steel ship hatch cover material:steel, aluminium type:various accessory:as per buyer's requirement The steel hatch cover is design and produce ... in metal casting of aluminum, bronze, copper, iron, steel and other metals, in a wide range of size and ... ANSI, BS, DIN, JIS & etc.Material:Aluminium, Brass, Carbon steel, Stainless steel, Alloy metal & etc. Equipment:CNC lathe, processing center, miller ...