431 Stainless Steel Round Bar

431 stainless steel round bars offer a combination of corrosion resistance, high strength, and machinability, making them suitable for a wide range of industrial applications.

With proper heat treatment, they can achieve excellent mechanical properties, making them a preferred choice in demanding environments where both corrosion resistance and high mechanical performance are required.

Chemical Composition (in %):

Physical Properties:

• Density: 7.8 g/cm³
• Melting Point: 1400-1425°C (2550-2600°F)
• Specific Heat Capacity: 460 J/kg·K (0-100°C)
• Thermal Conductivity: 24.2 W/m·K (100°C)

Mechanical Properties:

• Tensile Strength: 850-1000 MPa (123-145 ksi)
• Yield Strength (0.2% Offset): 655 MPa (95 ksi)
• Elongation at Break: 20% (in 50mm)
• Hardness, Rockwell C: 25-30 HRC

Features:

• Martensitic stainless steel with excellent corrosion resistance and high toughness.
• Offers a combination of strength, hardness, and ductility suitable for various applications.
• Can be heat treated to achieve desired mechanical properties, such as increased hardness and strength.
• Widely used in applications requiring high strength, such as shafts, gears, fasteners, and valves in the aerospace, automotive, and marine industries.
• Offers good resistance to corrosion in mild environments and can withstand moderate exposure to corrosive chemicals.
• Machinable in the annealed condition, but may require post-machining heat treatment to achieve optimum properties.
• Suitable for applications requiring both corrosion resistance and high mechanical performance.

Heat Treatment:

• Annealing: Heat to 900-1100°C (1650-2010°F), followed by air cooling or furnace cooling to obtain a maximum hardness of 269 HB.
• Hardening: Heat to 980-1065°C (1800-1950°F), followed by oil or air quenching to achieve desired hardness.
• Tempering: Heat to 200-700°C (390-1290°F) depending on the desired hardness level, followed by air cooling.