Channel Steel
Material:
Q195,Q235,Q345,SS400,S235JR,S275JR,S355JR,304,201,Q235B,321,202,316,
HRB335,10#,q235,Q215,301,Q345B,20#, 316L,310S and so on
Size: (CHINA STANDARD) 5#-40#B;
      (JAPAN STANDARD)50*25*3-150*75*9; UPN; UPE80-200