En31 Alloy Steel Forged Hollow Bar Pipe

Product Description

• Composition:

  • Carbon: 0.90-1.20%
  • Chromium: 1.00-1.60%
  • Silicon: 0.10-0.35%
  • Manganese: 0.30-0.75%
  • Sulfur (max): 0.050%
  • Phosphorus (max): 0.050%

• Applications:

  • EN31 steel is commonly used for forged pipes in various industrial applications.
  • Typical uses include taps, gauges, swaging dies, ejector pins, and ball and roller bearings.

Forging Process:

• Heat slowly to 1000-1050C for forging.
• Ensure thorough soaking at the forging temperature.
• Reheat as needed to maintain a temperature above 850C.

Heat Treatment:

• Annealing: EN31 is usually supplied in the annealed and machineable condition. Re-annealing is necessary only if the steel has been forged or hardened.
  • Heat to 800-810C, soak well, and allow to cool in the furnace.
• Stress Relieving: Beneficial before hardening, especially for heavily machined parts.
  • Heat carefully to 700C, soak well, and cool in air.
• Hardening: Heat to 800-820C, soak thoroughly, and quench in oil.
• Tempering: Temper between 150C and 300C, adjusting based on tool requirements.