Steel equivalents / Common structural steel (S235 / A36 / SS400)

S275JR

EUApproximate match

CEN · EN 10025-2:2019

Family of unalloyed carbon structural steels used in steel framing, locksmithing/metalwork and light boilermaking for applications without high-strength requirements. It's the most common and cheapest grade on the market, available in nearly every region of the world under closely related designations.

Equivalents by yield strength proximity

Grade	Region	Standard	Re (MPa)	Rm (MPa)	Delta
S275JR	EU	EN 10025-2:2019	275	410–560	reference
A36	US	ASTM A36/A36M	250	400–550	-9%
Neighboring grades — different strength
SM400A	JP	JIS G3106:2020	245	400–510	-11%
SS400	JP	JIS G3101:2020	245	400–510	-11%
SS400	KR	KS D3503:2018	245	400–510	-11%
S235JR	EU	EN 10025-2:2019	235	360–510	-15%
E235 (ex-Fe360)	ISO	ISO 630-2:2021 (ancien ISO 630:1995, désignation historique Fe360)	235	360–510	-15%
S355JR	EU	EN 10025-2:2019	355	470–630	+29%

Chemical composition (wt%)

Grade	C	Mn	Si	P	S	Cu	N
S275JR	≤0.21	≤1.5	≤0.05	≤0.04	≤0.045	—	—
A36	≤0.26	0.6–0.9	≤0.4	≤0.04	≤0.05	≥0.2	—
SM400A	≤0.23	—	—	≤0.035	≤0.035	—	—
SS400	≤0.25	≤1.4	—	≤0.04	≤0.04	—	—
SS400	—	—	—	≤0.05	≤0.05	—	—
S235JR	≤0.17	≤1.4	≤0.2	≤0.035	≤0.035	—	—
E235 (ex-Fe360)	—	—	—	—	—	—	—
S355JR	≤0.24	≤1.6	≤0.55	≤0.04	≤0.04	≤0.55	≤0.012

Note: Intermediate variant of the S235/S275/S355 family, thickness ≤16 mm. Yield strength drops to 265 MPa between 16-40 mm. Secondary sources give slightly different composition ranges depending on the manufacturer; values here were cross-checked between two independent sources.

Values compiled from public sources for guidance only — always verify against the official standard before use in design or fabrication.