S275N -- normalized fine-grain structural steel. Re>=275 MPa, improved toughness vs S275JR. For bridges, lifted structures and offshore where guaranteed impact energy at -20 C is needed.
S275N per EN 10025-3 (1.0490). Normalized fine-grain HSLA with Nb microalloying. Re>=275 MPa, Charpy -20 C guaranteed. One step above S275JR in toughness assurance.
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