S355J0 and S355J2 are structural steels under the EN 10025 standard, sharing a minimum yield strength of 355 MPa, but their key difference lies in the Charpy impact test temperature: S355J0 requires 27 Joules at 0°C, while S355J2 requires 27 Joules at a colder -20°C, making S355J2 better for low-temperature applications, with slightly lower phosphorus/sulfur content and potentially better fatigue life.
S: Structural steel.
355: Minimum yield strength of 355 MPa.
J: Denotes a Charpy V-notch impact test.
0 / 2: The temperature (in °C) at which the impact test is performed (0°C for J0, -20°C for J2).
S355J0 steel plate:
| S355J0 | ≤ 16 | > 16 ≤ 40 | > 40 ≤ 63 | > 63 ≤ 80 | > 80 ≤ 100 | > 100 ≤ 150 | > 150 ≤ 200 | > 200 ≤ 250 | > 250 |
| 355 | 345 | 335 | 325 | 315 | 295 | 285 | 275 | 275 | |
| < 3 | ≥ 3 ≤ 100 | > 100 ≤ 150 | > 150 ≤ 250 | > 250 | |||||
| 510-680 | 470-630 | 450-600 | 450-600 | 450-600 | |||||
S355J2 steel plate:
-150 | 150-250 | 250-400 | |
Temperature(-20) | 27 | 27 | 27 |
to 16 | 16 - 40 | 40 - 63 | 63 - 80 | 80 - 100 | 100 - 150 | 150 - 200 | 200-250 | 250-400 | |
ReH - Minimum yield strength (MPa) | 355 | 345 | 335 | 325 | 315 | 295 | 285 | 275 | 265 |
-3 | 3-100 | 100-150 | 150-250 | 250-400 | |
Rm -Tensile strength (MPa) | 510-680 | 470-630 | 450-600 | 450-600 | 450-600 |
3-40 | 40-63 | 63-100 | 100-150 | 150-250 | 250-400 | |
A - Minimum elongation Lo=5,65 √ So (%) | 22 | 21 | 20 | 18 | 17 | 17 |
S355J0 steel plate
| Main chemical elements composition of S355J0 steel plate | |||||||
| C | P | S | N | ||||
| T≤16 | 0.20 | 0.55 | 1.60 | 0.030 | 0.030 | 0.012 | 0.55 |
| 16<> | 0.20 | ||||||
| 40<> | 0.22 | ||||||
S355J2 steel plate
| Main chemical elements composition of S355J2 steel plate | |||||||
| C | P | S | N | ||||
| T≤16 | 0.22 | 0.60 | 1.70 | 0.035 | 0.035 | 0.012 | 0.60 |
| 16<> | 0.22 | ||||||
| 40<> | 0.24 | ||||||
S355J0: Tested at 0°C (32°F).
S355J2: Tested at -20°C (-4°F).
Toughness: S355J2 offers superior toughness at lower temperatures, making it suitable for colder environments.
Chemical Composition (S355J2 vs. S355J0): S355J2 generally has lower maximum limits for Phosphorus (P) and Sulfur (S) (0.025% vs 0.030%), and no nitrogen (N) limit, which contributes to its enhanced cold performance.
