42crmo4 alloy steel round bars diameter:6-200mm,length:1m- ... ,etc we export 8000tons in 2011. Description42 crmo4 alloy steel round barsMaterial201,202,304,304L,309S,310S,316,321 ... high temperature resistant, low temperature resistant, corrosion resistant seamless steel pipe used. Our company has cooperative relation between the ... give you best-discount prices,feel free. 42crmo4 alloy steel round bars