Q355B steel plate is low alloy steel plate with yield strength of 355Mpa and impact temperature at room temperature.A in Q355A stands for no impact, and D in Q355D stands for -20 degree impact.The quality grade of Q355B steel plate is higher than that of Q355A, but lower than that of Q355D. If you need to use instead, Q355B can replace Q355A. but can not replace Q355D steel plate.
