Sidma Romania - Steel Service Center


Cold rolled coils and sheets

Cold rolled material is used in automotive, as well as for domestic appliances: metallic furniture, radiators, pipes, small profiles, storage or pressure recipients etc.
With an excellent formability, colled rolled coils and sheets generally have low carbon content so that they can be used for bending purposes or cold forming and it can be purchased in coils, sheets and strips. The cold rolled coils are the result of a continuous rolling process agains a lower temperature in comparison with hot rolled material, 450⁰C respectively.

The cold rolled coils and sheets are delivered in oiled and skin-passed condition so that both surfaces are protected against any atmosferical effects. This way, optimum conditions can be conserved for further future processing stages. The European standard EN 10130 clearly reveals recommendations for chemical composition, mechanical properties and the EN 10131 specifically regulates the surface condition status, sizes and tolerances admitted etc.

ProductCold rolled material is used in automotive, as well as for domestic appliances: metallic furniture, radiators, pipes, small profiles, storage or pressure recipients etc.
Quality DC 01, 02, 03, 04, 05, 06, 07 Different grades from DC01→DC07 refer to drawing properties of material. The grade is given by the chemical composition, carefull stages of production in lower temperature, pickeling&annealing&skin-passed stages, but totally relevant should we consider a various elongation grade between 28-40% corresponding to DC 01→ DC 07. Various combination of plasticity and &strength may rich a value of 150 MPa in case of DC07.
ThicknessMin.-Max: 0,3-3 mm
DimensionsWidth: Min-Max: 1 000-1 500 mm
Lenght: Min-Max: 400-10 000 mm
Sheets can be in standard format (1000X2000, 1250X2500, 1500X3000, 1500X6000 mm) or atipic format. Customized dimensions can be performed in our plant, valid only upon specific order. Over the

Other thicknesses and dimensions or according to other internationally recognized standards can be delivered upon request.

Click to calculate the weight: (S(mm)xW(mm)XL(mm)/1000x1000)x7.85 = kg/piece

Characteristics of skin-passed materials
Alfanumerical
symbol
Numerical
symbol
Clasification
acc. EN
10020
Surface condition Yield status Rₑ
a
Rm A⁸⁰
b
r₉₀
cd
n₉₀
c
Chemical composition 
% for liquid steel
MPa MPa min. % min min C max.% P max.% S max.% Mn max.% Ti max.%
DC 01 1.033 non-alloyᶠ A - -
  270/410
28 - - 0,12 0,045 0,045 0,6 -
B 3 months /280 ᵍ  ͥ
DC 03 1.0347 non-alloyᶠ A 6 months   270/370 34 1,3 - 0,10 0,035 0,035 0,45 -
B 6 months /240 ᵍ 
DC 04 1.0338 non-alloyᶠ A 6 months - 270/350 38 1,6 0,180 0,08 0,030 0,030 0,40 -
B 6 months /210 ᵍ 
DC 05 1.0312 non-alloyᶠ A 6 months - 270/330 40 1,9 0,200 0,06 0,025 0,025 0,035 -
B 6 months /180 ᵍ 
DC 06 1.0873 non-alloyᶠ A unlimited - 270/330 41 2,1 0,220 0,02 0,02 0,02 0,25 0,3ʲ
B unlimited /180 ʱ
DC 07 1.0898 non-alloyᶠ A unlimited - 350/310 44 2,5 0,230 0,01 0,02 0,020 0,20 0,2ʲ
B unlimited /180 ʱ
Source: EN 10130 Note: 1 Mpa= 1 N/mm²

 

Continuously cold rolled coils and sheets with yield point of  260 MPa≤ Rₑ<340 MPa¹⁾   dimensions in mm
Nominal Thickness
t
Normal tolerance ᵃ for a nominal width w Special tolerances (S) ᵃ for a nominal width w
w≤ 1200 1200< w≤ 1500 >1 500 w≤ 1200 1200< w≤ 1500 >1 500
0,35≤ t < 0,4 ± 0,04 ± 0,05 ± 0,06 ± 0,025 ± 0,030 ± 0,035
0,4> t ≤ 0,60 ± 0,04 ± 0,05 ± 0,06 ± 0,030 ± 0,035 ± 0,040
0,6> t ≤ 0,80 ± 0,05 ± 0,06 ± 0,07 ± 0,035 ± 0,040 ± 0,050
0,8> t ≤ 1,00 ± 0,06 ± 0,07 ± 0,08 ± 0,040 ± 0,050 ± 0,060
1,0> t ≤ 1,20 ± 0,07 ± 0,08 ± 0,10 ± 0,050 ± 0,060 ± 0,070
1,2> t ≤ 1,60 ± 0,09 ± 0,11 ± 0,12 ± 0,060 ± 0,070 ± 0,080
1,6> t ≤ 2,00 ± 0,12 ± 0,13 ± 0,14 ± 0,070 ± 0,080 ± 0,100
2,0> t ≤ 2,50 ± 0,14 ± 0,15 ± 0,16 ± 0,100 ± 0,110 ± 0,120
2,5> t ≤ 3,00 ± 0,17 ± 0,18 ± 0,18 ± 0,120 ± 0,130 ± 0,140
ᵃ În In case of cold welding, thickness tolerances can be increased with maximum of 50%, for a length of 10 meters. This increase can be applied in case of all thicknesses and, if there are no specific date in the customers`order, normal and special tolerances are applied, plus or minus.
Source: EN 10131       ¹⁾1 MPa= 1 N/mm²
Sidma Romania - Steel Service Center Str Oxigenului 2, Sat Căldăraru, Comuna Cernica, Jud. Ilfov 077035
Phone: +4 021 20.90.270, Fax: + 4 021 20.90.115
office@sidma.ro

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