SAE steel grades - Wikipedia, the free encyclopedia
Type 630 is most common PH stainless, better known as 17-4; 17% chromium, 4% nickel. 650 through 653: Austenitic steels strengthened by hot/cold work. 660 through 665: Austenitic superalloys; all grades except alloy 661 are strengthened by second-phase precipitation. Type 2205—the most widely used duplex (ferritic/austenitic) stainless steel ...