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What is the difference between hot-rolled and cold-rolled steel?
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Short answer
Hot-rolled sheet is rolled at high temperature, leaving a dark mill-scale surface and wider tolerances; cold-rolled sheet is rolled again at room temperature, giving a smoother surface, tighter dimensions and usually thinner gauges. Choose hot-rolled for structural and general fabrication, and cold-rolled when surface quality and accuracy matter.
How each is made
In hot rolling, steel is heated above its recrystallisation temperature and passed through rolls to the required thickness. Cold-rolled sheet usually starts as hot-rolled sheet that is descaled and then rolled again at room temperature.
| Property | Hot-rolled | Cold-rolled |
|---|---|---|
| Surface | Dark mill scale | Smooth and clean |
| Dimensional tolerances | Wider | Tighter |
| Typical gauges | Thicker | Thinner |
| Typical use | Structural and general fabrication | Work needing surface quality and accuracy |
What to put in your quotation request
- Type: hot-rolled or cold-rolled
- Thickness, width and length in millimetres
- Supply form: sheets or coils
- Steel grade (e.g. S235 or St37) or required standard
- Required finish for cold-rolled, quantity and delivery location
FAQ
Is cold-rolled steel stronger?
Cold rolling can raise hardness and yield strength through work hardening, but actual properties depend on grade, standard and heat-treatment condition — check the mill certificate.
General guidance — not an offer or commitment by BUILDORA.