Patent ID: 7070663
Filing Date: 2006-07-04
Classification: C21D,C22C

Abstract:
1. A ferritic stainless steel having good machinability, comprising: a chemical composition comprising 0.001–0.1 mass % of C, Si up to 1.0 mass %, Mn up to 1.0 mass %, 15–30 mass % of Cr, Ni up to 0.60 mass %, 0.5–6.0 mass % of Cu, one or more of Sn and In not less than 0.005 mass % in total, and the balance being Fe except inevitable impurities; and a structure having Cu-enriched particles with a concentration of Sn and/or In not less than 10 mass %, said particles being dispersed at 0.2 vol. % or more in a ferritic matrix.