1.Application: Marine and locomotive turbocharger parts, aviation turbojet engine spare parts, gas turbine parts, aero engine turbine parts.. 2. Stainless steel alloy: 301, 304, 304l, 309, 309s, 316, 316l... Heat resistent alloy: k418, k465, in718, in738c, in738lc... 1.3 casting surface: 1.6-3.2um. 3. Test machine: 3.1destructive test 1. Tensile strength test 2. Creep strength test 3. Hardness test 4. Metallography test 5. Chemical composition 3.2 non-destructive test 1. Visual inspection 2. Fpi 3. X-ray 4.Size testing