EN10210
The EN10210 is a European standard prepared for structure steel. There are various grades that come under this standards like S235, S275, S355, S420 and S460. Out of these, the commonly used grade is EN10210 S355 Grade.
This part of this European standard specifies technical delivery conditions for hot finished hollow sections formed hot, with or without subsequent heat treatment, or formed cold with subsequent heat treatment to obtain equivalent metallurgical conditions to those obtained in the hot formed product.