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17-4PH AMS 5643 Overview & Composition

AMS 5643 Specification 17-4PH Stainless Steel

Stainless Steel Bars. Stainless Steel Wire. Stainless Steel Forgings. Stainless Steel Tubing. Stainless Steel Rings. 16 Cr, 4.0 Ni, 0.30 CbTa, 4.0 Cu.

17-4PH stainless steel is a precipitation-hardening stainless steel known for high strength, corrosion resistance, and mechanical properties in ambient and elevated temperatures.

Its composition includes: 16% Cr, 4% Ni, 4% Cu, and 0.30% Nb/Ta.

17-4PH Stainless Steel in AMS 5643 Specification, per SAE International:
“This specification covers a corrosion-resistant steel in the form of bars, wire, forgings, mechanical tubing, flash welded rings, and stock for forging, flash welded rings, or heading.”

Solution-heat treated. Precipitation hardenable stainless steel.

What Are 17-4PH Stainless Steel’s Uses?

  • High tensile and yield strength in aged conditions
  • Corrosion resistance in marine & industrial atmospheres
  • Maintains strength and hardness up to 600 °F (316 °C)
  • Dimensional stability during heat treatment
  • Magnetic in all conditions

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