Cold rolled steel grades
What are the grades of cold roll steel?
Cold rolled steel grades represent a structured classification system that differentiates steels according to formability, mechanical performance, carbon content, and intended application. These grades help engineers, buyers, and manufacturers choose the correct cold rolled material for stamping, bending, deep drawing, and high-precision fabrication.
Cold rolled steel grades typically include classifications such as commercial quality, drawing quality, deep drawing quality, and ultra-deep drawing quality. By understanding these grades, companies can optimize material usage, improve product consistency, and enhance forming performance.
1. Classification of Cold Rolled Steel Grades
The EN 10130 standard widely used in global markets includes the following main grades:
Table 1. Cold Rolled Steel Grade Classification
| Category | Grades | Description |
|---|---|---|
| Commercial Quality | DC01 | General forming and bending |
| Drawing Quality | DC03 | Suitable for moderate drawing |
| Deep Drawing Quality | DC04, DC05 | Better ductility, low yield strength |
| Ultra-Deep Drawing | DC06, DC07 | Maximum elongation for complex shapes |
These categories help determine which grade is appropriate for applications ranging from simple bends to high-demand multi-stage forming.
2. Detailed Grade Comparison
Table 2. DC01–DC07 Grade Performance
| Grade | Formability | Yield Strength | Main Application |
|---|---|---|---|
| DC01 | ★★☆☆☆ | Medium | Cabinets, brackets, profiles |
| DC03 | ★★★☆☆ | Lower | Automotive parts requiring drawing |
| DC04 | ★★★★☆ | Low | Appliance housings |
| DC05 | ★★★★☆ | Very Low | Deep-draw components |
| DC06 | ★★★★★ | Ultra-Low | Fuel tanks, complex shapes |
| DC07 | ★★★★★ | Lowest | Precision multi-stage deep drawing |
The progression from DC01 to DC07 reflects increased ductility and reduced yield strength.
3. Global Equivalent Material Grades
Cold rolled steel has equivalent classifications in other major standards such as JIS in Japan, ASTM in the United States, and ISO internationally.
Table 3. Global Equivalents of Cold Rolled Steel Grades
| EN Grade | JIS Equivalent | ASTM Equivalent | Notes |
|---|---|---|---|
| DC01 | SPCC | A1008 CS | Commercial steel |
| DC03 | SPCD | A1008 DS | Drawing steel |
| DC04 | SPCE | A1008 DDS | Deep drawing steel |
| DC05 | SPCE-SD | A1008 EDDS | Extra deep drawing |
| DC06 | SPCF | A1008 EDDS+ | Extra-extra deep drawing |
| DC07 | SPCE-SD (closest) | EDDS | Ultra deep drawing |
This table helps engineers substitute materials when certain grades are unavailable in local markets.
4. Typical Applications of Cold Rolled Steel Grades
Commercial grades (DC01): electrical enclosures, tubing, hardware components
Drawing grades (DC03–DC04): appliance panels, automotive brackets
Deep drawing grades (DC05–DC06): inner body components, precision casings
Ultra-deep drawing grades (DC07): fuel systems, lighting housings, complex deep-drawn shells
The proper selection of grade improves forming efficiency, reduces cracking risk, and ensures stable production.
GNEE STEEL also produces other cold-rolled steel grades. If you have any needs for cold-rolled steel plates, cold-rolled steel coils, galvanized steel plates, or galvanized steel coils, please contact us.We will provide you with the latest quotation!
