DC01 steel (1.0330): properties, composition, equivalents
DC01 (1.0330, ex St12) is the base cold-rolled mild steel sheet of EN 10130: 140–280 MPa yield, 270–410 MPa tensile, 28 % elongation. Composition, forming class, coating variants and CR1/SPCC/08kp equivalents.
What is DC01?
DC01 is the commercial-quality cold-rolled steel sheet of EN 10130 — the flat, smooth, 0.4–3 mm material that becomes cabinets, panels, brackets, drums and light enclosures. The name decodes as D (flat product for cold forming), C (cold-rolled), 01 (the lowest forming class); the Werkstoff number is 1.0330 and the pre-1991 name St12 is still in daily use.
Chemistry is minimal — carbon ≤ 0.12 %, Mn ≤ 0.60 % — and the standard guarantees only a yield window of 140–280 MPa, a tensile range of 270–410 MPa and 28 % elongation. There is no guaranteed r-value or n-value, so DC01 suits bending, roll forming, mild stretching and shallow pressings; deep drawing moves the buyer to DC03, DC04 or DC06.
Surface quality A or B, finish b/g/m/r and the option of an electro-galvanized skin (DC01+ZE) are all ordered under EN 10130 / EN 10152 designations. JIS SPCC, BS CR1 and IS 513 CR1 are the same class; the American A1008 CS Type B is the nearest by intent but has no mechanical guarantees.
DC01 chemical composition
| Element | Mass % | Note |
|---|---|---|
| C | ≤ 0.12 | |
| Mn | ≤ 0.6 | |
| P | ≤ 0.045 | |
| S | ≤ 0.045 |
EN 10130:2006 Table 2, ladle analysis. Si and Al not limited. Al-killed or rimmed practice at the mill's option; Al-killed is standard in Europe today.
DC01 mechanical properties
| Thickness / condition | Yield strength ReH / Rp0.2 MPa (ksi) | Tensile strength Rm MPa (ksi) | Elongation A % | Hardness |
|---|---|---|---|---|
| 0.35 ≤ t < 0.70 mm | 140–280 (20.3–40.6) | 270–410 (39.2–59.5) | 28 | ≈ 60–90 HRB (typ.) |
| 0.70 ≤ t ≤ 3.0 mm | 140–280 (20.3–40.6) | 270–410 (39.2–59.5) | 28 | — |
| Skin-passed, first 8 days after rolling | ≤ 280 (yield-point elongation may return after) (≤ 40.6 (yield-point elongation may return after)) | 270–410 (39.2–59.5) | 28 | — |
EN 10130 Table 3: transverse test pieces, L0 = 80 mm. The yield range is wide because DC01 is not guaranteed for deep drawing; a yield-point elongation (stretcher strain) may reappear with time. For guaranteed r and n values order DC04–DC06.
DC01 equivalent grades
| Grade | System | Match | Why / differences |
|---|---|---|---|
| CR1 | BS (superseded British) | Identical | BS 1449-1 CR1 (commercial quality). |
| DC01 | GB/T (China) | Identical | GB/T 5213 adopted the EN name DC01 (formerly Q195/Q215 cold-rolled, or 08Al under GB 710). |
| IS 513 CR1 | IS (India) | Identical | IS 513 grade CR1 (formerly O): commercial quality cold-rolled. |
| SPCC | JIS (Japan) | Identical | JIS G3141 SPCC: C ≤ 0.15, Mn ≤ 0.60, P ≤ 0.100, S ≤ 0.035; Rm ≥ 270 MPa, A ≥ 28–37 % by thickness. Same commercial cold-rolled class. |
| CS Type B | ASTM / ASME | Near | ASTM A1008 Commercial Steel Type B: C ≤ 0.02–0.15, Mn ≤ 0.60; no guaranteed mechanicals — the US commercial-quality counterpart. |
| DC03 | EN (European) | Near | Next grade up (yield 140–240, A ≥ 34 %) for moderate drawing. |
| 08kp / 08ps | GOST (Russia/CIS) | Near | GOST 9045 / 16523 08kp (rimmed) and 08ps (semi-killed): C ≤ 0.10, Mn 0.25–0.50 — Russian commercial cold-rolled sheet. |
| DC04 | EN (European) | Functional | Deep-drawing grade (A ≥ 38 %, r90 ≥ 1.6) — order when DC01 splits. |
| S235JR | EN (European) | Functional | Hot-rolled structural steel of similar chemistry; not a cold-rolled forming grade and not interchangeable in surface or gauge. |
| DX51D | EN (European) | Functional | The uncoated cold-rolled base; DX51D is roughly DC01 substrate plus zinc. |
Identical = same composition and mechanical limits within rounding. Near = one limit differs (e.g. carbon max or impact temperature). Functional = interchangeable for most uses after an engineering check. Full cross-reference for DC01 →
Old and superseded designations
| Old name | Standard | Note |
|---|---|---|
| St12 | DIN 1623-1 (withdrawn 1991) | Still the everyday German/Turkish name for DC01. |
| St2 | DIN 1623 (older) | |
| Fe P01 | EN 10130:1991 | Renamed DC01 in the 1999 edition. |
| CR1 | BS 1449-1 | British designation; CR4 = DC04. |
| C | NF A 36-401 | Tôle C. |
Product forms and tolerance standards
Product forms: cold-rolled coil and sheet 0.35–3.0 mm, cut lengths and slit strip, electro-galvanized as DC01+ZE (EN 10152), narrow strip (EN 10139 as DC01 C290–C590).
