S275NL and S460NL are weldable, fine-grain structural steels under European standard EN 10025-3, differing primarily in strength: S275NL has a minimum yield strength of 275 MPa, while S460NL is stronger, with a minimum yield of 460 MPa, making S460NL ideal for heavier loads and critical components like bridges, offshore structures, and cranes, both offering excellent low-temperature toughness (NL denotes normalising rolled with low-temperature impact testing).
Mechnical property for S275NL steel plate:
| Thickness (mm) | ||||||||
| S275NL | ≤ 16 | > 16 ≤ 40 | > 40 ≤ 63 | > 63 ≤ 80 | > 80 ≤ 100 | > 100 ≤ 150 | > 150 ≤ 200 | > 200 |
| Yield strength (≥Mpa) | 275 | 265 | 255 | 245 | 235 | 225 | 215 | 205 |
| ≤ 100 | > 100 ≤ 200 | > 200 | ||||||
| Tensile strength (Mpa) | 370-510 | 350-480 | 350-480 | |||||
Mechnical property for S460NL steel plate:
| Thickness (mm) | ||||||||
| S460NL | ≤ 16 | > 16 ≤ 40 | > 40 ≤ 63 | > 63 ≤ 80 | > 80 ≤ 100 | > 100 ≤ 150 | > 150 ≤ 200 | > 200 |
| Yield strength (≥Mpa) | 460 | 440 | 430 | 410 | 400 | 380 | 370 | 370 |
| ≤ 100 | > 100 ≤ 200 | > 200 | ||||||
| Tensile strength (Mpa) | 540-720 | 530-710 | 530-710 | |||||
Chemical composition for S275NL steel plate
| Main chemical elements composition of S275NL steel plate | ||||||
| C | Si | Mn | P | S | Nb | V |
| 0.16 | 0.40 | 0.50-1.50 | 0.025 | 0.020 | 0.05 | 0.05 |
| Al(total) | Ti | Cr | Ni | Mo | Cu | N |
| ≥0.02 | 0.05 | 0.30 | 0.30 | 0.10 | 0.55 | 0.015 |
Chemical composition for S460NL steel plate
| Main chemical elements composition of S460NL steel plate | ||||||
| C | Si | Mn | P | S | Nb | V |
| 0.20 | 0.60 | 1.00-1.70 | 0.025 | 0.020 | 0.05 | 0.20 |
| Al(total) | Ti | Cr | Ni | Mo | Cu | N |
| ≥0.02 | 0.05 | 0.30 | 0.80 | 0.10 | 0.55 | 0.025 |
S275NL
Yield Strength: Minimum 275 MPa (for thicknesses ≤ 16mm).
Tensile Strength: Around 370-510 MPa.
Application: Used in general welded structures requiring good weldability and toughness, but with lower strength demands than S460NL.
S460NL
Yield Strength: Minimum 460 MPa (for thicknesses ≤ 16mm).
Tensile Strength: Around 540-720 MPa.
Toughness: Excellent low-temperature toughness, often at -50°C.
Application: Heavy-duty, high-stress applications like bridges, offshore platforms, wind turbine towers, and heavy machinery.
Key Differences & Similarities
Strength: S460NL offers significantly higher strength (460 MPa yield) than S275NL (275 MPa yield).
Application: S460NL for heavy-duty; S275NL for lighter or general structural work.
Standard: Both fall under EN 10025-3, meaning they are weldable and fine-grained, supplied normalized (or normalized-rolled) for consistent properties.
"NL" Designation: Indicates normalized (N) and low-temperature impact tested (L), ensuring good performance in cold conditions.
