| Grade | S355JR |
| European standard steel | 1.0045 |
| Standard | EN 10025-2-2004 |
| Hot rolled products of structural steels – Part 2:Technical delivery conditions for non-alloy structural steels | |
| Classification | Carbon steel |
| Performance | Non-alloy steel,Not allow rimmed steel. |
| S355JR Chemical Element Content (%) | ||||||||
| Constituent | C ① | Si | Mn | P ② | S ②③ | Cu ④ | N ⑤ | More |
| Min | – | – | – | – | – | – | – | ⑥ |
| Max | 0.24 | 0.55 | 1.6 | 0.035 | 0.035 | 0.55 | 0.012 | |
| ① Nominal thickness > 100mm, C content after negotiation. ② The P and S content of long products is 0.005% or higher. ③ For long products, if the form of sulfide in steel is changed, the maximum S content is increased by 0.015% in order to improve mechanical properties, and the chemical composition is the lowest value of 0.0020% Ca. ④ If the Cu content exceeds 0.40%, it can cause hot brittleness when hot setting. If the chemical composition is a minimum of 0.020% of the total content of aluminum or a minimum of 0.015% of the aluminic acid solution or when other nitrogen binders are present, do not use the maximum nitrogen. In this case the nitrogen binder should be recorded in the inspection document. ⑥ If additional elements are added, they should be reflected in the verification file. |
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| S355JR Mechanical properties | |||
| Condition | Tensile Strength | Yield stress | Elongation |
| σb | σs | δ | |
| Mpa | Mpa | % | |
| t＜3 | 510~680 | ≥355 | – |
| 3≤t≤16 | 470~630 | ≥355 | ≥22 |
| 16＜t≤40 | 470~630 | ≥345 | ≥22 |
| 40＜t≤63 | 470~630 | ≥335 | ≥21 |
| 63＜t≤80 | 470~630 | ≥325 | ≥20 |
| 80＜t≤100 | 470~630 | ≥315 | ≥20 |
| 100＜t≤150 | 450~600 | ≥295 | ≥18 |
| 150＜t≤200 | 450~600 | ≥285 | ≥17 |
| 200＜t≤250 | 450~600 | ≥275 | ≥17 |
| ① When the nominal thickness t≤1, the elongation after fracture δ≥14 ② When the nominal thickness is 1 < t≤1.5, the elongation after fracture is δ≥15 ③ When the nominal thickness is 1.5 < t≤2, the elongation after fracture is δ≥16 ④ When the nominal thickness 2 < t≤2.5, the elongation after fracture δ≥17 ⑤ When the nominal thickness is 2.5 < t < 3, the elongation after fracture is δ≥18 |
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| Approximate comparison table-Carbon structural steel and engineering steel | |||||||||
| China | Japan | America | The International Standard Organization | Germany | France | European standard | Sweden | United Kingdom | |
| GB | JIS | ASTM | ISO | DIN EN/DIN | NF EN/NF | EN | Numerical grade | SS | BS EN/BS |
| Q345B | SM490A | A572 | E355C | St52-3 | E36-2 | S355JR | 1.0045 | Jan-32 | 50B |
| Q345C | SS490 | A678Gr.A | Fe510B | Fe510B | |||||
| SSGrade50 | |||||||||
