0.0050N) is melted by a 500 kg vacuum induction furnace
cast to 210 mm slab and rolled to 25 mm and 40 mm plate
finishing temperature 790~830℃ water cooling. The structure of LY225 steel plate normalized heated at 880~900℃
air cooling is polygonal ferrite with grain size rating 7.5~8.5
yield strength 225~234 MPa
impact energy at 0℃ 285~294 J
and has better high- strain low-cycle fatigue property and weldability to meet the requirement of GB/T28905-2012 for mechanical properties of low yield point steel LY225 for anti-seismic building.