... sand casting condition: fully machined test: dynamic testing machine brake disc1) materials: grey iron, ductile iron, stainless steel ... etc.6) testing equipment(foundy used):elongation tester,hardness tester,metallographic microscope,spectrometer,PC thermometer,CE NSP-550CS ... .6 Taiping Industrial Zone, Pulandian City, Dalian, China 116023Office Address: Room 2308,jinchen International Building,No.570 ...