Development of 160 MPa Low Yield Point Steel Plate Used For Earthquake Resistant

The 160 MPa low-yield strength steel plate with 40 mm and 80 mm thicknesses for building aseismicity was developed through reasonable composition design and rolling technology.The LY160 steel could meet the requirements of GB/T28905—2012.The microstructure of the LY160 steel plate （40 mm） consists of ferrite andvery small amount of bainite.The grain sizes range from ASTM No.7 to 7.5.Yield strength is from 157 MPa to 168 MPa and tensile strength is from 291 MPa to 304 MPa.The impact energyat 0 ℃ ranges between 289 J and 311 J.The microstructure of the LY160 steel plate with 80 mm in thicknessis 100% ferrite.The grain sizes ranges from ASTM No.5 to 5.5.In addition,the yield strength is from 150 MPto 163 MPa,The tensile strength is from 280 MPa to 285 MPa.The impact energy at 0 ℃ ranges between 73 J and 92 J.The new developed LY 160 steel plate combines high low-cycle fatigue property and excellent weldability.