Cold drawn seamless steel pipe 1.Standard:gb/t3639 din2391 en10305 jis g 3473 2.Production method:cold drawn, cold rolled, finished rolling 3.Scope:out diameter:8-300mm wall thickness:1-20mm 4.Tolerance:od+/-0.1-0.2mm wt:+/-0.1-0.2mm 5.Material:astm a106b, st44, ck45 , q345b, 40mn4 smn420 30mn5 36mn5 20cr4 6.1cr4 15crmo5 20crmo5 25crmo4 42crmo4 and so on 7.Moq:5metric ton
