What are the S355JR steel chemical composition and eqivalent?

S355JR steel is a low-alloy high-strength structural steel that meets the European standard EN10025. S355JR steel in China is a low-alloy high-strength structural steel with a hardness of 70-80B and a yield strength of 300-400MPa.

S355JR chemical composition: C:≤0.22; Si:≤0.55; Mn:≤1.60; P:≤0.025; S:≤0.025
The equivalent grade of S355JR steel is Q345B
The equivalent grade of S355J0 steel is Q345C
The equivalent grade of S355J2 steel is Q345D
The equivalent grade of S355K2 steel is Q345E