Hello, I want to ask, today we have entered a batch of steel bars. The mark on the steel bar is 4E (Yanshan brand trademark) 14. But there is no letter indicating which manufacturer.
You can't tell which manufacturer it is just by looking at 4E. 4E 14 is the diameter of hot rolled ribbed HRB400e14 mm. E is the reinforcement that meets the mechanical performance requirements of structural reinforcement with seismic grade I, II and III in the seismic code. The requirements are' buckling ratio',' yield ratio' and' elongation' in the tensile test of steel bars. See GB 50011-2010 and revision of GB50204-2002 for details.
"The steel quality certificate given is Tang Gang's. Is it Tang Gang? " This is really unbelievable. Some steel mills are fooling around. I suggest calling the steel manufacturer.