Cold-rolled steel sheet

01

Pick the forming grade for your parts

U.S. Steel Košice's drawing steel page describes EN 10130 grades from DC01, for low-demand mouldings, bending and cold trimming, through DC03 for deep drawing, DC04 and DC05 for extra-deep drawing of automotive parts, to DC06 for complex large-area mouldings, made with vacuum-degassed steel. [1]

Its table gives maximum 0.2% proof strength, tensile range and minimum elongation (80 mm gauge): DC01 280 MPa, 270–410 MPa, 28%; DC03 240 MPa, 270–370 MPa, 34% with r90 ≥ 1.30; DC04 210 MPa, 270–350 MPa, 38% with r90 ≥ 1.60 and n90 ≥ 0.18; DC05 180 MPa, 270–330 MPa, 40%, r90 ≥ 1.90, n90 ≥ 0.20; DC06 170 MPa, 270–330 MPa, 41%, r90 ≥ 2.10, n90 ≥ 0.22. Carbon falls from 0.12% maximum for DC01 to 0.02% for DC06, which also allows up to 0.3% titanium. [1]

Editorial note: for bent cabinet and furniture panels DC01 is the producer's stated use; choose DC03 or higher only where parts are drawn, because the higher grades are specified for drawability rather than strength.

Buyers working to US standards specify cold-rolled sheet under ASTM A1008/A1008M; the ASTM designations are not the same grades as EN 10130, so compare the property requirements rather than the names. Its abstract lists commercial steel (CS Types A, B and C), drawing steel (DS Types A and B), deep drawing steel (DDS) and extra deep drawing steel (EDDS), plus structural steel grades 25[170] to 80[550], HSLA and HSLA-F grades, solution hardened and bake hardenable steels. Chemistry is checked by heat analysis, and tension and bending tests confirm yield and tensile strength, elongation and bake hardening index. Unless otherwise stated, sheet has a matte finish and is oiled. A1008 does not apply to steel strip covered by A109/A109M. [2]

A second mill's range shows how the same grades are offered. voestalpine's Cold-rolled steel strip range of supply (November 2024) lists EN 10130 DC01 to DC07 with their VDA 239-100 equivalents CR1 to CR6, giving transverse yield ranges of 140–280 MPa for DC01, 140–240 for DC03, 140–210 for DC04, 140–180 for DC05, 120–170 for DC06 and 100–150 for DC07, plus enamelling grades to EN 10209 and higher-strength families. It offers surfaces A (normal) and B (best) to EN 10130, or U and E to VDA 239-100, with oiled or prelube finishes, in thicknesses of 0.40–3.00 mm: coil up to 1,615 mm wide (2,000 mm maximum outside diameter, 500 or 600 mm bore), slit strip from 10 mm wide, and cut sheets from 210 mm wide and 200–6,700 mm long in packs up to 6 t; its greentec steel edition is stated at no more than 1.97 kg CO2e per kg cradle to gate. [4] Editorial calculation: voestalpine's 1,615 mm maximum width exceeds the 1,500 mm U.S. Steel Košice lists, and its DC01 yield range shows a 140 MPa lower bound that the EN 10130 maximum alone does not; ask the supplier which surface class (A/B or U/E) and which yield range its certificate will state. [4] [1]

Give the supplier the grade and standard (for example EN 10130 DC01), thickness and width, coil, slit coil or sheet length, thickness and flatness tolerance class, surface quality and finish, oiling, coil inner diameter and weight limits, quantity, and inspection certificate type.

02

Fix thickness and flatness tolerances

The same producer publishes EN 10131 thickness tolerances for steels with Re below 260 MPa: for example ±0.04 mm normal and ±0.030 mm reduced for 0.60–0.80 mm sheet up to 1,200 mm wide, ±0.05 mm and ±0.035 mm for 0.80–1.00 mm, ±0.06 mm and ±0.040 mm for 1.00–1.20 mm, and ±0.10 mm and ±0.060 mm for 1.60–2.00 mm; wider sheet up to 1,500 mm has slightly larger tolerances, and reduced tolerances are by prior agreement. [1]

Flatness tolerances (maximum deviation, mm) for the same steels are 10, 8 and 7 mm (normal) and 5, 4 and 3 mm (reduced) for widths of 600 to 1,200 mm at thicknesses below 0.70, 0.70–1.20 and 1.20 mm or more. It supplies 0.40–2.00 mm thickness, 750–1,500 mm width, cut sheets of 1,000–3,000 mm, and coils of about 500 or 600 mm inner diameter. [1]

Under ASTM, dimensional and mass tolerances for A1008 sheet come from the general-requirements specification ASTM A568/A568M, whose Annex A1 gives permissible variations in SI units, mandatory when the 'M' specification is ordered. A568 also states that the individual product specification prevails over the general requirements where they conflict, and sets the rounding rules for judging conformance. [3]

Editorial calculation: 1.00 mm sheet 1,250 mm wide falls in the over-1,200 mm column, so normal tolerance is ±0.06 mm, a range of 0.94–1.06 mm, or ±0.040 mm reduced; for a press brake or a fixed-gap tool, specify the reduced class if that spread matters. [1]

03

Cold-rolled sheet and coil sold beside hot-rolled, galvanised and prepainted coil

Listings include cold-rolled steel sheet and coil alongside hot-rolled, galvanised, galvalume and prepainted coils.

04

Grade, chemistry, mechanical properties, thickness and flatness class, and delivery form

Grade and tolerance class are separate choices: the EN 10130 grade fixes formability, while the EN 10131 normal or reduced class fixes how far thickness and flatness may vary at your width. [1]

05

Thickness, width, yield and elongation, surface class and chemistry for a cold-rolled sheet order

Yield runs the opposite way to drawability across the grades: maximum 0.2% proof strength falls from 280 MPa for DC01 to 170 MPa for DC06 while minimum elongation rises from 28% to 41%. [1]

06

Send the grade, size and tolerance data together

Paste it into your enquiry below or into an email to a maker, then replace every bracket.

Grade: [EN 10130 DC01–DC06 or equivalent]
Size: [thickness; width; length]
Tolerances: [thickness class; flatness class]
Form: [coil; slit coil; sheet; ID; weight]
Surface: [finish; oil]
Documents: [certificate type]

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