What DC01 and SPCC Cold Rolled Strip Coil Is
DC01 is the basic grade of the EN 10130 cold rolled family, material number 1.0330, formerly designated St12 under DIN 1623 and FeP01 in the first edition of the standard. SPCC is its counterpart under JIS G3141, the commercial quality cold reduced carbon steel sheet and strip standard. Both are non-alloy low carbon steels with very low carbon content, supplied cold rolled, annealed and lightly skin-passed, and both are traded heavily as slit strip coil for presses, tube mills and roll forming lines.
Strip coil differs from full width coil only in how it is presented: a master coil is unwound and passed through a rotary slitter, and the resulting narrow coils are rewound under controlled tension. The metallurgy does not change, but the dimensional control, edge condition and packing do.
DC01, SPCC and the Other Commercial Grades
| Standard grade | Standard | Forming class | Typical strip use |
|---|---|---|---|
| DC01 (1.0330) | EN 10130 | Simple forming, bending, light drawing | Brackets, covers, general press work |
| SPCC | JIS G3141 | Commercial quality | Roll formed sections, simple blanks |
| SPCD | JIS G3141 | Drawing quality | Moderate drawn parts from strip |
| SPCE | JIS G3141 | Deep drawing quality | Deeper drawn parts from strip |
Typical mechanical values for DC01 are a yield strength of 140-280 MPa, a tensile strength of 270-410 MPa and an elongation A80 minimum of 28%. SPCC sits in the same commercial quality band, and either grade can be slit to width once the drawing names the standard, the temper and the edge condition required.
Slitting Service: Width, Edge and Burr Control
Width range: master coils up to about 1500 mm wide are slit down to narrow strip, with narrow widths commonly from 10 mm upward and tolerances agreed to the finished width.
Edge condition: mill edge is retained on the outer edges of the master coil, while slit edge is produced by the rotary knives and is supplied with a defined burr limit.
Burr control: knife clearance and overlap are set so that the burr height on the slit edge stays within the limit agreed for the part, which matters for stacked blanks and for parts with visible edges.
Camber and flatness: strip is checked for camber and flatness after slitting, because a strip that wanders in a progressive die will not run at speed.
Tension and rewinding: coils are rewound at controlled tension to a dense, even wrap that feeds smoothly and resists telescoping in transit.
Coil Parameters and Dimensional Tolerances
| Parameter | Typical range | Remark |
|---|---|---|
| Thickness | 0.35-3.0 mm | Tighter rolling tolerance available on request |
| Strip width | 10 mm up to 1500 mm | Set by slitting knives and agreed tolerance |
| Coil inner diameter | 508 mm or 610 mm | Matched to the customer decoiler |
| Coil weight | 3-10 t | Set by line capacity and handling limits |
| Delivery condition | Annealed and skin-passed, full hard, black annealed | Chosen against the forming duty |
Dimensional tolerances for cold rolled uncoated flat products follow EN 10131, the same substrate with an electrolytic zinc coating is covered by EN 10152, and ISO 3574 covers commercial and drawing qualities for international work. Where an order is placed to JIS G3141, SPCC thickness and width tolerances are applied instead of the EN values, so the standard named on the drawing must travel with the order.
Why Buyers Take Strip Instead of Sheet
The press or tube mill can run a coil continuously, which raises output and reduces handling.
Narrow strip removes an in house slitting step and the scrap that goes with it.
A single master coil can be split into several widths, so one heat of DC01 or SPCC serves several different parts.
Strip is supplied oiled and edge controlled, so it feeds a progressive die without additional preparation.
Handling and Storage Notes
Cold rolled strip is delivered oiled to limit surface rust during transport and storage. Coils should be stored indoors on dry ground, kept clear of condensation cycles, and stacked so that the coil eye stays clear for the decoiler mandrel. Lifting should use a coil hook or C hook with protective pads so the outer wrap is not marked, since a marked outer wrap is often the first layer scrapped when the coil reaches the press.
Frequently Asked Questions
Q: Is DC01 the same as CR4?
Cold reduced steel is the term behind the CR4 trade shorthand, and the two are used for the same commercial forming quality. DC01 to EN 10130, material number 1.0330, is the current designation for that material and is supplied as coil, strip or sheet.
Q: What is DC01 steel equivalent to?
DC01 steel, material number 1.0330, is a European standard cold rolled quality low carbon flat product for cold forming. DIN 1623 has been replaced by EN 10130, and the earlier designation St12 has been replaced by DC01. In JIS G3141 terms the nearest commercial quality grade is SPCC.
Q: What is SPCC material?
SPCC is the commercial quality grade of JIS G3141 cold reduced carbon steel sheet and strip. It is a low carbon, annealed and skin-passed product used for roll formed sections, simple blanks and general press work.
Q: Can strip be supplied in widths under 100 mm?
Yes. Master coils are slit to narrow widths, commonly from around 10 mm upwards, with the width tolerance and burr limit agreed against the finished part rather than against the master coil.
Q: What coil inside diameter is standard?
Cold rolled strip coil is normally supplied with a 508 mm or 610 mm inside diameter, matched to the mandrel of the decoiler at the customer plant. Special diameters can be produced where the line requires them.
Q: Does slitting change the mechanical properties of the coil?
No. Slitting is a cold forming operation on the edge only, so grade, temper and mechanical properties are unchanged from the master coil. What it does set is the width tolerance, edge condition and burr height of the strip.
DC01 and SPCC cold rolled strip coil gives a press or tube line a continuous, dimensionally controlled feed of commercial quality low carbon steel. With slitting widths from about 10 mm upward, controlled edge burr, 508 mm or 610 mm coil bore and the delivery condition matched to the forming duty, a single master coil can serve several parts on the same shop floor.