Q420GJE-Z35 building steel heat treatment and Z-direction performance requirements

Q420GJE-Z35 high rise building steel heat treatment:
The carbon equivalent of Q420GJE-Z35 material has different requirements under different heat treatment processes, but the yield tensile, impact, elongation and other performance requirements are the same. Heat treatment is to make the material achieve the desired performance through certain processes. The general heat treatment processes of Q420GJE-Z35 material include: hot rolling, normalizing, normalizing rolling, normalizing+tempering, TMCP.

Q420GJE-Z35 building steel flatness:
The flatness, thickness, dimension, shape and other allowable tolerance of Q420GJE-Z35 material shall comply with the GB/T 709 standard.

Q420GJE-Z35 high rise building steel thickness direction performance [Z-direction performance]:
High rise buildings have strict requirements on the Z-direction performance of materials, which should not only consider the performance of materials in the transverse and longitudinal directions, but also consider the performance in the thickness direction; Because high-rise buildings should not only bear their own loads and external loads, but also consider the role of earthquake resistance, so the requirements for materials are relatively high.