What is DC01 cold-rolled steel?
DC01 is EN 10130's first cold-rolled grade: D for flat products for cold forming, C for cold-rolled, 01 for the base quality. It is made by pickling hot-rolled coil (hence the Turkish DKP, from the French décapé), cold-reducing it to gauge, annealing and skin-passing — which gives the flat, smooth, scale-free surface and the tight thickness tolerance that hot-rolled sheet cannot offer. The standard limits yield to 280 MPa (typically 180–240), sets tensile at 270–410 MPa and elongation at 28 % minimum (A80), and allows 0.12 % carbon and 0.60 % manganese; Erdemir heats run around C 0.05, Mn 0.25. That makes DC01 a bending and light-forming grade: it folds, roll-forms, punches, spot-welds and takes paint or powder perfectly, but it is not guaranteed for drawing — DC03 and DC04 exist for that. Because it is skin-passed it may show stretcher strains (Lüders lines) if stored for months and then stretched; order it "non-ageing" only in DC03 and above. Surface A (normal) is the stock standard, B (best) for visible painted parts; finish m (matt) is standard, b (bright) for plating. Supplied oiled.
Chemical composition
| Element | C | Mn | P | S |
|---|---|---|---|---|
| max. % (ladle) | 0.12 | 0.60 | 0.045 | 0.045 |
Typical heat: C 0.04–0.06, Mn 0.20–0.30, Si ≤ 0.03, Al-killed.
Mechanical properties and formability
| Property | Requirement | Typical value | Note |
|---|---|---|---|
| Yield strength Rp0.2 | ≤ 280 MPa | 180–240 MPa | ≤ 8 days after production: no upper limit |
| Tensile strength Rm | 270–410 MPa | 300–350 MPa | |
| Elongation A80 | ≥ 28 % | 32–38 % | ≥ 0.70 mm; thinner minus 2 % |
| Bend test | 0 × t (180°) | passes | |
| r90 / n90 | not specified | ≈ 1.0 / 0.17 | bending grade |
Equivalent grades
| System | Grade | Note |
|---|---|---|
| DIN 1623 (old) | St 12 | historic German |
| EN 10130 (1991) | Fe P01 | previous edition |
| JIS G3141 | SPCC | |
| ASTM A1008 | CS Type B | |
| GB/T 5213 | DC01 |
Surface finish, roughness and oiling
| Code | Meaning | Ra (µm) | Typical use |
|---|---|---|---|
| A | normal surface — minor defects (pores, scratches, slight marks) allowed | — | general fabrication, hidden parts |
| B | best surface — the better side free of defects that impair a uniform paint finish | — | visible painted or plated parts |
| b (bright) | smooth roll finish | ≤ 0.4 | chrome plating, decorative |
| g (semi-bright) | standard finish | 0.4–0.9 (typ. 0.6–1.9) | painting, powder coating |
| m (matt) | shot-blasted rolls | 0.6–1.9 | deep drawing, paint adhesion |
| r (rough) | heavy texture | > 1.6 | special |
| oiling | light rust-preventive oil both sides (standard); dry or heavy oil on request | — |
Order example: plain cold-rolled is ordered as "DC01 A m, oiled". Turkish name DKP (dekape = pickled) refers to the pickled substrate of all cold-rolled sheet.
Thickness range and stock sizes
| Thickness | Widths × lengths | Availability |
|---|---|---|
| 0.40–0.70 mm | coil 1 000 / 1 250 mm; sheet 2 000 / 2 500 | stock |
| 0.80–1.50 mm | coil 1 000 / 1 250 / 1 500 mm; sheet to 3 000 | stock |
| 2.0–3.0 mm | coil 1 250 / 1 500 mm; sheet 2 500 / 3 000 / 6 000 | stock |
| slit strip | any width 20–1 500 mm | slitting in Dilovası 3–5 days |
Weight per m² and per sheet
| Thickness | kg/m² | 1 000 × 2 000 (kg) | 1 250 × 2 500 (kg) | 1 500 × 3 000 (kg) |
|---|---|---|---|---|
| 0.4 mm | 3.14 | 6.3 | 9.8 | 14.1 |
| 0.5 mm | 3.93 | 7.9 | 12.3 | 17.7 |
| 0.6 mm | 4.71 | 9.4 | 14.7 | 21.2 |
| 0.7 mm | 5.50 | 11.0 | 17.2 | 24.7 |
| 0.8 mm | 6.28 | 12.6 | 19.6 | 28.3 |
| 0.9 mm | 7.07 | 14.1 | 22.1 | 31.8 |
| 1 mm | 7.85 | 15.7 | 24.5 | 35.3 |
| 1.2 mm | 9.42 | 18.8 | 29.4 | 42.4 |
| 1.5 mm | 11.78 | 23.6 | 36.8 | 53.0 |
| 2 mm | 15.70 | 31.4 | 49.1 | 70.7 |
| 2.5 mm | 19.63 | 39.3 | 61.3 | 88.3 |
| 3 mm | 23.55 | 47.1 | 73.6 | 106.0 |
Uncoated; thickness tolerances to EN 10131 (e.g. ±0.06 mm at 1.0 mm, 1 250 wide).
