... AISI, ASTM, DIN, GB, BS, JIS,NF Investment Casting of Steel Bent Axle / Crankshaft 1.Quality system certificate: ISO 90002. ... , Precision Casting, Gravity Casting, CNC Machining 9. Material: Carbon Steel , Alloy Steel, Stainless Steel, Gray Iron, Ductile Iron, Aluminum, ect . 10. Surface ... specifications and samples are welcome for customized. Investment Casting of Steel Bent Axle / Crankshaft