Обзор
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.
Описание (Английский)
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.
Диапазон Размеров
- Up to Φ500 mm+ (forged)
- Custom from 50 mm to 12,000 mm
Спецификация Марки
| Система | Значение |
|---|---|
| 🇺🇸 UNS | S43100 |
| 🇪🇺 EN | 1.4057 (X17CrNi16-2) |
| 🇩🇪 DIN | 1.4057 |
| 🇯🇵 JIS | SUS431 |
| 🇨🇳 GB | 14Cr17Ni2 (S43110); old: 1Cr17Ni2 |
Химический Состав
| Элемент | Значение |
|---|---|
| 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 |
Механические Свойства
| productCenter.property | Значение |
|---|---|
| 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 |
Физические Свойства
| Свойство | Единица | Значение |
|---|---|---|
| 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 |
Применение
- Marine & Shipbuilding
- Aerospace
- Oil & Gas
- Automotive
- General Engineering
- Chemical Processing
- Food Processing
- Defense / Military
- Paper & Pulp
- Medical / Surgical