Products Description
S235J2 is a grade under the Europe standard 10025. In the brand of S235JR, S is the symbol for Structural Steel and J2 for -20 temperature impact test, and a minimum yield strength of 235 N/mm²which can be widely used in shipping building, engineer construction, mechanical manufacturing, the size of alloy steel sheet can be made according to clients' requirements.
Chemical Composition
The chemical composition of en 10025-2 s235j2 is tightly controlled to achieve optimal mechanical properties while maintaining weldability and formability. The table below outlines the typical composition per DIN EN 10025-2:
|
Element |
Composition (% by weight) |
|---|---|
|
Carbon (C) |
0.17 max |
|
Manganese (Mn) |
1.40 max |
|
Phosphorus (P) |
0.035 max |
|
Sulfur (S) |
0.035 max |
|
Silicon (Si) |
0.55 max |
|
Copper (Cu) |
0.55 max |
|
Nitrogen (N) |
0.012 max |
|
Iron (Fe) |
Balance |
Key Notes:
Carbon: Limited to 0.17% to ensure good weldability and prevent brittleness, critical for structural applications.
Manganese: Up to 1.40% enhances strength and toughness without compromising ductility.
Phosphorus and Sulfur: Low levels (0.035% max) improve impact resistance, especially at subzero temperatures (tested at -20°C for J2).
Silicon and Copper: Contribute to atmospheric corrosion resistance, making en 10025-2 s235j2 suitable for outdoor structures.
Gnee's en 10025-2 s235j2 plates undergo stringent chemical analysis to meet DIN EN 10025-2 requirements, with options for additional testing such as ultrasonic inspection.
Mechanical Properties
En 10025-2 s235j2 offers excellent mechanical properties, making it versatile for structural engineering. The table below summarizes its key properties per DIN EN 10025-2 (for plates up to 16 mm thickness):
|
Property |
Value |
|---|---|
|
Yield Strength (min) |
235 MPa |
|
Tensile Strength |
360–510 MPa |
|
Elongation (min, 200 mm) |
24% |
|
Impact Toughness (Charpy V-notch) |
27 J at -20°C |
|
Hardness (HB, typical) |
120–170 HB |
Highlights:
Yield Strength: Minimum 235 MPa ensures structural stability under light to moderate loads, ideal for general construction.
Tensile Strength: The 360–510 MPa range provides robustness for dynamic applications.
Elongation: 24% ductility supports forming and welding without cracking.
Impact Toughness: 27 J at -20°C ensures performance in cold climates, distinguishing it from EN 10025-2 S235JR (+20°C).
Compared to higher grades like EN 10025-2 S355JR (yield 355 MPa), en 10025-2 s235j2 offers cost-effective strength for less demanding applications.
Thickness Tolerance
Thickness tolerance for en 10025-2 s235j2 is governed by EN 10029, which specifies tolerances for hot-rolled plates 3 mm thick or above. For S235J2 (non-alloy structural steel with ReH ≥ 235 N/mm²), the default is Class A, unless otherwise specified. The table below summarizes EN 10029 Class A thickness tolerances:
|
Nominal Thickness t (mm) |
Tolerance (mm) Upper/Lower |
|---|---|
|
t ≤ 3 |
±0.3 |
|
3 < t ≤ 5 |
±0.4 |
|
5 < t ≤ 8 |
±0.5 |
|
8 < t ≤ 15 |
±0.6 |
|
15 < t ≤ 25 |
±0.8 |
|
25 < t ≤ 40 |
±1.0 |
|
40 < t ≤ 80 |
±1.2 |
|
80 < t ≤ 100 |
±1.4 |
|
100 < t ≤ 150 |
±1.8 |
|
150 < t ≤ 200 |
±2.2 |
|
200 < t ≤ 250 |
±2.6 |
Equivalent Material
|
Country/Standard |
Equivalent Grade |
Notes |
|---|---|---|
|
USA (ASTM) |
A283 Grade C |
Similar strength and weldability |
|
Germany (DIN) |
ST37-2N |
Comparable toughness at -20°C |
|
Japan (JIS) |
SS330 |
Equivalent for structural use |
|
China (GB) |
Q235D |
Matches yield strength and impact |
|
France (AFNOR) |
E24-3 |
Similar properties for construction |
|
ISO |
FE360D |
General structural equivalent |
|
UK (BS) |
40D |
Comparable for offshore applications |
Products Applications
En 10025-2 s235j2 is versatile and widely used in:
Construction: For bridges, buildings, and stadiums, where moderate strength and low-temperature toughness are required.
Offshore Engineering: In platforms and wind turbines, leveraging its corrosion resistance and impact toughness.
Heavy Machinery: For cranes, excavators, and mining equipment, where durability under dynamic loads is critical.
Shipbuilding: In hulls and superstructures, benefiting from its weldability and strength.
Energy Sector: For pipelines and storage tanks, similar to EN 10025 S355J2G3 material steel plates but with moderate strength.
Gnee's en 10025-2 s235j2 plates are available in thicknesses from 6–300 mm, with options for cut-to-size and cladding for specialized applications.
