Stainless Steel Alloy 17-4 PH UNS S17400

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

Yuze Metal 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.

Common Surfaces

Stainless Steel Standards Comparison Table