Cold rolled steel coil (CRC) is one of the most widely traded flat steel products in global B2B markets, used in automotive parts, home appliances, furniture, metal doors, and as the base material for galvanized and color-coated coil. For importers sourcing from China, understanding which specifications are actually in stock and cost-efficient to produce makes the difference between a fast quotation and weeks of back-and-forth.
This article breaks down the cold rolled steel coil specifications that move the most volume in export trade, so buyers can request quotes with the right numbers from the start.
What Is Cold Rolled Steel Coil?
Cold rolled steel coil is produced by further rolling hot rolled steel coil at room temperature after pickling, which removes the surface oxide layer. The cold rolling process gives the steel a smoother, brighter surface finish, tighter thickness tolerance, and improved mechanical properties compared to hot rolled coil. It is typically supplied in full-hard, or annealed and skin-passed condition, depending on the forming application.
Because of its clean surface and formability, cold rolled coil is also the standard base metal for hot-dip galvanized coil (GI) and pre-painted coil (PPGI/PPGL).
Most Common Cold Rolled Steel Coil Grades
Buyers across different regions tend to reference different standards for the same underlying steel type. The table below lists the grades most frequently requested in export orders.
| Standard | Common Grades | Typical Application |
|---|---|---|
| China (GB/T 5213) | SPCC, SPCD, SPCE | General stamping, deep drawing |
| Japan (JIS G3141) | SPCC, SPCD, SPCE | Automotive, appliances |
| ASTM (USA) | CS Type A/B, DS, DDS | Structural, drawing quality |
| European (EN 10130) | DC01, DC03, DC04, DC05 | Cold forming, deep drawing |
| Structural | SPHC, Q195, Q235 (cold rolled) | Furniture, racking, general fabrication |
SPCC and DC01 are the two grades most commonly requested by African and Middle Eastern buyers for general-purpose fabrication, while DC03–DC05 and SPCD/SPCE are ordered for deeper drawing applications such as sink basins and automotive panels.
Common Thickness and Width Ranges
Most cold rolled coil mills run standard thickness bands, and ordering within these ranges keeps lead times shorter and prices more competitive.
| Specification | Common Range |
|---|---|
| Thickness | 0.3 mm – 3.0 mm (0.14 mm–0.3 mm available on request) |
| Width | 600 mm – 1,250 mm (1,500 mm on select mills) |
| Coil weight | 3–10 tons per coil |
| Inner diameter | 508 mm / 610 mm |
| Surface finish | Bright (B), Matte (D), Semi-bright |
| Temper | Full hard, 1/4 hard, 1/2 hard, soft/annealed |
For buyers unsure which thickness to specify, 0.5 mm, 0.8 mm, 1.0 mm, 1.5 mm, and 2.0 mm are the thicknesses most readily available across suppliers, since these correspond to standard rolling and slitting setups.
Cold Rolled Coil vs. Hot Rolled Coil
A quick comparison helps buyers new to steel sourcing choose the right base material:
| Property | Cold Rolled Coil | Hot Rolled Coil |
|---|---|---|
| Surface finish | Smooth, bright | Oxidized, rougher |
| Thickness tolerance | Tighter | Wider |
| Typical thickness | 0.3–3.0 mm | 1.2–20 mm |
| Price | Higher per ton | Lower per ton |
| Common use | Appliances, automotive, precision forming | Structural, pipe-making, construction |
Quality Certifications to Ask For
Reputable mills and exporters can provide the following for cold rolled steel coil shipments:
- Mill Test Certificate (MTC) per EN 10204 3.1
- ISO 9001 quality management certification
- SGS / BV / third-party inspection reports on request
- Chemical composition and mechanical property test reports (yield strength, tensile strength, elongation)
Buyers importing into markets with local standards bodies (such as SONCAP for Nigeria or KEBS for Kenya) should confirm in advance that the exporter has experience preparing the required certificates of conformity.
Frequently Asked Questions
What is the standard coil weight for cold rolled steel coil? Most export coils weigh between 3 and 10 tons, packed on standard inner diameters of 508 mm or 610 mm to fit common uncoiling equipment.
What is the difference between SPCC and DC01? SPCC is the Japanese/Chinese designation and DC01 is the European designation for a comparable commercial-quality cold rolled steel grade used in general forming and fabrication; they are broadly interchangeable for most non-critical applications.
Can cold rolled coil be slit to custom widths? Yes. Most mills can slit master coils down to custom widths, typically in the 20 mm–1,250 mm range, though minimum order quantities usually apply for non-standard widths.
Is cold rolled coil the same material used for galvanized coil? Cold rolled coil is the base substrate for hot-dip galvanized coil. The CRC is fed through a galvanizing line where it receives a zinc or zinc-aluminum coating, becoming GI or Galvalume coil.
What thickness tolerance can buyers expect? Standard cold rolled coil tolerances typically range from ±0.02 mm to ±0.05 mm depending on thickness and grade, tighter than the tolerances typical of hot rolled coil.