Difference between S235JR and S235J2 steel plate

Jan 07, 2026 Leave a message

S235JR and S235J2 are both non-alloy structural steels with a minimum yield strength of 235 MPa, but they differ in their impact toughness requirements, with S235J2 (material number 1.0117) offering better low-temperature performance than S235JR (1.0038), reflected in its lower phosphorus (P) and sulfur (S) content, while S235JR specifies a maximum Nitrogen (N) content, making J2 generally superior for colder applications despite similar mechanical properties.

Chemical composition of the Product analysis of grade S235JR

C	Si	Mn	Ni	P	S	Cr	Mo
max 0.23		1.50		Max 0.035	Max 0.035
V	Nb	Ti	N	Cu
			0.012	0.60

Chemical composition of the Product analysis of grade S235J2

Grade	Chemical composition % MAX
	THICKNESS(MM)	C	Mn	Si	P	S	N	Cu
S235J2	≦40	0.17	1.4	~	0.025	0.025	~	0.55

Mechanical properties of grade S235JR

	-150	150-250	250-400
Minimum energy nominal thicknesstemperature(20)	27	27

Nominal thickness (mm)	to 16	16 - 40	40 - 63	63 - 80	80 - 100	100 - 150	150 - 200	200-250	250-400
ReH - Minimum yield strength (MPa)	235	225	215	215	215	195	185	175	-

Nominal thickness (mm)	-3	3-100	100-150	150-250	250-400
Rm -Tensile strength (MPa)	360-510	360-510	350-500	340-490	-

Nominal thickness (mm)	3-40	40-63	63-100	100-150	150-250	250-400
A - Minimum elongation Lo = 5,65 √ So (%)	26	25	24	22	21	-

Mechanical properties of grade S235JR

Mechanical properties MIN
S235JR	Yield Strength MPa	Tensile Strength MPa	Elongation in 2 in. %
≦16	235	360-510	15
>16, ≦100	225
>100	165	330-510

Key Differences

Impact Testing Temperature: The letter suffix indicates the energy absorption test temperature:

JR: Room temperature (20°C).

J2: Lower temperature (typically -20°C).

Chemical Composition: S235J2 has stricter limits for impurities, enhancing toughness.

S235JR: Max P (0.035%), S (0.035%), N (0.012%).

S235J2: Max P (0.025%), S (0.025%), N (no spec).

Mechanical Properties: Yield strength (235 MPa min) and tensile strength (360-510 MPa for typical thickness) are often the same, but elongation may vary slightly, with J2 often having a slightly lower minimum elongation.