Dimensional tolerances: thickness/width/flatness: EN 10131 (normal or special tolerances); surface quality A (minor defects allowed) or B (better face defect-free); surface finish b (bright), g (semi-matt), m (matt), r (rough).
Key property values
DC01 yield strength
140–280 MPa (20–41 ksi) transverse. The upper limit only applies for eight days after skin-passing; ageing can raise it and bring back stretcher-strain marks.
DC01 tensile strength
270–410 MPa (39–59 ksi). Typical certificates show 300–340 MPa.
DC01 elongation
≥ 28 % (A80, transverse) for t ≥ 0.7 mm; for 0.35–0.70 mm the minimum is reduced by 2 points.
DC01 hardness
Not specified by EN 10130. Typical 60–90 HRB (≈ 100–150 HV) as delivered; increases substantially after cold forming.
Physical properties
Density 7.85 g/cm³, E = 210 GPa. Thickness range 0.35–3.0 mm (EN 10130), widths to 2000 mm, coil weights to 30 t.
Weldability
Excellent weldability by resistance spot and seam welding, MAG, TIG and laser thanks to very low carbon. Spot-weld current ranges are the widest of any sheet steel. Electro-galvanized DC01+ZE needs slightly higher current and electrode dressing. No preheat, no PWHT.
Machining, forming and heat treatment
Sheared, punched, laser- and plasma-cut without issues; edge burr is small. Bending: 0 t inside radius is routinely achieved in 1–2 mm across the rolling direction. Roll forming excellent. Stretch forming and deep drawing are limited (no guaranteed r/n; earing and stretcher strains possible) — use DC04+ for draws. Painting, powder coating and e-coating: standard, after degreasing/phosphating; the surface finish letter (b/g/m) is chosen for paint adhesion.
Typical applications
- Electrical cabinets, enclosures, switchgear panels
- Domestic appliance housings and shelves
- Office furniture, lockers, shelving
- Automotive non-visible brackets and reinforcements
- Steel drums, pails and cans (with DC01 tinplate variants)
- Lighting fixtures, ventilation ducting, HVAC components
- Roll-formed profiles and drywall track (as DC01 or DX51D)
DC01 compared with related grades
Frequently asked questions
What is the difference between DC01 and S235JR?
DC01 is a cold-rolled forming sheet (EN 10130) sold by surface and gauge with a yield window of 140–280 MPa; S235JR is a hot-rolled structural steel (EN 10025-2) with a guaranteed minimum yield of 235 MPa and impact toughness. Chemistry overlaps, but they are ordered, priced and used differently: DC01 for pressed parts and enclosures, S235JR for load-bearing structure.
Is DC01 the same as St12?
Yes. St12 (DIN 1623) became Fe P01 (EN 10130:1991) and then DC01 (EN 10130:1999). Same steel, same use.
Can DC01 be deep drawn?
Only shallow draws. DC01 has no guaranteed r-value and may show stretcher strains. For drawn parts specify DC03 (moderate), DC04 (deep) or DC05/DC06 (extra deep).
What is DC01+ZE?
DC01 with an electrolytic zinc coating per EN 10152, e.g. DC01+ZE25/25 = 2.5 µm zinc on each face. It gives a paint-ready, lightly protected surface for indoor parts; hot-dip galvanized DX51D+Z is used for heavier corrosion protection.
What is the JIS equivalent of DC01?
SPCC (JIS G3141) — commercial-quality cold-rolled sheet. SPCD corresponds to DC03 and SPCE to DC04.
Related grades
Verified against EN 10130:2006; EN 10130:2006 Tables 2 and 3; EN 10131:2006 (tolerances); EN 10152:2017 (+ZE). Last checked: September 2026.