.25–2.50% nickel. It is a heat-treatable (hardened and tempered) stainless steel that offers an excellent combination of high strength, good hardness, moderate corrosion resistance, and superior toughness — notably better toughness than other martensitic grades like 410 and 420, thanks to its nickel addition.
尺寸范围
- Up to 150mm
牌号标准
| 标准体系 | 数值 |
|---|---|
| 🇺🇸 UNS | S43100 |
| 🇺🇸 AISI | 431 (Type 431) |
| EN / DIN | 1.4057 (X17CrNi16-2) |
| 🇯🇵 JIS | SUS431 |
| 🇨🇳 GB | 14Cr17Ni2 (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 | 655 MPa (95 ksi) |
| Yield Strength Rp0.2 | 415 MPa (60 ksi) |
| Elongation A | 20% |
| Hardness | ≤ 295 HB |
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