1.green sand casting 2.Your specification and drawings are welcomed ... , varnishing, bromzing. Passivating, grinding, polishingAnalysis wet chemically or by x-ray spectrometer. 3-coorcdinate. Computerised numerical. Control measuring ,machining ,pressure ... for tensile strength. ,yield stress ,notched bar impact tenacity, x-ray,metallograph.Quality control: According to ISO 9001 2001 Green Sand Casting