Overview - ISO 5952:2019 (Hot‑rolled weather‑resistant structural steel)
ISO 5952:2019 specifies requirements for hot‑rolled steel sheet of structural quality with improved atmospheric corrosion resistance (commonly called weather‑resistant structural steel). The standard covers product form, required mechanical properties, chemical composition, testing, inspection, marking and purchaser information for sheets and coils produced in the grades and classes listed in the standard. The product is intended for applications requiring mechanical performance plus increased resistance to atmospheric corrosion and is generally supplied in the delivered condition for bolted, riveted or welded structures.
Key topics and technical requirements
- Scope & product form: Hot‑rolled sheet typically 1.6 mm to 12.5 mm thickness and widths ≥ 600 mm (coils and cut lengths); narrower sheets may be slit from wide sheet.
- Chemical composition: Heat analysis requirements (grades/classes given in Table 1) and limits on alloying elements used to achieve improved atmospheric corrosion resistance.
- Chemical testing: Manufacturer heat analysis required; purchaser product analysis allowed with specified tolerances (see Table 2).
- Mechanical properties & testing: Mechanical properties required at delivery; tensile testing procedures follow referenced methods (e.g., ISO 6892‑1). Sampling, retests and resubmission rules are specified.
- Corrosion resistance: Defined as improvement produced by controlled alloying (P, Cu, Cr, Ni, etc.) to promote a protective oxide layer; performance depends on environment and design (guidance in Annex A and B).
- Weldability & workmanship: Guidance on welding suitability and surface condition (scale/oxide, descaling effects). Oiling practices, dimensional and shape tolerances, coil size, marking and inspection/acceptance rules are included.
- Documentation: Requirements for marking and purchaser information to ensure traceability and correct application.
Applications and practical value
ISO 5952:2019 is used where structural components require both strength and increased resistance to atmospheric corrosion - for example, outdoor structural steel elements and general structural fabrications exposed to the environment. The standard helps:
- Ensure consistent material quality and weather‑resistant structural steel performance.
- Facilitate procurement, inspection and acceptance between manufacturers and purchasers.
- Support design and fabrication practices (welding, bolting, riveting) with traceable test and composition data.
Who uses this standard
- Steel producers and mills manufacturing hot‑rolled weather‑resistant sheet
- Structural fabricators and welders
- Purchasing/specification engineers and procurement teams
- Quality/inspection personnel and testing laboratories
- Designers and structural engineers specifying durable steel for atmospheric exposure
Related standards
Referenced and related standards include ISO 148‑1, ISO 6892‑1, ISO 16160 and other ISO grades/quality documents (e.g., ISO 3573, ISO 630‑5, ISO 4995, ISO 4996, ISO 5951) for complementary requirements and testing methods.