Difference between S355NL and S355J0 steel plate

Jan 16, 2026 Ostavi poruku

S355NL and S355J0 are both European standard (EN 10025) high-strength structural steels with a minimum yield strength of 355 MPa, but they differ in delivery condition and toughness, making S355NL superior for cold climates: S355NL is fine-grain, normalized, and tested to -50℃ impact (>=27 J), ideal for arctic/offshore use, while S355J0 is typically hot-rolled (or normalized if specified as +N) with less stringent -20℃ toughness, suitable for general construction in milder environments.

S355J0 steel plate:


S355J0	<= 16	> 16 <= 40	> 40 <= 63	> 63 <= 80	> 80 <= 100	> 100 <= 150	> 150 <= 200	> 200 <= 250	> 250
	355	345	335	325	315	295	285	275	275
	< 3	>= 3 <= 100				> 100 <= 150	> 150 <= 250		> 250
	510-680	470-630				450-600	450-600		450-600

S355NL steel plate:


S355NL	8mm-100mm	235Map-275Mpa	470-630Mpa	22%	-50	27J
	101mm-200mm	285Mpa-315Mpa	450-600Mpa	21%	-50	27J
	201mm-250mm	275Mpa-285Mpa	450-600Mpa	21%	-50	27J

S355J0 steel plate

Main chemical elements composition of S355J0 steel plate
	C			P	S	N
T<=16	0.20	0.55	1.60	0.030	0.030	0.012	0.55
16<>	0.20
40<>	0.22

S355NL steel plate

	C %			P %	S %	V %
S355NL	0.180	0.500	0.9-1.65	0.025	0.020	0.120	0.020	0.300
						N %
	0.550	0.100	0.050	0.300	0.050	0.015

S355NL (Normalized)

Condition: Fine-grain, supplied normalized (or normalized rolled) for better toughness.

Toughness: High, guaranteed >=27 Joules at -50℃, excellent for very cold conditions.

Weldability: Better due to lower Carbon Equivalent (CEV), requiring less preheat.

Applications: Offshore platforms, wind towers, cold-climate bridges, heavy-duty welded structures.

S355J0 (Hot-Rolled/Normalized)

Condition: Hot-rolled (if just J0) or normalized (if J0+N).

Toughness: Good, but typically guaranteed >=27 Joules at 0℃ (if J0) or -20℃ (if J0+N), suitable for temperate zones.

Weldability: Good, but slightly higher CEV than NL.

Applications: General structural frameworks, bridges, machinery in moderate climates.