... internal structure and mechanical properties Machining Be made by forging process, it hold good internal structure and mechanical propertities. ... SAE,DIN or special requirements from Customers.1) Chain wheel, gear wheel, sheave, idler wheel, platen, winding drum, helm ... valve body etc. for petrochemical industry working.(5) Gear, Bull Gear, axial seat, big shaft, block, module etc.(6) Fire grate car, ...