... 3.Material:Q195,Q235,Q345,A36,ss400,st37-2 u channel upn steel channel / steel channel1.ISO9001 Quality System Certificate 2.Got nine countries factory ... approvalWe offer high quality channel steel 1.Material: Q235,Q345,SS400,Q195,SS400,ASTMA362.Specification: ... 0086-133-0315-0781Skype: summeryinguangfasteel Fax: 0086-0315-2247325 u channel upn steel channel