S235JR and S235J0 are both non-alloy structural steels with similar strength, but their key difference is impact toughness, determined by the letter after 'J': JR means impact test at +20°C, while J0 means a tougher test at 0°C, making S235J0 better for colder conditions, with slightly tighter limits on phosphorus (P) and sulfur (S) for improved low-temp performance. Both offer good weldability and formability for general construction, but S235J0 costs slightly more due to its enhanced impact properties.
Chemical composition for S235JR steel plate
C | Si | Mn | Ni | P | S | Cr | Mo |
max 0.23 |
| 1.50 |
| Max 0.045 | Max 0.045 |
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V | Nb | Ti | N | Cu |
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|
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| 0.014 | 0.60 |
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Chemical composition for S235J0 steel plate
| Main chemical elements composition of S235J0 steel plate | |||||||
| Thickness(mm) | C | Si | Mn | P | S | N | Cu |
| T≤16 | 0.17 | ... | 1.40 | 0.030 | 0.030 | 0.012 | 0.55 |
| 16<T≤40 | 0.17 | ||||||
| 40<T | 0.17 | ||||||
Mechnical property for S235JR steel plate:
| -150 | 150-250 | 250-400 |
Minimum energy nominal thicknesstemperature(20) | 27 | 27 |
|
Nominal thickness (mm) | to 16 | 16 - 40 | 40 - 63 | 63 - 80 | 80 - 100 | 100 - 150 | 150 - 200 | 200-250 | 250-400 |
ReH - Minimum yield strength (MPa) | 235 | 225 | 215 | 215 | 215 | 195 | 185 | 175 | - |
Nominal thickness (mm) | -3 | 3-100 | 100-150 | 150-250 | 250-400 |
Rm -Tensile strength (MPa) | 360-510 | 360-510 | 350-500 | 340-490 | - |
Nominal thickness (mm) | 3-40 | 40-63 | 63-100 | 100-150 | 150-250 | 250-400 |
A - Minimum elongation Lo = 5,65 √ So (%) | 26 | 25 | 24 | 22 | 21 | - |
Mechnical property for S235J0 steel plate:
| Thickness (mm) | |||||||||
| S235J0 | ≤ 16 | > 16 ≤ 40 | > 40 ≤ 63 | > 63 ≤ 80 | > 80 ≤ 100 | > 100 ≤ 150 | > 150 ≤ 200 | > 200 ≤ 250 | > 250 |
| Yield strength (≥Mpa) | 235 | 225 | 215 | 215 | 215 | 195 | 185 | 175 | 175 |
| < 3 | ≥ 3 ≤ 100 | > 100 ≤ 150 | > 150 ≤ 250 | > 250 | |||||
| Tensile strength (Mpa) | 360-510 | 360-510 | 350-500 | 340-490 | 340-490 | ||||
