... machinery, automobile, ships, petroleum machinery, agricultural machinery, construction, valve and pumps etc. Raw material: SS304, SS316, SS316L, CF ... , 45# etc. Casting Process: Colloidal Silica Process of Lost Wax Investment Casting Quality certification: Got ISO9001:2001; Applying for ... is as below: Investment Casting Shell Mould Casting Lost Wax Colloidal Silica Stainless Steel Valve Body Parts