Chemical properties of S355N high strength structural steel
S355N high strength plate follows the European standard EN 10025-3 and belongs to the category of low alloy high strength structural steel.
S355N high tensile steel plate can still maintain high impact toughness under low temperature conditions, and can also maintain good plasticity and toughness at high temperatures, and is not easy to crack and deform.
S355N high strength alloy steel has good machinability and can be processed by cutting, welding, bending and folding.
S355N high strength low alloy has the advantages of high strength, good toughness and processing performance, and is widely used in many fields, including: the manufacture of large ships; bridge construction, such as highway bridges, railway bridges, etc.; power station equipment, medium and high pressure boilers and high pressure vessels and other equipment fields.
Chemical composition % of steel S355N high tensile steel sheet
| C | Si | Mn | Ni | P | S | Cr | Mo | V | N | Nb | Ti | Al | Cu | CEV |
| max 0.2 | max 0.5 | 0.9 - 1.65 | max 0.5 | max 0.03 | max 0.025 | max 0.3 | max 0.1 | max 0.12 | max 0.015 | max 0.05 | max 0.05 | max 0.02 | max 0.55 | max 0.45 |
Mechanical properties of steel S355N high strength steel
| Nominal thickness (mm): | to 100 | 100 - 200 | 200 - 250 |
| Rm - Tensile strength (MPa) Flat and long products | 470-630 | 450-600 | 450-600 |
| Nominal thickness (mm): | to 16 | 16 - 40 | 40 - 63 | 63 - 80 | 80 - 100 | 100 - 150 | 150 - 200 | 200 - 250 |
| ReH - Minimum yield strength (MPa) | 355 | 345 | 335 | 325 | 315 | 295 | 285 | 275 |
| KV - Impact energy (J) longitud., (+N) | +20° 55 |
0° 47 |
-10° 43 |
-20° 40 |
| KV - Impact energy (J) transverse, (+N) | +20° 31 |
0° 27 |
-10° 24 |
-20° 20 |
| Nominal thickness (mm): | to 16 | 16 - 40 | 40 - 63 | 63 - 80 | 80 - 200 | 200 - 250 |
| A - Min. elongation Lo = 5,65 √ So (%) | 22 | 22 | 22 | 21 | 21 | 21 |
