... > Standard : GB ,JIS 3> Grade:Q235B SS400 Q345B Hot Roll U-channel---Usage(1) building , bridge ,high way (2). Some kinds ... .12-0.20, Si≤0.30, Mn0.30-0.70,S≤0.045 , P≤0.045,Cr≤0.30,Ni≤0 ... .30,Cu≤0.30Mechanical&Technalical :Y.S.(MPa)≥235 , T.S.(MPa) 375—500 , EL≥23%Size(mm)Length ...
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