... ,aluminum,alloy,iron etc. 2. Precision Casting,lox wax casting,investment casting 3.OEM Precision Casting,lox wax casting Casting: investment casting ,precision casting, lost wax casting ,soluble glass process complex shell process ... strength. ,yield stress ,notched bar impact tenacity, x-ray,metallograph.Quality control: According to ISO 9001 2001 Precision Casting,lox wax casting