1/U channel bar 2/Standard ASTM, GB, JIS 3/Grade Q235 SS400, ... Gr.B 4Application machine struction ,boiler,boat,etc U channel barproduct name: Channel barstandard: JIS ,GB, ASTMGrade:SS400,Q235B A36 Gr.BSIZE ... /32C/36A/36B/36C/40A/40B/40C.we have above product"s mold now.if you need other or special specification ... ,then we could make the mold for production also. U channel bar