17-4 stainless steel for 17-4 include components which require high hardness and/or corrosion resistance at temperatures of up to . Specific applications for 17-4 include the petroleum and chemical industries, as well as use in aircraft parts. 17-4 stainless steel SAE type 630 stainless steel (more commonly known as 17-4; also known as UNS 17400) is a grade of martensitic precipitation-hardened stainless steel. It contains approximately 15–17.5% (17) chromium and 3–5% (4) nickel, as well as 3–5% copper. 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,
Stainless Steel Studios Stainless Steel's closure, Sierra closed "Empire Earth"s server, so it is impossible to play online or update the game. Stainless Steel Studios Stainless Steel Studios (SSSI) was a video game development company, started in 1997 by Rick Goodman and Dara-Lynn Pelechatz. The company was based in Cambridge, Massachusetts, and focused on the development of real-time strategy games. Stainless Steel was started in October 1997 by Rick Goodman and Dara-Lynn Pelechatz (Director of Operations). The name "Stainless Steel" was thought up by Rick Goodman on a returning flight from California. Dara-Lynn Pelechatz the Director of Operations said in an interview with