A surname is the fixed name or last name or family name that is common in the names of all family members, and is shared by all. This is very old, and no one in the family really knows about the origin of this name.
ASTM A216 Carbon steel castings, suitable for fusion welding for high temperature service. ASTM A216: WCA ASTM A216: WCB ASTM A216: WCC ASTM A217 Martensitic stainless and alloy steel castings for pressure containing parts, suitable for high-temperature service.
A severity level â2â or â3â may also follow the symbol, but is not required. (704.8.2.1 & F2) ï· âOXâ indicates the material has oxidizing properties that present a combustion hazard. ï· âSAâ denotes gases which are simple asphyxiants; (limited to nitrogen, helium, neon, argon, krypton, and xenon).