... , 4137, 42CrMo, 4140, SCM440, 20CrMnMo3) All the materials are according to GB, JIS, ISO, ANSI, ASTM, BS, DIN, etc. Standard which ... 100% L/C.10) Packaging detail: suitable for sea freight and according to customer’s requirement. As long as you require, we ... 5 years experience of manufacturing forgings.This forging is exported to USA. Forging steel Valve P91