What is equal to Bs en S355J2 low temperature steel materials ?

S355J2 steel materials come from european steel specficiation BS EN 10025-2,J2 means doing low temperaure impacting test at -20 Deg.C.Steel materials S355J2 can be made as S355J2 steel plates and sheets,S355J2 steel coils thickness normally belows 16mm,S355J2H steel pipes and tubes,S355J2H irregular shaped hollow sections square and rectangular,S355J2 steel profiles,angles,H beams.

Q345D steel materials in GB/T1591 chinese steel specification,in the latest specification GB/T 1591-2018,steel grade Q355D replace grade Q345D,comparing with S355J2 steel materials,Mechanical property and chemical composition near to the same,and Q345D steel also have to be done low impacting under -20Deg.C.So Q345D steel materials is equal to BS EN10025-2 S355J2 steel marerials.Also Q345C equivalent to S355J0,Q345B equivalent to S355JR steel materials.

Steel grades S355J2 vs Q345D		Chemical composition: Heat Analysis  Max%
Standard	Grade	C	Mn	P	S	Si	N	Cu
EN 10025-2	S355J2	0.20	1.60	0.025	0.025	0.55	0.012	0.55
GB/T 1591	Q345D	0.20	1.60	0.025	0.025	0.55	0.012	0.40
Mechanical Properties:		Thickness		Yield strength		Tensile strength
				Mpa  Min.		Mpa
EN 10025-2	S355J2	T≤16		355		470-630
GB/T 1591	Q345D	T≤16		355		470-630