What is difference between steel materials bs en s355j2 and s355jr ?

S355J2 and S355JR steel materials both comply to european steel specficiation BS EN 10025-2 hot rolled product for non-alloy structural steels.These two steel grades S355JR and S355J2 even owned the very similar chemical compositions and yield & tensile strength.The main difference is their application enviroments,steel materials S355J2 have to be done charp V notch impacting test at minus 20 deg.c,however S355JR no need.So S355J2 steel materials can be used in low temperature surroundings such as deep ocean platforms.

Steel materials S355J2 and S355JR both supplied as steel pips,steel angles,H shape beams,I shape beams,steel plates and coils,etc.Mill test certificates shall be issued comply to EN 10204 2.1,EN 10204 2.2,EN 10204 3.1 or EN 10204 3.2 with third party inspections.

 

Steel grades S355J2 vs S355JR		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
EN 10025-2	S355JR	0.24	1.60	0.035	0.035	0.55	0.012	0.55
Mechanical Properties:		Thickness		Yield strength		Tensile strength
				Mpa  Min.		Mpa
EN 10025-2	S355J2	T≤16		355		470-630
EN 10025-2	S355JR	T≤16		355		470-630