What is mild steel S235JR
What is mild steel S235JR
S235JR steel is a mild steel, and its carbon composition is below 0.2 percent. Mild steel S235JR has very good welding performance. The minimum yield strength of mild steel S235JR shall be 235 Mpa for nominal thickness, and tensile strength of mild steel S235JR shall be within 360-510Mpa.
The chemical composition of mild steel S235JR:
Maximum percentage of Carbon (C) is 0.20 percent.
Maximum percentage of Manganese (Mn) is 1.4 percent.
Maximum percentage of Silicon (Si) is 0.05 percent.
Maximum percentage of Phosphorous (P) is 0.035 percent.
Maximum percentage of Sulphur (S) is 0.035 percent.
Remaining is iron (Fe) percentage and with few negligible impurities.
Mechanical properties of mild steel S235JR:
| Grade | Thickness (mm) | Min Yield (Mpa) | Tensile (Mpa) | Elongation (%) | Min Impact Energy | |
| S235JR | 8mm-100mm | 215Mpa-235Mpa | 360-510Mpa | 24-26% | 20 | 27J |
| 101mm-200mm | 185-195Mpa | 350-490Mpa | 22% | 20 | 27J | |
| 201mm-400mm | - | - | 21% | 20 | 27J | |
| The min impact energy is longitudinal energy | ||||||
Mild steel S235JR is an unalloyed low carbon mild steel grade supplied as hot rolled. Mild steel S235JR provides low strength with good machinability and is suitable for welding. Mild steel S235JR is mainly used to produce structural parts of the bolted and welded steel in dustrial area.