... middle-, low-alloy steel castings, normal carbon steel castings, graphite cast iron castings, wearable/heat-resistant alloy castings and 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, ...