As a standard, AIL Valves are made in Carbon Steel to ASTM A216 Gr. WCB. For valves in other materials and for accessories like gear operation and electrical actuators, suffix suitable abbreviations to the above ordering code such as : WC6 for ASTM A217 Gr. C6 WC9 for ASTM A217 Gr. WC9 LCB for ASTM A352 Gr. LCB LCC for ASTM A352 Gr. LCC C5 for ASTM A217 Gr. C5 C12 for ASTM A217 Gr. C12