Those marked with "E" must meet two requirements:
1. The ratio of the measured tensile strength to the measured yield strength must not be less than 1.25;
2. The ratio of the measured yield strength to the standard yield strength must not be greater than 1.30;

Production requirements: If compared with ordinary rebar, if it has an E it means it is an earthquake-resistant rebar that can meet all the performance indicators of ordinary rebar and also achieve an earthquake-resistant effect. Comparing its tensile strength to yield strength ratio, it cannot be less than 1.25. The maximum total elongation of the rebar cannot be less than 9%.

Different characteristics: without E, it is the ordinary type, but with E, it is the earthquake-resistant type. The essential difference is that the ductility of the rebar is more prominent, and it can have better deformation resistance and plasticity during earthquakes.

Different structure: Compared with ordinary rebar, this rebar with E has earthquake-resistant properties. Even if the house is hit by an earthquake shock wave, it will not collapse completely within a certain period of time, which can improve its earthquake resistance.

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