Material number 1.0330: DC01
1.0330 is the European material number (Werkstoffnummer, EN 10027-2) for DC01, cold-rolled low-carbon steel for cold forming specified in EN 10130.
What 1.0330 means
EN 10027-2 material numbers have the form 1.XXYY: the leading 1 is steel; the next two digits give the steel group (03 → steels with < 0.12 % C or Rm < 400 MPa); the last two digits are a sequential number within that group. The number is unique to one composition and survives name changes, which is why 1.0330 has stayed constant while the symbolic name moved from St12 to DC01.
DC01 at a glance
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.
Full data sheet for DC01 → · Equivalent grades →