42crmo4 alloy steel round rods diameter:6-200mm,length:1m-6m grade:201,304,321, ... ,310,430,etc we export 1000tons in 2011. Description42 crmo4 alloy steel round rodsMaterial201,202,304,304L,309S,310S,316,321,etcDiameterFrom ... industry,electric power, boiler, high temperature resistant, low temperature resistant, corrosion resistant seamless steel pipe used. Our company has cooperative relation between ...