Forming, welding and painting
Bends flat (0 × t) in any direction; roll-forms into profiles, ducts and tubes; punches cleanly with 6–8 % clearance. Spot, seam and MAG welding without preparation — the oil film should be wiped near the weld for a clean bead. For painting: degrease (alkaline), phosphate or use a wash primer; the matt finish gives excellent adhesion for powder coating and e-coat. Plating (chrome, zinc) prefers the bright (b) finish. Not for deep drawing — use DC03/DC04 — and not for outdoor use without coating: cold-rolled sheet rusts within days if the oil is removed.
Where it is used
- Electrical cabinets, enclosures and switchgear panels
- Steel furniture, lockers, shelving and doors
- HVAC ducting, plenums and casings
- Drums, cans and light containers
- Roll-formed tubes (DKP boru) and light profiles
- Automotive and appliance brackets, covers and non-visible parts
DC01 vs DC03 vs DC04
DC01 bends; DC03 draws; DC04 deep-draws. Each step tightens the yield window and raises elongation (28 → 34 → 38 %) with cleaner chemistry, at 10–20 USD/t per step. Most sheet-metal work is DC01; move up only when a part is pressed with a draw depth or shows splits and orange-peel in DC01. For the same sheet with a zinc coating see DX51D galvanized; for a thicker, cheaper substrate with a scaled surface, hot-rolled coil or HRPO.
Price
DC01 is the base of the cold-rolled list; the bands below are the month's indicative FOB Istanbul ranges for thin and medium gauges from stock. Surface B, bright finish and slit widths are priced per ton on top.
Bands from our weekly export list (September 2026), FOB Istanbul, full-container quantities, excluding freight and certificates. Firm price per project on RFQ within one working day.
Export and packing
Packing of DC01 cold-rolled steel: coils on cradles (eye-to-sky, VCI wrap, four straps, 5–25 t) or sheet packs on skids up to 3 t with interleaving paper and corner protectors; 20' ≈ one coil (≤ 20 t), 40' HC ≈ two coils or 24 t of sheet. Tariff 7210 / 7209 / 7208.
| Term | Detail |
|---|---|
| MOQ | One coil (5–20 t) or 5 t of sheet |
| Incoterms | FOB Istanbul · CIF / CFR Gulf, Africa · DAP EU, Balkans, Iraq, Caucasus · DAP Aktau |
| Lead time | Stock 0.40–3.0 mm: 3–5 working days; slit strip 5–8 days |
| Packing | Coil eye-to-sky, VCI paper; sheet on skids ≤ 3 t with interleaving paper |
| Container / truck | 20' one coil ≤ 20 t; 40' HC two coils or 24 t sheet |
| Documents | Invoice, packing list, EN 10204 3.1 (3.2 on request), certificate of origin; SASO / SONCAP / PVoC on request |
| Payment | 30% advance, balance against B/L copy; L/C at sight for orders above 100 t |
Certificates and testing
DC01 cold-rolled steel is delivered with the mill certificate EN 10204 3.1 — heat number, ladle analysis, tensile and impact results and the delivery condition. Third-party 3.2 certification (Lloyd's, BV, TÜV, SGS), ultrasonic testing to EN 10160 and extra Charpy tests at a lower temperature are ordered per lot.
How to order
Specify thickness × width × (length), surface (A / B), finish (m / b), oiling, coil weight, and tonnage; give the part type if you are unsure between DC01 and a drawing grade.
Standards
- EN 10130:2006 — DC01, 1.0330
- EN 10131 — tolerances of cold-rolled flat products
- EN 10204 3.1
- Former DIN 1623 St 12 / EN 10130 Fe P01
Grades
Grade data sheets (chemistry, mechanicals, equivalents) are on our reference site: DC01 · DC03 · DC04
Frequently asked questions
What is DC01 steel?
The base cold-rolled low-carbon sheet of EN 10130 (1.0330, ex St 12): yield ≤ 280 MPa, tensile 270–410 MPa, elongation ≥ 28 %, for bending, roll-forming, punching and painting; known in Turkey as DKP sac.
What is DKP sheet?
The Turkish trade name for cold-rolled steel sheet (from décapé = pickled); the standard grade is DC01, the drawing grades DC03–DC06.
What is the equivalent of DC01?
DIN St 12, JIS SPCC, ASTM A1008 CS Type B, GB Q195/DC01 — all commercial-quality cold-rolled sheet.
What is the difference between DC01 and DC04?
DC04 is a deep-drawing grade with lower yield (≤ 210 MPa), 38 % elongation, guaranteed r/n values and cleaner chemistry; DC01 is the bending grade. DC04 costs about 20 USD/t more.
Does DC01 rust?
Yes — it is uncoated and protected only by a thin oil film; parts must be painted, powder-coated or plated, or the galvanized DX51D used instead.
What thickness of DC01 do you stock?
0.40–3.0 mm in 1 000–1 500 mm widths, as coil and cut sheet, at our Dilovası warehouse; thinner and thicker to order.