Engine Valve Steel Bars 1.valve steel manufacturer 2.can be customized 3.latest production equipment 4.4.8-12.7mm 45Cr14Ni14W2Mo engine valve steel bars for car standards: ASTM,GB,EN,JIN diameter:4.8mm-12.7mmuses: inlet and exhaust valves of cars ,light trucks, mini trucks, motorcycles, heavy trucks, tractors, diesel locomotives, generators ,ships, etc.quotation need data:material+diameter+ ...