What does "4E" mean on the rebar?
In addition, the extension rate of seismic reinforcement is not less than 9%, this figure is far higher than the standard of ordinary steel. And it is these technical indicators to enhance the strengthening of the seismic capacity of reinforced concrete, so that its tilt, deformation can be stabilized, not broken, reducing some casualties.
Hrb400e refers to three earthquake resistant steel bars. Compared with the ordinary reinforced phase, the biggest advantage is that the tensile strength and elongation are relatively large, for example, the tensile strength of common grade HRB400 three reinforcement requirements of more than 400 MPa; if hrb400e is aseismic reinforcement, the tensile strength is more than 550MPa.
The meaning of 4E on the rebar is HRB400 seismic reinforcement (HRB400e). 4 is HRB400 (formerly known as grade 3 steel), e is earthquake's e, meaning earthquake resistance. The steel bars marked with e have reached the standard of "anti-seismic" steel issued by the state.
