... bellows:1, A variety of stainless steel castings, middle-, low-alloy steel castings, normal carbon steel castings, graphite cast iron castings, ... precision castings;2,A variety of steel for steel ingots3,Large-scaled cast steel items and cast iron items (unit ... weight < 60 tons);4,Undertaking various treatments for steel (anneal, normalizing, temper, hardening, solution heat treatment, quenching ...