... GB, EN, etc. The material contain various kinds of high quality carbon steel, alloy steel, tool steel, ... furnace(LF)+vacuum degassing(VD)+electroslag remelting+fast forging+annealing( normalizing)+heat-treatment+machining".Main specification ... ' requestvarious stepped shaft, transmission shaft, screw rodhot forging modules80-1000as clients' requestvarious modulesPipe seriesdiameter≤1200length≤10000as ...