Project 70+® Custom 630 Stainless
(UNS S17400)
Single Figures are Maximums
0.07 C, 1.00 Mn, 0.030 P, 0.030 S, 1.00 Si, 15.00/17.50 Cr, 3.00/5.00 Ni, 3.00/5.00 Cu, 0.15/0.45 Nb+Ta, Bal. Fe
Project 70+® Custom 630 (17Cr-4Ni) stainless is an improved-machining version of conventional Stainless Type 17Cr-4Ni.
This alloy is a martensitic precipitation/age-hardening stainless alloy offering high strength and hardness along with excellent corrosion resistance. Customers have reported that Project 70+ Custom 630 (17Cr-4Ni) stainless offers significantly improved machinability characteristics over generic Stainless Type 17Cr-4Ni. This includes up to 15% and higher machining speeds with improved finishes and longer tool life.
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