S275N and S275NL steel plate

Dec 12, 2025 Ħalli messaġġ

S275N and S275NL are normalized fine-grain structural steels designed for welded constructions, offering excellent weldability and strength.

However, S275NL provides enhanced low-temperature toughness compared to S275N, making it suitable for harsher environments.

S275N and S275NL are low-alloy, fine-grain structural steels under EN 10025-3 (designations 1.0490 and 1.0491, respectively). The "S" indicates structural steel, "275" denotes a minimum yield strength of 275 MPa, "N" means normalized delivery, and the "L" in S275NL signifies extended low-temperature impact testing.

While they share identical yield and tensile strength requirements, the key distinction lies in Charpy V-notch impact energy testing: S275N at -20℃ versus S275NL at -50℃. This makes S275NL ideal for arctic or sub-zero applications, whereas S275N suffices for moderate climates. Compared to higher grades like en 10025 3 s355n normalized structural steel plate, both offer cost-effective options for weldable structures.

	S275N Min (%)	S275N Max (%)	S275NL Min (%)	S275NL Max (%)
C	-	0.18	-	0.16
	-	0.40	-	0.40
	0.50	1.50	0.50	1.50
	-	0.30	-	0.30
P	-	0.030	-	0.025
S	-	0.025	-	0.020
	-	0.30	-	0.30
	-	0.10	-	0.10
V	-	0.05	-	0.05
N	-	0.015	-	0.015
	-	0.05	-	0.05
	-	0.05	-	0.05
	0.02	-	0.02	-
	-	0.55	-	0.55
-	-	0.40	-	0.40

	Yield Strength ReH Min (MPa) - Both	Tensile Strength Rm (MPa) - Both	Elongation A Min (%) - Both	Charpy KV Longitudinal Min (J) S275N at -20℃	Charpy KV Longitudinal Min (J) S275NL at -50℃	Charpy KV Transverse Min (J) S275N at -20℃	Charpy KV Transverse Min (J) S275NL at -50℃
<= 16	275	370–510	24	47	27	31	16
16 < t <= 40	265	370–510	24	47	27	31	16
40 < t <= 63	255	370–510	24	47	27	31	16
63 < t <= 80	245	370–510	23	47	27	31	16
80 < t <= 100	235	370–510	23	47	27	31	16
100 < t <= 150	225	350–480	23	47	27	31	16
150 < t <= 200	215	350–480	23	47	27	31	16
200 < t <= 250	205	350–480	23	47	27	31	16

S275N: Suitable for general welded structures in temperate climates, such as buildings, machinery frames, and bridges in mild weather. Cost-effective for non-extreme low-temp exposure.

S275NL: Preferred for harsh, cold environments like offshore platforms, arctic infrastructure, cranes in northern regions, and pressure vessels where fracture risk at -50℃ must be minimized.

For projects needing higher strength, consider en 10025 3 s275nl normalized structural steel plate or en 10025 3 s275n normalized structural steel plate.