Industrial metal background

SS431 Stainless Steel Round Bar Supplier | AISI 431 / UNS S43100 Martensitic Shafting Bar

不锈钢棒材
SS431 stainless steel round bar supplied by Shanghai Vertex Alloy Co., Ltd — AISI 431 / UNS S43100 / EN 1.4057 / SUS431 / GB 14Cr17Ni2 nickel-bearing martensitic stainless shafting bar with 850–1,000 MPa tensile strength and the best corrosion resistance of the martensitic grades.
1/5

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 SpecAMS 5628

化学成分

元素数值
Cr15.00–17.00
Ni1.25–2.50
C≤ 0.20
Mn≤ 1.00
Si≤ 1.00
P≤ 0.040
S≤ 0.030
FeBalance

机械性能

性能数值
Tensile Strength850–1,000 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