Percipitation Hardened Stainless Steel 11-10PH / 13-8PH / 15-5PH / 17-4 PH / 17-7PH / 08X14H7M / Custom 450, Custom 465 Products

SAE Type 630 stainless steel is a type of martensitic precipitation-hardened stainless steel that is more often called 17-4 PH or just 17-4. It is also known as UNS S17400. It has between 15–17.5% chromium, 3–5% nickel, and 3–5%, copper. It gets its name from the fact that it is made up of about 17% chromium and 4% nickel. 17-4 stainless is martensitic stainless steel that gets stronger with age and is also resistant to corrosion. A short, simple, and low-temperature treatment are all it takes to make something harder. 17-4 is much easier to weld than most martensitic stainless steels, like type 410. Because it is strong, doesn’t rust, and is easy to work with, 17-4 stainless can be a cheaper alternative to high-strength carbon steels and other stainless grades. When the metal is heated to 1900°F for solution treatment, its structure is austenitic, but when it cools to room temperature, its structure changes to a low-carbon martensitic structure. This change won’t be done until the temperature goes down to 90°F. The alloy gets stronger when it is heated to temperatures between 900 and 1150°F for one to four hours. This process of hardening also tempers the martensitic structure, making it more flexible and tough.

Common Trade Names

17-4 Stainless

Gate Valves Chemical Processing Equipment Pump Shafts Gears Ball Bearings Bushings Fasteners

15-5 PH stainless steel is a martensitic precipitation-hardening stainless steel with about 15% Chromium and 5% Nickel. It is very strong, very hard, and resists corrosion very well. A single heat treatment at a low temperature can add more strength. Compared to 17-4 PH, it has better transverse toughness and ductility, better mechanical properties in larger cross-sections, and better forgeability. It is easy to join together. It can be machined in any of the different temperatures that this grade can handle.

Common Trade Names

PH15-5 XM-12 UNS S15500 15Cr-5Ni DIN X4CrNiCuNb164 X5CrNiCu15-5 DIN 1.4540 DIN 1.4545 SAE 15-5

Applications

Aerospace structural components Valves Gears and Shafts Oil and Gas components Nuclear reactor components