... BS,JCSI.3. Piece numbers: small, medium and large series.4. Process: cast, machining, turning, milling, drilling, ... bromzing. Passivating, grinding, polishing6. Analysis wet chemically or by x-ray spectrometer. 3-coorcdinate. Computerised numerical. Control measuring ,machining , ... strength. ,yield stress ,notched bar impact tenacity, x-ray,metallograph.7. Quality control: According to ISO 9001 ...