S355J0W weathering steel plate is a European standard atmospheric corrosion resistant steel and belongs to the category of weathering steel plate, also widely known as S355J0W corten steel.
S355J0W weathering steel plate
It is a low-alloy high-strength structural steel produced by adding small amounts of alloying elements such as Cu, Cr, Ni, and P to ordinary carbon structural steel.
Standard of S355J0W steel plate
S355J0W steel plate is manufactured according to the EN10025-5:2004 standard and is commonly supplied in hot rolled, normalized, or normalized rolled conditions.
The material has excellent weldability, cold forming properties, and machining performance, enabling it to meet the fabrication requirements of various engineering and construction projects.
Chemical Composition of S355J0W Steel Plate
| Grade | C Max | Si Max | Mn | P Max | S Max | Ni Max | Cr | Mo Max | Cu | N Max | Zr Max | Ceq Max |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| S355J0W | ≤0.16 | ≤0.50 | 0.50-1.50 | ≤0.030 | ≤0.025 | ≤0.65 | 0.40-0.80 | ≤0.30 | 0.25-0.55 | ≤0.010 | ≤0.15 | ≤0.52 |
For every 0.005 reduction in the maximum phosphorus (P) content, the maximum nitrogen (N) content may be increased by 0.001, up to a maximum of 0.012.
Mechanical Properties of S355J0W Steel Plate
| Product Form | Delivery Condition | Thickness | Yield Strength ReH (MPa) | Tensile Strength Rm (MPa) | Elongation A (%) | Impact Temperature | Impact Energy Akv (J) | Remarks |
|---|---|---|---|---|---|---|---|---|
| Plate | Hot Rolled / Normalized / Normalized Rolled | ≤16 mm | ≥355 | 470-630 | ≥20 | 0°C | ≥27 | Transverse tensile test sampling |
| Plate | Hot Rolled / Normalized / Normalized Rolled | >16-40 mm | ≥345 | 470-630 | ≥20 | 0°C | ≥27 | Transverse tensile test sampling |
| Plate | Hot Rolled / Normalized / Normalized Rolled | >40-63 mm | ≥335 | 470-630 | ≥19 | 0°C | ≥27 |
Application of S355J0W steel plate
S355J0W weathering steel plate is widely used in the manufacturing of oil drilling rigs, offshore platforms, petroleum storage structures, and related heavy-duty steel components exposed to harsh atmospheric environments.
Oil drilling equipment often operates in coastal areas, deserts, offshore platforms, and other environments with high humidity, salt spray, strong winds, and significant temperature differences.
Under these severe conditions, ordinary carbon steel is prone to rapid corrosion, leading to increased maintenance costs and reduced service life.
Due to its excellent atmospheric corrosion resistance, S355J0W corten steel can form a dense protective rust layer on the surface during long-term outdoor exposure.
This protective oxide layer effectively slows down further corrosion, improving the durability and reliability of steel structures used in petroleum engineering projects.
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Can S355 be hardened?
S355 is not ideally suited to hardening, though it can be subjected to limited heat treatment process such as case hardening. When hardening S355 heat treatment temperatures, including rate of heating, cooling and soaking times will vary due to factors such as the shape and size of each component.
What is the American equivalent of S355J0?
ASTM A572 Grade 50: This is a common equivalent to S355J0 in terms of mechanical properties and usage in construction and structural applications. ASTM A36: While A36 has lower mechanical properties than S355J0, it can sometimes be used as an equivalent in less demanding applications.
What grade of steel is S355J0?
S355J0 is a non-alloy structural steel grade defined by the EN 10025-2 standard. The "S" denotes "structural," indicating its use in constructing buildings, machinery, or infrastructure.
Can S355 be welded?
S355 structural steel, widely used in offshore, shipbuild- ing, and construction industries, is known for its excellent weld- ability and durability, as well as for its corrosion and fatigue characteristics.
