What is the difference between S235JR and S235JRG2 steel plate

What is the difference between S235JR and S235JRG2 steel plate?

S235JRG2 steel plate is regulated in EuroNorm EN 10025 superseded by EN 10025-2 (2006) and the new designation is just S235JR steel plate. Both editions deal with "structural" steels.

The numerical designation of S235JR and S235JRG2 steel is 1.0038.
The symbolic designation of S235JR and S235JRG2 steel plate means:
S- "Structural Grade"
235- minimum value of yield strength in MPa ( roughly 35 ksi) for thicknesses ut to 16 mm.
JR- Base steel (Charpy impact test not obligatory, optional only)
G2- Rimming steel not allowed.

S235JR steel chemical composition:

Grade	C (t≤16mm)	Si	Mn	P	S	Cu	N
S235JR	0.19 max	-	1.5 max	0.045 max	0.045 max	0.60 max	0.014 max

S235JR steel plate sheet mechanical properties:

Grade	Yield strength ReH/(N/mm2)	Tensile strength Rm/(N/mm2) (3mm≤t≤16mm)	Elongation A/%
Grade	(t≤16mm) min	Tensile strength Rm/(N/mm2) (3mm≤t≤16mm)	(3mm≤t≤40mm) min
S235JR	235	360-510	26

As structural steel, S235JR and S235JRG2 steel plate are mainly used in riveted, bolted, or welded construction of bridges and buildings.

S235 series carbon structural steel also includes S235J0 steel, S235J2 steel, etc.

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