Cold-rolled

Steel for forming

Cold-rolled steel for cold forming and deep drawing is available in a range of grades.  Each grade is designed for particular applications – allowing you to pick the best steel for your product.

Our forming steel is available in a choice of widths up to 2050 mm and thicknesses up to 3 mm. This provides opportunities for cutting waste and maximising yield. These products are made using one of two process routes:

  • continuous annealing (CA)
  • batch annealing (BA)

 

Cold-rolled coil
Cold-rolled annealing line, Port Talbot, UK
Product specification
Cold-rolled steel for forming is currently available in the following grades

EN-Engineering-Product-Cold-rolled-Forming-DC01 TSE

DC01
Specification details for DC01

EN-Engineering-Product-Cold-rolled-Forming-All Grades OverviewTSE

Overview

Applications

  • Automotive components and body panels
  • Components for building
  • Domestic appliances
  • Electrical goods
  • Furniture
  • Radiators
  • Tubes

Relationship with standards

Cold-rolled steel for forming complies with European standard EN 10130: 2006 and is available in the grades shown below.

European standard

EN 10130: 2006

Grade

DC01

DC03

DC04

DC05

DC06

 

EN-EngineeringAutomotive-Product-Cold-rolled-All Grades Surface aspectsTSE

Surface aspects

Surface quality

 

Surface quality A

Defects that do not influence the formability or the application of surface coatings are permitted. They are defects such as pores, minor scratches, slight indentations, small grooves or slight discolouration. 

Surface quality B

The better side must be free of defects that can spoil the uniform appearance of a high-quality paint or of an electrolytic coating. The other side must at least conform to surface quality A. Not all combinations of thickness and width are available in surface quality B. Please contact us for details. 

Inspected side

As a rule, the upper side of the strip is inspected; on request, the strip can be wound so that the inspected side is the underside.

 

Surface texture/roughness

Cold-rolled annealed and skin-passed steel is available in several surface textures. Unless specified otherwise, Tata Steel will supply normal roughness. The table below shows the range of surface textures according to EN 10130:2006.

 

 

Roughness Ra (µm)

EN 10130: 2006

Symbol

cut off 0.8 mm

extra-bright 1

-

≤ 0.3

bright

b

≤ 0.4

semi-bright

g

≤ 0.9

normal

m

0.6 - 1.9

rough

r

> 1.6

extra-rough 2

-

3.5 - 5

1. Not in EN 10130:2006 - Tata Steel’s own specification. Please contact us regarding the availability
2. Not in EN 10130:2006 - Tata Steel’s own specification, measured with a cut off of 2.5 mm
Other surface textures are available to meet your requirements - please contact us for details.

Preservative oil

The standard oil applied by Tata Steel acts as a protective coating. Other types of oil may be available to meet your requirement.
Tata Steel offers a range of oiling levels from 0.25 - 1.7 g/m2 per side.
Other oiling levels are available on request. Tata Steel is not responsible for the risk of corrosion during storage or shipment if material is ordered in the un-oiled condition.

Surface cleanliness

Tata Steel can guarantee improved surface cleanliness on request for batch-annealed products. The cleanliness is tested with a tape test, in which the loss of reflection is measured. The reflection gives an indication of the oil residue on the annealed product. Two levels of loss of reflectivity are available for batch annealed products: a maximum of 20% or a maximum of 30%. Continuously-annealed products typically exhibit a loss of reflection up to around 10%.

 

 

EN-Engineering-Product-Cold-rolled-Forming-DC01-Properties TSE

Properties

Properties


Mechanical properties

Cold-rolled steel for forming has the following mechanical properties (skin-passed) - these are measured transverse to the rolling direction:

EN 10130: 2006 Grade DC01
Max. yield strength Re 1,2,6 N/mm2 280
Tensile strength Rm N/mm 270 - 410
Elongation 3 % 28
r90-value 4,5   -
n90-value 4   -
1. The values of the yield strength are those of the 0.2% yield strength for products with no definite yield point and the lower yield strength ReL for the other products.
2. For thicknesses > 0.5 mm and ≤ 0.7 mm, the value for yield strength is increased by 20 N/mm2.
   For thicknesses ≤ 0.5 mm, the value is increased by 40 N/mm2.
3. For thicknesses > 0.5 mm and ≤ 0.7 mm the minimum elongation after fracture is decreased by 2%. For thicknesses ≤ 0.5 mm the minimum elongation after fracture is decreased by 4%.
   Elongation after fracture A uses test piece length L0 =  80 mm.
4. The r- and n- values apply to a thickness of t ≥ 0.5 mm.
5. For a thickness of t > 2 mm, the r90 value or r-average value is decreased by 0.2.
6. For design purposes, a lower yield strength ReL of at least 140 N/mm2 can be assumed.
 

Chemical composition

Cold-rolled steel for forming supplied by Tata Steel comply to the following cast analysis:

EN 10130: 2006 Grade DC01
C Max. 0.12
Mn Max. 0.60
P Max. 0.045
S Max. 0.045
All values are in weight%.

EN-Engineering-Product-Cold-rolled-Forming-DC01-Dimensions TSE

Dimensions

Dimensional capability - Continuously annealed (CA)

Dimensions in mm.

Thickness Max. width
From - up to DC01
0.37 - 0.45 1390
0.45 - 0.50 1470
0.50 - 0.60 1550
0.60 - 0.75 1710
0.75 - 1.60 1820
1.60 - 1.70 1750
1.70 - 1.80 1650
1.80 - 1.90 1525
1.90 - 1.95 1520
1.95 - 2.00 1500
Minimum width is 900 mm for thicknesses below 0.5 mm.
Minimum width is 825 mm for all other thicknesses.
 

Dimensional capability – Batch annealed (BA)

Dimensions in mm.

Thickness Max. width
From - up to DC01
0.35 - 0.37 1300
0.37 - 0.40 1630
0.40 - 0.50 1690
0.50 - 0.70 1920
0.70 - 0.80 1970
0.80 - 1.00 2030
1.00 - 2.40 2030
2.40 - 2.50 1960
2.50 - 2.60 1940
2.60 - 2.70 1920
2.70 - 2.80 1850
2.80 - 2.90 1790
2.90 - 3.00 1730
The minimum width is 710 mm.
Other dimensions may be available – please contact us.
 

Tolerances

Tolerances comply with standard EN 10131: 2006.
Tighter tolerances are available, please contact us for details.