bs355jr s355j0 dbifference

What is the difference between S355JR and S355J2 steel

In S355JR and S355J2 steel, JR and J2 indicates the steel needs to do +20 impact test and -20 impact test respectively. The different impact temperature is the main difference between S355JR and S355J2 steel. S355J2 steel can better adapt to low temperature work condition than S355JR steel.