The buyer problem
Importers often receive two quote paths for low-carbon coil:
- 1020 (AISI / SAE low-carbon class)
- DC01 (EN 10130 commercial cold-forming quality)
Sales teams sometimes treat them as interchangeable. Process engineers usually do not—unless chemistry, hardness, surface, and forming severity are checked against the part.
Quick comparison
| Topic | 1020-class coil | DC01 (EN commercial CQ) |
|---|---|---|
| Naming system | AISI/SAE carbon steel class | EN cold-rolled forming designation |
| Typical use | General forming, blanking, light fabrication | Commercial quality cold forming / blanking |
| RFQ risk | “1020” without thickness/surface/hardness | “DC01” without surface, oiling, or drawing severity |
| Common companions | SPCC / commercial CR equivalents by agreement | DC03/DC04 when drawing is deeper |
| Documents | Heat/batch MTC EN 10204 3.1 as ordered | Same document path when export QA requires it |
Neither row is a free substitute for the other without process confirmation.
When an equivalent is reasonable
An equivalent path is often workable when:
- Forming is light (blanking, simple bends, non-critical surface).
- Chemistry and mechanicals fall inside the process window.
- The buyer states “or agreed commercial equivalent” in the PO.
- Surface, oiling, and hardness bands are written down—not assumed.
Deep drawing, exposed appliance panels, or tight flatness/surface specs need a tighter designation and sample approval.
RFQ fields that prevent wrong-grade offers
For either 1020 carbon steel coil or DC01 carbon steel coil, send:
- Thickness × width and tolerance
- Surface (oiled, chromated, dry) and hardness if critical
- Coil ID/OD or max coil weight
- Quantity and destination port
- End use / forming severity
- MTC and inspection requirements
Document and packing notes
Export lots typically move with seaworthy coil packing, edge protection, and heat/batch identity on labels. When QA requires it, coordinate EN 10204 3.1 MTC and optional third-party inspection before loading—not after the vessel sails.
Practical recommendation
- Spec already says DC01 / EN 10130 → quote DC01 path first.
- Spec says AISI 1020 / SAE J403 class → quote 1020 path first.
- Spec is loose commercial CR coil → state acceptable equivalents and forming severity, then align one offer line.
Next step
Use the product pages above or the RFQ form with grade, size, quantity, and port. For a general field checklist, read Steel RFQ checklist: grade, size, port, and MTC.
