Overview
ISO 3573:2012 specifies requirements for hot-rolled carbon steel sheet of commercial and drawing qualities (HR1–HR4). It covers material dimensions, chemical composition, mechanical properties, manufacturing conditions (descaling, skin pass, oiling, edges), inspection and testing. The standard applies to hot-rolled steel sheet produced in coils or cut lengths and is intended for applications where surface oxide/scale or normal surface imperfections are acceptable - it is not for uses where the surface finish is critical.
Key topics and technical requirements
- Scope and product form: Hot-rolled sheet typically 0.8 mm to 12.5 mm thick and in widths of 600 mm and over; narrow sheets slit from wide coils are included.
- Chemical composition: Maximum limits for C, Mn, P, S for qualities HR1–HR4 are defined; limits on Cu, Ni, Cr, Mo, Nb, V, Ti and overall sum constraints are given. Product analysis tolerances are specified.
- Mechanical properties: Tensile strength and minimum elongation requirements are provided for HR1 (commercial) through HR4 (deep drawing, aluminium-killed). Test methods follow ISO 6892-1.
- Manufacturing conditions:
- Descaling (pickling or mechanical): purchaser should specify; mechanical descaling can increase hardness and reduce ductility.
- Skin pass: optional light cold-rolling to improve surface smoothness, control flatness and reduce stretcher strain.
- Edges: mill edge or sheared edge supplied as ordered.
- Oiling: rust-preventative oil normally applied to descaled sheet; purchaser may request none.
- Weldability and fabrication: normally suitable for welding with appropriate procedures; drawing qualities intended for severe forming/drawing.
- Dimensional and shape tolerances: Referenced to ISO 16160.
- Testing, sampling and acceptance:
- Tensile test sampling: one representative sample per lot (lot = ≤ 50 t of same designation/thickness/condition).
- Tensile tests per ISO 6892-1; retest and resubmission rules included.
- Purchaser information: The purchaser should state requirements for descaling, skin pass, edge condition, oiling and whether the sheet is to be produced to make an identified part.
Applications and users
- Typical applications: general fabrication, bending, moderate forming, drawing and deep drawing (depending on quality), welded assemblies where surface scale is acceptable.
- Primary users: steel producers, coil manufacturers, metal fabricators, automotive part makers, procurement specialists, quality engineers and standards/specification writers who need to specify hot-rolled carbon steel sheet for manufacturing and procurement.
Related standards
- ISO 16160 - Hot-rolled steel sheet products: dimensional and shape tolerances
- ISO 6892-1 - Metallic materials: tensile testing at room temperature
Keywords: ISO 3573, hot-rolled carbon steel sheet, commercial quality, drawing quality, chemical composition, mechanical properties, descaling, skin pass, ISO 16160, ISO 6892-1.
