Grey Iron Casting Pump Body Material:Grey iron,ductile iron Process:lost foam ... ,normal lathe, line cutter etc.7. Testing equipment (foundry used): elongation tester, hardness tester, metallographic microscope, spectrometer, PC thermometer ... equipment, chemistry composition analysis room. Testing equipment (machine shop used): vernier caliper, depth caliper, micrometer, depth micrometer, raius caliper ...