AF-9628

AF-9628 is a high-strength, high-performance low alloy steel developed by the US Air Force. It develops a good combination of strength and toughness at -40°F without the use of high cost alloying elements.

Type Analysis

  • Carbon (Nominal) 0.28
  • Phosphorus (Maximum) 0.015
  • Silicon (Maximum) 1.25
  • Nickel (Maximum) 3
  • Manganese (Maximum) 1
  • Sulfur (Maximum) 0.02
  • Chromium (Nominal) 2.5
  • Molybdenum (Maximum) 1
  • Iron (Maximum) Balance
  • Iron (Nominal) 0.02
  • Calcium (Nominal) 0.025
  • Aluminum (Nominal) 0.15
  • Nitrogen (Maximum) 0.15 max
  • Zirconium (Nominal) 0.2

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Applicable Specifications

Bar

Rounds

Billet

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