C steel channel dimensions 1.Standard:AISI,ASTM,JIS,DIN,GB 2. ... : bright,polished,hot rolled 3.size from:50x25 TO 300X90 C steel channel dimensions1.Standard:AISI,ASTM,JIS,DIN,GB2.Surface: bright ... company was established in 2004;(2)is a manufacturer of steel with well-equipped testing equipment and strong technical force;(3 ...