不锈钢棒材

产品描述
上海顶点合金有限公司(Shanghai Vertex Alloy Co., Ltd,简称 Vertex Alloy)供应 431 不锈钢圆棒(SS431 / AISI 431 / UNS S43100 / EN 1.4057 X17CrNi16-2 / JIS SUS431,国标对应 14Cr17Ni2,原 1Cr17Ni2)。431 是加镍马氏体不锈钢,铬 15–17%、镍 1.25–2.50%,在马氏体不锈钢中耐蚀性最佳(接近 304),调质态抗拉强度 850–1000 MPa,兼具良好的冲击韧性,最高可淬至约 50 HRC,是泵轴、螺旋桨轴、阀杆、高强度紧固件等承力传动件的经典牌号。执行 ASTM A276/A479 标准,直径 8–300mm 轧制/锻造圆棒,退火或调质态,附 EN 10204 3.1 材质证明,可定尺切割。
尺寸范围
- OD:8–300 mm
- L:3,000–6,000 mm
牌号标准
| 标准体系 | 数值 |
|---|---|
| USA (AISI/ASTM) | 431 (SS431) |
| 🇺🇸 UNS | S43100 |
| Europe (EN) | 1.4057 / X17CrNi16-2 |
| Japan (JIS) | SUS431 |
| China (GB) | 14Cr17Ni2 (formerly 1Cr17Ni2) |
| Bar Standard | ASTM A276 / A479 |
| Aerospace Spec | AMS 5628 |
化学成分
| 元素 | 数值 |
|---|---|
| Cr | 15.00–17.00 |
| Ni | 1.25–2.50 |
| C | ≤ 0.20 |
| Mn | ≤ 1.00 |
| Si | ≤ 1.00 |
| P | ≤ 0.040 |
| S | ≤ 0.030 |
| Fe | Balance |
机械性能
| 性能 | 数值 |
|---|---|
| Tensile Strength | 850–1,000 MPa |
| Yield Strength (0.2%) | ≥ 650 MPa |
| Elongation (50 mm) | 15–20% |
| Hardness | 28–35 HRC (max 302 HB) |
| Impact Energy (Charpy V) | ≥ 39 J |
| Max Hardness (hardened) | ≈ 50 HRC |
物理性能
| 性能 | 单位 | 数值 |
|---|---|---|
| Density | - | 7.80 g/cm³ |
| Elastic Modulus (25°C) | - | 210 GPa |
| Thermal Conductivity (100°C) | - | 24.9 W/(m·K) |
| CTE (0–315°C) | - | 10.8 × 10⁻⁶ /K |
| Scaling Resistance | - | 925°C intermittent / 870°C continuous |
| Magnetic | - | Yes |
应用场景
- Marine:Propeller shafts;Marine hardware
- Pumps & Valves: Pump shafts;Valve stems, spindles
- Aerospace:Turbine blades;Structural fasteners
- Oil & Gas:Valve parts, drilling equipment components
- Pulp & Paper:Beater bars, doctor blades
- Automotive:Suspension & steering components
- Machine Tools:Spindles, lead screws
- General: High-strength bolts, studs

