... Hot roll Equal or Unequal angle bar---Usage(1).electric steel tower ,communication steel tower (2). All kinds of machines (3 ... , GB/T14292-1993,GB/T1979-2006(5)Low alloy structure steel fit for : Standard GB/T706-2008 ,GB/T9787-1988, GB ... , Si≤0.30, Mn0.30-0.70,S≤0.045 , P≤0.045,Cr≤0.30,Ni≤0.30,Cu≤0 ... , Si≤0.55, Mn1.00-1.60,S≤0.040 , P≤0.040 V≤0.02-0.015,Nb 0.015 ...