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Elements (Max.) Carbon Chromium Manganese Nickel Phosphorus Copper Sulfur Columbium plus Tantalum Silicon Nitrogen 0.07 15.00 - 17.50 1.00 3.00 - 5.00 0.04 3.00 - 5.00 0.03 0.15- 0.45 1.00 .045
Type 17-4 PH is a precipitation-hardening martensitic stainless steel. It contains 17% chromium and 4% nickel and is normally superior in corrosion resistance to the regular martensitic chromium types. An addition of 4% copper is used to promote its precipitation hardening capacity. 17-4 PH can be hardened by a low cost heat treatment consisting only of holding the steel at 900 Deg. F for one hour, thereby minimizing scaling and distortion and allowing parts to machine to close tolerances prior to heat treatment. 17-4 is magnetic in both the solution annealed and hardened conditions.
Applications: 17-4 PH is used in a wide variety of applications because of its unique combination of advantages where high strength and hardness are a must, 17-4 PH provides those properties plus the added benefited excellent corrosion resistance. Or for applications requiring excellent corrosion resistance 17-4 PH gives the extra advantages of high strength and hardness. It's ideal for boat shafts, pump shafts, valve gated, plugs, seats, stems and trim, springs, gears, fasteners, chains, mixing equipment, aerospace applications such as hydraulic actuators, structural components, fasteners,connectors in high pressure systems, cutter blades, racing car parts and oil field equipment. Registered Trade-Mark of Armco Steel Corporation.