S355J0W and S235J0W are European standard (EN 10025-5) weathering (Corten) steels, both offering atmospheric corrosion resistance, but differ in strength, with S355J0W having a higher minimum yield strength (355 MPa) than S235J0W (235 MPa), making S355J0W suitable for heavier structural loads, while S235J0W is for lighter applications, both forming protective rust layers for durability.
S: Indicates Structural Steel.
235 / 355: The minimum guaranteed yield strength in megapascals (MPa) for thinner sections (e.g., up to 16mm).
J0: Specifies a 0°C minimum Charpy impact test energy level.
W: Denotes Weathering Steel, meaning it develops a stable, protective rust patina over time, reducing need for painting.
Chemical composition of the Product analysis of grade S235J0W
|
C |
Si |
Mn |
Cu |
P |
S |
Cr |
N |
|
0.16 |
0.45 |
0.15-0.70 |
0.20-0.60 |
0.040 |
0.040 |
0.35-0.85 |
0.010 |
Chemical composition of the Product analysis of grade S355J0W
|
C |
Si |
Mn |
Cu |
P |
S |
Cr |
N |
|
0.19 |
0.55 |
0.45-1.60 |
0.20-0.60 |
0.040 |
0.040 |
0.35-0.85 |
0.010 |
Mechanical properties of grade S235J0W
|
Temperature |
-20 |
-10 |
0 |
20 |
|
Notch impact test. Min. absorbed energy J |
27 |
|
Nominal thickness (mm) |
to 16 |
16 - 40 |
40 - 63 |
63 - 80 |
80 - 100 |
100 - 150 |
|
ReH - Minimum yield strength (MPa) |
235 |
225 |
215 |
215 |
215 |
195 |
|
Nominal thickness (mm) |
to 3 |
3 - 100 |
100-150 |
|
Rm -Tensile strength (MPa) |
360-510 |
360-510 |
350-500 |
|
Nominal thickness (mm) |
≥1.5＜2 |
≥2﹤2.5 |
≥2.5＜3 |
≥3＜40 |
≥40﹤63 |
≥6﹤100 |
≥100﹤150 |
|
A - Minimum elongation Lo = 5,65 √ So (%) Longitudinal |
19 |
20 |
21 |
26 |
25 |
24 |
22 |
Mechanical properties of grade S355J0W
|
Temperature |
-20 |
-10 |
0 |
20 |
|
Notch impact test. Min. absorbed energy J |
|
|
27 |
|
|
Nominal thickness (mm) |
to 16 |
16 - 40 |
40 - 63 |
63 - 80 |
80 - 100 |
100 - 150 |
|
ReH - Minimum yield strength (MPa) |
355 |
345 |
335 |
325 |
315 |
295 |
|
Nominal thickness (mm) |
to 3 |
3 - 100 |
100-150 |
|
Rm -Tensile strength (MPa) |
510-680 |
470-630 |
450-600 |
|
Nominal thickness (mm) |
≥1.5＜2 |
≥2﹤2.5 |
≥2.5＜3 |
≥3＜40 |
≥40﹤63 |
≥6﹤100 |
≥100﹤150 |
|
A - Minimum elongation Lo = 5,65 √ So (%) Longitudinal |
16 |
17 |
18 |
22 |
21 |
20 |
18 |
S235J0W:
Strength: Minimum yield strength of 235 MPa.
Applications: Lighter structural components, decorative elements, architectural features where lower loads are involved.
S355J0W:
Strength: Minimum yield strength of 355 MPa (significantly stronger than S235J0W).
Applications: Heavy-duty structures, bridges, buildings, and other load-bearing applications needing enhanced strength and corrosion resistance.
In Essence: Choose S355J0W for strength and heavy loads, and S235J0W for lighter loads and decorative purposes, both offering excellent weather resistance.
