17-4PH Round bar

ASTM A564 17-4PH AISI 630 AMS 5643 UNS S17400 Round bar Manufacturer in China We are  a professional manufacturer of stainless steel 17-4PH bars, stainless steel round bars supplier in China.  ASTM A564/A564M specification for hot-rolled and cold-finished precipitation-hardening stainless steel bars. It is widely used for its excellent combination of strength, corrosion resistance. 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.[1] 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.