astm a351 cf8m تضمینی با کیفیت بالا
ASTM A351 is for casting (e.g. valves). 316 grades within ASTM A351 are designated (I believe) ASTM A351 CF8M. Same approach counts for EN-standards, but they work with werkstoffnumbers (e.g. EN 10222-5 1.4404 would be a 316 forging, for e.g. a flange)