What is DC06 cold-rolled steel?
DC06 is made from interstitial-free steel: carbon is reduced to 0.02 % or less by vacuum degassing and the remaining carbon and nitrogen are tied up by titanium and/or niobium additions, so no interstitial atoms are left to pin dislocations. The consequences are exactly what a press shop wants — a very low, stable yield (typically 120–160 MPa), the highest plastic strain ratio of any carbon sheet (r90 ≥ 2.1, often 2.3–2.6), n90 ≥ 0.22, and no strain ageing at any storage time or bake temperature. Draw ratios of 2.3 and more, deep multi-stage parts, large stretch-formed panels with sharp feature lines and enamelled parts that must not fish-scale all belong to DC06. The surface is ordered B matt for painting; the steel is soft and marks easily, so handling and die cleanliness matter. It is produced on a handful of lines (Erdemir for some gauges, EU mills for the rest) and is a project item with a 4–6 week lead time.
Chemical composition
| Element | C | Mn | P | S | Ti |
|---|---|---|---|---|---|
| max. % (ladle) | 0.02 | 0.25 | 0.020 | 0.020 | 0.30 |
Typical IF heat: C 0.002–0.005, N ≤ 0.004, Ti 0.05–0.08 (or Nb 0.02), Mn 0.10.
Mechanical properties and deep-drawing indices
| Property | Requirement | Typical value | Note |
|---|---|---|---|
| Yield strength Rp0.2 | ≤ 180 MPa | 120–160 MPa | |
| Tensile strength Rm | 270–350 MPa | 280–320 MPa | |
| Elongation A80 | ≥ 38 % | 42–50 % | |
| r90 | ≥ 2.1 | 2.3–2.6 | guaranteed |
| n90 | ≥ 0.22 | 0.23–0.26 | guaranteed |
| Ageing | none (IF) | none |
Equivalent grades
| System | Grade | Note |
|---|---|---|
| DIN 1623 (old) | — | historic German |
| EN 10130 (1991) | Fe P06 | previous edition |
| JIS G3141 | SPCG | |
| ASTM A1008 | EDDS (IF) | |
| GB/T 5213 | DC06 |
Surface and oiling for an interstitial-free grade
| 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 | — |
IF steel is bought for its forming limit, so specify m finish, light oil and surface A unless the panel is visible; a bright finish on DC06 is a plating requirement, not a drawing one.
Thickness range and stock sizes
| Thickness | Widths × lengths | Availability |
|---|---|---|
| 0.50–1.0 mm | coil 1 000 / 1 250 / 1 500 mm; blanks | to order 4–6 weeks |
| 1.2–2.0 mm | coil 1 250 / 1 500 mm | to order 4–6 weeks |
Weight per m² and per sheet
| Thickness | kg/m² | 1 000 × 2 000 (kg) | 1 250 × 2 500 (kg) | 1 500 × 3 000 (kg) |
|---|---|---|---|---|
| 0.5 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 |
| 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 |
Uncoated; tolerances to EN 10131.
Forming, welding and painting
The deepest draws and most complex stretch-forms in carbon steel; low blank-holder force, generous radii, drawing oil, immaculate tooling. Bake-hardening is nil (no interstitials) — if a bake-hardening effect is wanted, order a BH grade instead. Spot and laser welding routine; the very low carbon gives soft, ductile welds. Painting and e-coat after phosphating; enamelling excellent (no fish-scaling from hydrogen traps when properly processed).
Where it is used
- Automotive super-deep-drawn outer and inner panels
- Complex multi-stage pressings and stretch-formed skins
- Enamelled bath tubs, boilers and appliance tubs
- Deep cans, cups and cartridges
- Parts requiring zero stretcher-strain risk after long storage
DC06 vs DC05
DC05 (r ≥ 1.9) is Al-killed ultra-low-carbon steel with a non-ageing guarantee; DC06 (r ≥ 2.1) is interstitial-free with no ageing mechanism at all and the highest drawability. If the part draws in DC05, stay there — DC06 costs about 15 USD/t more and takes longer. Choose DC06 for draw ratios above 2.3, for parts stored long before pressing, and where the specification names IF steel. See DC05 and the stock grade DC04.
Price
DC06 lands about 50 USD/t over the DC01 line because it is an imported interstitial-free grade — the premium is mostly the import leg and the minimum mill quantity, not the steel. Indicative FOB Istanbul range below.
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 for DC06 cold-rolled steel: coil eye-to-sky, VCI paper, edge protection. Loading: 20' one coil ≤ 20 t; 40' HC two coils. The HS heading depends on the product: 7208 / 7209 / 7210 for carbon strip, 7225 / 7226 where alloyed.
| Term | Detail |
|---|---|
| MOQ | One coil (10–20 t) |
| Incoterms | FOB Istanbul · CIF / CFR Gulf, Africa · DAP EU, Balkans, Iraq, Caucasus · DAP Aktau |
| Lead time | Imported to order 4–6 weeks |
| Packing | Coil eye-to-sky, VCI paper, edge protection |
| Container / truck | 20' one coil ≤ 20 t; 40' HC two coils |
| 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
Every DC06 cold-rolled steel coil leaves with an EN 10204 3.1 certificate that the number on the coil label points back to. Where the buyer's file needs an inspected release we organise 3.2 witnessing at the mill. We can also report the thickness measured across the strip width and the flatness at the cut edge.
How to order
Specify thickness × width or blank size, surface B / finish m, oiling, IF certification with r/n values, the part drawing and tonnage; we confirm mill and delivery within one working day.
Standards
- EN 10130:2006 — DC06, 1.0873
- EN 10131 — tolerances
- EN 10204 3.1
- Former EN 10130 Fe P06
Grades
Grade data sheets (chemistry, mechanicals, equivalents) are on our reference site: DC06 · DC05 · DC04
Frequently asked questions
What is DC06 steel?
The super-deep-drawing cold-rolled sheet of EN 10130 (1.0873): interstitial-free steel with C ≤ 0.02 %, yield ≤ 180 MPa, r90 ≥ 2.1, n90 ≥ 0.22 and no strain ageing — for the most complex automotive and enamelled pressings.
What is interstitial-free steel?
Steel in which the carbon and nitrogen that would otherwise sit between iron atoms are removed by vacuum degassing and tied up by titanium or niobium, giving very high drawability and no ageing.
What is the equivalent of DC06?
JIS SPCG, ASTM A1008 EDDS (IF), GB DC06; there is no DIN 1623 predecessor.
What is the lead time for DC06?
4–6 weeks — it is produced on a few lines against order and is not stocked in Turkey.