The standards for stainless steel turned parts are mainly determined by their material grade, application, and manufacturing process.
GB/T 1220-2007 "Stainless Steel Bars": Applicable to hot-rolled or forged stainless steel bars, it is the most basic raw material standard for turned parts, covering requirements for chemical composition, mechanical properties, surface quality, etc.
GB/T 14975-2002 "Seamless Stainless Steel Tubes for Structural Use": This standard applies if the turned parts are processed from stainless steel tube blanks.
GB/T 14976-2025 "Seamless Stainless Steel Tubes for Fluid Transportation": The latest version was released in 2025, imposing higher requirements on dimensional accuracy, chemical composition, mechanical properties, and non-destructive testing, applicable to high-precision turned pipe fittings.
ASTM A276/A276M: American Society for Testing and Materials (ASTM) standard, applicable to stainless steel bars and profiles, commonly used in export or foreign-invested projects
ASTM A582/A582M: Standard specifically for free-machining stainless steel bars, applicable to free-machining grades such as 303 and 303Cu.
