Stainless steel Valve accessory 1) Process; Hot forging 2) Material: Inconel 718, inconel 625, monel, hastelloy etc alve ... Main material of our forgings include various superalloys and duplex stainless steels. eg. Inconel, Monel, Incoloy, Hastelloy, and ... stainless steels. The main materials include Nickel-base alloys, Iron-base alloys, and Cobalt-base alloys ,etc. Stainless steel Valve accessory 2