ISO 5952:2019 specifies requirements for hot-rolled steel sheet of structural quality with improved atmospheric corrosion resistance, also known as weather-resistant structural steel. The standard covers steel intended for structures where mechanical properties and increased resistance to atmospheric corrosion are required. The current ISO 5952:2019 edition was reviewed and confirmed in 2024. Ladhani Metal Corporation is a manufacturer, supplier, and exporter of ISO 5952 Hot-Rolled Steel Sheet – Weathering Steel, available in required grades, classes, thicknesses, widths, lengths, coils, and cut-to-size sheets. Products can be supplied with mill test certificates and strict quality inspection as per international standards. Forms of Supply • Hot-Rolled Steel Sheets | Weathering Steel Sheets | Atmospheric Corrosion Resistant Sheets | Structural Steel Sheets | Hot-Rolled Coils | Cut-to-Length Sheets | Descaled Sheets | Pickled Sheets | Oiled Sheets | Custom Cut Sheets Available Grades HSA 235W | HSA 245W | HSA 355W1 | HSA 355W2 | HSA 365W Classes • Class A – Suitable for moderate loading conditions • Class B – Intended for welded structures and structural parts subjected to normal loading conditions • Class C – Intended where some resistance to brittle fracture is required • Class D – Intended where high resistance to brittle fracture is required ISO 5952:2019 identifies HSA 235W, HSA 245W, HSA 355W1, HSA 355W2 and HSA 365W, with the applicable classes specified in the standard. Chemical Composition – Example Grade HSA 355W1 • Carbon (C): Max. 0.12% • Manganese (Mn): Max. 1.00% • Silicon (Si): 0.20–0.75% • Phosphorus (P): Max. 0.035% • Sulfur (S): Max. 0.035% • Copper (Cu): 0.25–0.55% • Nickel (Ni): Max. 0.65% • Chromium (Cr): 0.30–1.25% The standard also permits microalloying elements such as vanadium, titanium and niobium, with the combined content of Mo, Nb, Ti, V and Zr limited to 0.15% where applicable. Mechanical Properties • HSA 235W: Yield strength min. 235 MPa | Tensile strength 360–510 MPa • HSA 245W: Yield strength min. 245 MPa | Tensile strength 400–540 MPa • HSA 355W1: Yield strength min. 355 MPa | Tensile strength 510–680 MPa • HSA 355W2: Yield strength min. 355 MPa | Tensile strength 510–680 MPa • HSA 365W: Yield strength min. 365 MPa | Tensile strength 490–610 MPa Elongation requirements vary according to grade, class, and sheet thickness. Dimensions and Thickness ISO 5952:2019 products are commonly supplied in thicknesses from 1.6 mm up to and including 12.5 mm and widths of 600 mm and over. They may be supplied in coils or cut lengths. Hot-rolled sheet below 600 mm wide may be slit from wider sheet and is still considered sheet. Surface Conditions • Hot-Rolled Surface • Descaled Surface • Pickled Surface • Oiled Surface • Unoiled Surface Hot-rolled material normally has oxide or scale from the rolling process. Scale can be removed by pickling or mechanical methods such as grit blasting. Descaled sheet may also be supplied with oil to help prevent rusting. Key Features • Improved atmospheric corrosion resistance • Weather-resistant steel characteristics • Good structural strength • Suitable for welded structures • Good weldability with appropriate welding conditions • High resistance to atmospheric exposure • Good dimensional consistency • Available in different strength levels • Suitable for bolted, riveted and welded structures • Available in coils and cut lengths Material Characteristics ISO 5952 weathering steel achieves improved atmospheric corrosion resistance through the intentional addition of alloying elements such as copper, chromium, nickel and phosphorus. These elements promote the formation of a protective oxide layer on the steel surface. The actual corrosion performance also depends on factors such as the surrounding atmosphere and structural design. Applications • Bridges • Structural Frameworks • Industrial Structures • Outdoor Structural Components • Railway Structures • Transportation Infrastructure • Buildings and Architectural Structures • Storage Structures • Welded Structural Components • Bolted Structures • Riveted Structures • General Engineering Structures ISO 5952 specifically identifies bolted, riveted and welded structures as intended uses for the covered weather-resistant structural steel sheets. Conclusion ISO 5952 Hot-Rolled Steel Sheet – Weathering Steel provides structural steel with improved atmospheric corrosion resistance along with specified mechanical properties. The grades HSA 235W, HSA 245W, HSA 355W1, HSA 355W2 and HSA 365W are available in different classes and dimensions to meet structural and engineering requirements. To place an order or make an enquiry for ISO 5952 Hot-Rolled Steel Sheet – Weathering Steel, contact Ladhani Metal Corporation for your required grade, class, thickness, width, length, surface condition and quantity.
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