440A, 440B, 440C


Common elements across all 440 steels:

  • 16-18% chromium
  • 1% Manganese
  • 1% silicon
  • 0.75% Molybdenum
  • 0.04% Phosphorus
  • 0.03% sulfur
  • Some percentage of Carbon

440A steel

  • 0.6-0.75% Carbon

440B steel

  • 0.75-0.95% Carbon

440C steel

  • 0.95-1.20% Carbon