17-4 stainless steel

Precipitation hardened stainless steel SAE Type 630 stainless steel (more commonly known as 17-4 PH, or simply 17-4; also known as UNS S17400) is a grade of martensitic precipitation hardened stainless steel. It contains approximately 15–17.5% chromium and 3–5% nickel, as well as 3–5% copper.Type 630; 17 Cr-4 Ni; UNS 17400 http://www.outokumpu.com/SiteCollectionDocuments/Outokumpu-martensitic-grade-630-data-sheet.pdf Outokumpu.com June 5, 2016 https://web.archive.org/web/20151223134030/http://www.outokumpu.com/SiteCollectionDocuments/Outokumpu-martensitic-grade-630-data-sheet.pdf December 23, 2015 dead The name comes from the chemical makeup which is approximately 17% chromium and 4% nickel. SUS630 is the same as 17-4PH, and they both refer to the same grade. SUS 630(17-4PH) http://www.atlassteels.com.au/documents/Atlas%20Grade%20datasheet%20630%20rev%20May%202008.pdf Atlas Steels April 23, 2021 Properties 17-4 stainless steel can be heat treated to approximately 44 Rc, and an ultimate tensile strength of 190000 psi MPa flip. Its density ranges from 0.282 to 0.284 lb/in3 kg/m3 flip, and its modulus of elasticity ranges from 28.5 to 30.0 e6psi GPa flip. MIL-HDBK-5J United States Department of Defense 31 January 2003 2-195 The corrosion resistance and machinabilityNorth American Stainless – Long Products Stainless Steel Grade Sheet http://www.northamericanstainless.com/wp-content/uploads/2010/10/Grade-630-17-4.pdf North American Stainless June 5, 2016 of 17-4 are comparable to austenitic 304 stainless steel. 17-4 is magnetic due to its martensitic structure. Overaging (aging beyond the peak strength condition) improves resistance to stress corrosion cracking.http://www.dtic.mil/dtic/tr/fulltext/u2/709044.pdf https://web.archive.org/web/20150906080339/http://www.dtic.mil/dtic/tr/fulltext/u2/709044.pdf dead September 6, 2015 Stress Corrosion Properties of High-Strength Precipitation Hardening Stainless Steels in 3.5% Aqueous Sodium Chloride Solution September 6, 2016 Applications 17-4PH is used in applications requiring high strength, hardness, and corrosion resistance up to 600 F C flip 1. It is commonly used in the aerospace industry for its high strength, and in marine applications for its corrosion resistance, although it can be susceptible to crevice corrosion in stagnant salt water. It is also used in the petroleum, chemical, medical device and firearm industries. Composition + Proportion by mass (%) C Mn P S Si Cr Ni Cu Nb, Ta Fe 0.07 max. 1.0 max. 0.04 max. 0.03 max. 1.0 max. 15.0–17.5 3.0–5.0 3.0–5.0 0.15–0.45 balance References External links Category:Stainless steel