17-4 PH, also known as UNS S17400, is a martensitic precipitation-hardening stainless steel. 17-4 PH is popular with our customers due to its excellent combination of good corrosion resistance and high strength. In order to be considered 17-4 PH, an alloy must be made of a unique set of chemical elements:
- Fe Balance
- Cr 15-17%
- Ni 3-5%
- Cu 3-5%
- Mn 1.5% max
- Si 0.7% max
- Nb 0.45% max
Because of 17-4 PH’s unique composition, it has a number of different benefits including offering an excellent combination of oxidation and corrosion resistance along with good mechanical properties at temperatures up to 600°F (316°C). A wide variety of industries utilize the toughness and strength of 17-4 PH. Design engineers in the aerospace, chemical, food processing, metalworking, paper and pulp, and petrochemical industries use 17-4 PH to create:
- Fasteners
- Gears
- Castings
- Fittings
- Marine Parts (propeller shafts, sailboat self-steering systems)
- Molding dies
- Nuclear waste casks
- Turbine blades
- Valves
Continental Steel is proud to be a distributor of 17-4 PH stainless steel in a number of different shapes and sizes, all of which meet the toughest industrial standards.