... machinery part: 1.OEM services & samll qty 2.Own R&D construction machinery part mold 3.casting for 15 years Description ... steel such as 304, 316, 25#, 45#, 40Cr,ect.R&D capacity:Professional tooling development & process & designProduction Equipments:Three lost wax ... door frames, steel castings of up to 300 kg and aluminium castings of up to 30 kg. It is generally more expensive per ...