... steel ,tool steel ,brass and aluminum ,according to DIN ,EN, ASTM, BS,JCSI.Piece numbers: small, medium and large series ... . Computerised numerical. Control measuring ,machining ,pressure inspection up to 200bars ,mechanical values for tensile strength. ,yield stress ,notched ... tenacity, x-ray,metallograph.Quality control: According to ISO 9001 2001 stainless steel spiders,curtain walls spider