17-4 PH Solution Treated - Stainless Steel - Fry Steel

Stainless Steel / 17-4 PH SOL

17-4 is a martensitic precipitation hardened stainless steel. The name comes from the chemical makeup which is approximately 17% chromium and 4% nickel. SAE Type 630 or Alloy 630 stainless steel is the same as 17-4PH, and they both refer to the same grade. 17-4 can be heat treated to high levels of strength and hardness, and features corrosion resistance and machinability comparable to austenitic 304 stainless. Being martensitic, 17-4 is magnetic. 17-4 is capable of being hardened up to approximately 44 Rc when heat treated to condition H900. (UNS S17400)

Chemical Makeup of 17-4 PH Stainless Steel

Element Min Max
Carbon, C 0.07
Manganese, Mn 1
Silicon, Si 1
Sulfur, S 0.03
Phosphorus, P 0.04
Chromium, Cr 15 17.5
Molybdenum, Mo - 0.5
Nickel, Ni 3 5
Columbium (Niobium), Nb 5xC 0.45
Copper, Cu 3 5

Common Applications of 17-4 Stainless Steel

  • Aerospace Aerospace
  • Medical Medical
  • Industrial Industrial

Benefits

  • Good Corrosion Resistance
  • Formability & Weldability
  • High Strength & Hardness

We stock 17-4 PH SOL to the following specifications:

  • AMS-2303
  • AMS-5643
  • ASTM-A-484
  • CAP. ASME-SA-564 TYPE 630
  • CAP. ASTM-A-564 TYPE 630
  • CAP. OF MBO-160-003

Click on a cross-section to see the sizes we stock:

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