Cast Iron  stockholders and suppliers, delivering to the whole of the UK. Cast Iron bar is supplied conforming to designations BS1452 and BS EN 1561. West Yorkshire Steel are suppliers of continuous cast iron round bar and flat bar. Continuously cast iron bar provides consistent mechanical properties with good machineability to produce a good surface finish. It has a microstructure that consists of graphite nodules in a solid metal matrix, similar to that of carbon steel. With its dense homogeneous structure cast iron bar provides good mechanical properties such as strength and wear resistance. The graphite structure gives it higher noise and vibration damping capacity than that of a carbon steel. Also known as grey iron or ductile iron, cast iron weighs approximately 10% less than that of steel.