1)good quality and competitive price 2)we have certification of ... 18 cold rolling mils, 20 cold drawn machine, hot punch and on . 1 Good of description a) Cold drawn seamless ... Alloy steel: 30CrMo,16Mn(st52,Q345,E355),25Mn,37Mn5 and so on 4 Length: as per customers’ requirements5 Tolerance ... high strength tube bearing d) formable tubes for machine and vehicles 6)hydraulic lines 20#(st45, E255, CK20) ...