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.
Send your coil requirements
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.
