S355JR and S355J0 are both high-strength, low-alloy structural steels (EN 10025 standard) with a minimum yield strength of 355 MPa, but their key difference lies in their Charpy V-notch impact test temperature: S355JR requires 27 Joules at room temperature (+20°C), while S355J0 requires the same energy (27J) but at a colder temperature (0°C), making S355J0 better suited for colder applications needing improved toughness.
Chemical composition of the Product analysis of grade S355JR
|
C |
Si |
Mn |
Ni |
P |
S |
Cr |
Mo |
|
max 0.27 |
0.60 |
1.70 |
|
Max 0.045 |
Max 0.045 |
|
|
|
V |
Nb |
Ti |
N |
Cu |
|
|
|
|
|
|
|
|
0.60 |
|
|
|
Chemical composition of the Product analysis of grade S355J0
|
C |
Si |
Mn |
Ni |
P |
S |
Cr |
Mo |
|
max 0.24 |
0.60 |
1.70 |
|
Max 0.045 |
Max 0.045 |
|
|
|
V |
Nb |
Ti |
N |
Cu |
|
|
|
|
|
|
|
0.014 |
0.60 |
|
|
|
Mechanical properties of grade S355JR
|
|
-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) |
355 |
345 |
335 |
325 |
315 |
295 |
285 |
275 |
|
|
Nominal thickness (mm) |
-3 |
3-100 |
100-150 |
150-250 |
250-400 |
|
Rm -Tensile strength (MPa) |
510-680 |
470-630 |
450-600 |
450-600 |
|
|
Nominal thickness (mm) |
3-40 |
40-63 |
63-100 |
100-150 |
150-250 |
250-400 |
|
A - Minimum elongation Lo = 5,65 √ So (%) |
22 |
21 |
20 |
18 |
17 |
|
Mechanical properties of grade S355J0
|
|
-150 |
150-250 |
250-400 |
|
Minimum energy nominal thicknessTemperature(0) |
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) |
355 |
345 |
335 |
325 |
315 |
295 |
285 |
275 |
|
|
Nominal thickness (mm) |
-3 |
3-100 |
100-150 |
150-250 |
250-400 |
|
Rm -Tensile strength (MPa) |
510-680 |
470-630 |
450-600 |
450-600 |
|
|
Nominal thickness (mm) |
3-40 |
40-63 |
63-100 |
100-150 |
150-250 |
250-400 |
|
A - Minimum elongation Lo = 5,65 √ So (%) |
22 |
21 |
20 |
18 |
17 |
|
Similarities
"S": Structural steel.
"355": Minimum yield strength of 355 MPa (for thicknesses up to 16mm).
Strength: Excellent yield and tensile strength, commonly used where higher strength than S275 is needed.
Weldability: Good weldability and machinability, similar to mild steel.
Applications
S355JR: General structural applications, buildings, bridges, where moderate impact resistance at ambient temperatures is sufficient.
S355J0: Also used in structural work, including parking areas and pipe bridges, offering better performance in slightly cooler conditions than JR.
