Pickled hot rolled coil reduced further in thickness at room temperature, then annealed and skin-passed to give thin, flat steel with a smooth surface, close tolerances and good formability. Cold rolled coil (CRC) is the material of appliances, furniture, drums and car bodies, and the substrate for most galvanized, tinplated and pre-painted steel.
Also called
CRC
CR coil
CR sheet
Cold rolled sheet
CRCA
Cold reduced steel
Full hard coil
DC01
SPCC
ASTM A1008
AR
لفائف وألواح الصلب المدرفلة على البارد
ZH
冷轧卷板和冷轧薄板
DE
Kaltband und kaltgewalzte Bleche
FR
Bobines et tôles laminées à froid
ES
Bobinas y chapas laminadas en frío
IT
Coils e lamiere laminati a freddo
TR
Soğuk haddelenmiş rulo ve sac
RU
Холоднокатаный рулонный и листовой прокат
Main formsFull-hard coil, annealed and skin-passed coil, cut sheets, slit coil, narrow strip
Typical sizesThickness about 0.15–3.0 mm (0.3–2.0 mm most traded); width 600–1,850 mm, 1,000, 1,219, 1,250 mm common
Main standardsEN 10130, EN 10131, EN 10268, ASTM A1008, JIS G3141, GB/T 5213, IS 513
Typical usesAppliances, furniture, drums, panels, automotive parts, tubes, substrate for galvanizing and painting
Overview
Cold rolling starts with hot rolled coil that has been pickled to remove its scale. A tandem or reversing cold mill then reduces it by 50–90 % without heating, to as thin as 0.15 mm. The work hardens the steel, so the coil coming off the mill — 'full hard' — is stiff and brittle; it is either sold as such (for galvanizing lines that anneal in-line, or for roofing sheet where formability does not matter) or annealed to restore ductility, in batch furnaces or on a continuous annealing line, and finally given a light skin-pass rolling that sets the surface texture and removes the yield point.
The result is thinner, flatter and dimensionally more exact than hot rolled sheet, with a clean metallic surface that takes paint, enamel and coatings well. The trade name CRCA — cold rolled, close annealed — is common in India and the Gulf for annealed cold rolled sheet.
Grades are set by formability. EN 10130 runs from DC01 (commercial bending and simple forming) through DC03 and DC04 (drawing and deep drawing) to DC05, DC06 and DC07 (extra-deep drawing, interstitial-free). The equivalent families are SPCC to SPCG in JIS G3141 and CS, DS, DDS and EDDS in ASTM A1008. Higher-strength micro-alloyed grades (EN 10268 HC260LA–HC420LA) and dual-phase steels are used where weight must be saved, mainly in vehicles.
In the Middle East cold rolled coil is used by appliance, furniture, panel, drum and light tube makers, and in much larger volume as the feed for the region's galvanizing and colour-coating lines, which make roofing and cladding sheet. Cold rolling capacity exists in Saudi Arabia, the UAE and Iran, and imports come mainly from China, India, Korea, Japan and Turkey. MESteel publishes a weekly CRC CFR UAE price and a monthly Middle East import price for 1 mm CRC.
Forms & sizes
Cold rolled products are ordered by thickness × width, in coil or cut length, and by surface: matt (the normal skin-passed finish) or bright, and for exposed parts the surface quality (EN 10130 A or B). Thin sheet is still often quoted in gauge numbers; the gauge table below converts them to millimetres.
A 1 mm sheet weighs 7.85 kg/m². For sheets per tonne use the table on the hot rolled coils page, which applies equally to cold rolled sheet, or the steel weight calculator.
Full hard coil
As rolled, not annealed; hard and springy; used for galvanizing lines with in-line annealing and for profiled roofing sheet
Annealed coil (CRCA)
Batch or continuously annealed and skin-passed; the standard product for forming
Sheets
Cut to length; common sizes 1000 × 2000, 1219 × 2438 (4 × 8 ft), 1250 × 2500 and 1500 × 3000 mm
Slit coil and narrow strip
Slit to width for tube mills, roll formers and stamping; narrow cold rolled strip is also made to EN 10139 / EN 10140
Surface
Matt or bright finish; oiled or dry; surface quality A (normal) or B (best, for exposed panels)
Grade and standard, and the tolerance standard and class: for example 'DC01-A-m to EN 10130, tolerances EN 10131 normal'.
Full hard or annealed; for annealed, surface quality (A or B) and finish (matt or bright).
Thickness, width, coil weight and inside diameter (508 mm or 610 mm are common for cold rolled coil).
Oiled or dry, and the type of oil if the sheet will be painted or phosphated.
Flatness and edge condition (mill edge or trimmed) for cut sheets.
Ageing: ordinary DC01 can age and show stretcher strains if stored for months; order a non-ageing grade (DC04 or IF) for long storage or critical surfaces.
EN 10204 3.1 certificate with chemistry, yield, tensile, elongation and, for drawing grades, r and n values.
Quality checks
Measure thickness and width against EN 10131 (or the ordered standard), and weigh coils against the packing list.
Check the surface under good light for scratches, roll marks, rust, oil stains and pinholes, especially on B-quality material.
Check flatness of cut sheets on a table and look for edge wave and centre buckle.
Bend or cup-test a sample from drawing grades; stretcher strain lines after forming indicate aged material.
Inspect packing: coils and sheet packs should be wrapped, dry and free from condensation — cold rolled sheet rusts quickly in Gulf humidity.
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