The Grades of Stainless Steel Austenitic Grades – JSLU DD, JSU SD, JSLU 204CU, JT, J4, 304, 304L, 304H, 316, 316L, 316H etc Ferritic Grades – 409, 409L, 410S, 430, Martensitic Grades – 410, 420, 431 Ferritic + Martensitic Grade – 409M