Overview
ISO 10384:2012 specifies requirements for hot‑rolled carbon steel sheet defined by chemical composition. It covers material grades (S08C through S58C), typical product forms (coils and cut lengths), nominal thickness ranges, chemical analysis and reporting, surface condition, descaling/oiling options, marking and inspection. The sheet is generally supplied for further heat treatment and customer forming (hot or cold) and is commonly used for machinery parts such as sprocket wheels, chain links, washers, knife blades and agricultural implements.
Key topics and technical requirements
- Chemical composition and grades: Defines heat‑analysis composition limits for grades S08C to S58C and limits on additional elements (Cu, Ni, Cr, Mo, Nb, V, Ti). The sum limits and reporting rules are specified in tables.
- Heat and product analysis: Manufacturer performs a heat analysis for each heat; purchasers may request product analysis. Sampling follows ISO 14284 and permissible deviations between heat and product analysis are provided.
- Dimensions and forms: Typical thickness range is about 0.8 mm to 12.5 mm; widths normally ≥ 600 mm (narrower widths may be slit from wide sheet). Dimensional and shape tolerances are referenced to ISO 16160.
- Surface condition and descaling: Hot‑rolled sheet carries oxide/scale. Descaling by pickling or mechanical means (grit/shot blasting) is addressed - purchaser should specify method because mechanical descaling can affect hardness/ductility.
- Oiling and rust protection: Descaled sheet is usually oiled to deter rust; the standard explains oiling is not a forming lubricant and that unoiled material can be supplied on request with limited supplier responsibility for oxidation.
- Tests available on request: Purchaser may request tests such as depth of decarburization (ISO 3887), non‑metallic inclusions (ISO 4967), grain size (ISO 643), hardness (ISO 6507‑1, ISO 6508‑1) and microstructure. Tensile properties are generally not specified because parts are heat treated after delivery.
- Marking and documentation: Minimum marking (manufacturer, ISO number, grade, order number, dimensions, lot and mass) and options for heat‑analysis and test reports are specified. Coil inside/outside diameter and mass limits should be agreed at order.
Applications and users
Who uses ISO 10384:2012:
- Steel producers and mills (for product specification and certification)
- OEMs and fabricators specifying raw material for stamped, formed or heat‑treated parts
- Procurement and quality engineers who require material traceability, heat analyses and acceptance testing
- Product designers and metallurgists selecting carbon steel grades for machinery, agricultural implements and abrasion‑resistant components
Related standards (normative references)
Keywords: ISO 10384:2012, hot‑rolled carbon steel sheet, chemical composition, S40C, heat analysis, product analysis, descaling, coil marking, ISO 16160.