1.hot rolled channel steel 2.length:6m ,9m ,12m 3.material:Q195,Q215,Q235,SS400,SS540,A36 (1)size:50*25*3mm-300 ... *90*9mm(2)material:Q195 Q215 Q235 Q345 A36 SS400 SS540(3)length:6m,9m,12mGB standard channel ... /m 40#c40010414.571.488kg/m gb standard hot rolled channel steel