Overview
Hot-rolled steel for cold forming is used for bending and deep drawing.
Tata Steel's forming grades offer consistency for reliable processing and low carbon content for excellent welding performance.
The optimised chemistry of Tata Steel grade DD14+ offers enhanced formability for complex components.
DD13WR is particularly suitable for use in wheel rims because of its low aluminium content and controlled Mn:Si ratio. The low carbon content gives DD13WR excellent welding performance.
Applications
Automotive components
Domestic appliance components
Furniture
Switch gear panels
Wheel rims
Tubes and sections
Relationship with standards
Tata Steel offers hot-rolled steel for forming in grades that comply with
EN 10111: 2008 and in a special Tata Steel grade as shown in the table below.
All grades are available in qualities suitable for galvanising.
As the EN standard applies only to steel ≤ 11mm thick, please consult us about the properties of steel in other thicknesses.
|
European standard
|
Germany
|
|
EN 10111: 2008
|
DIN 1614 part 2
|
|
DD11 2
|
StW22
|
|
DD12
|
RRStW23
|
|
DD13
|
StW24
|
|
DD13WR1
|
-
|
|
DD14
|
-
|
|
DD14+ 1
|
-
|
1. Not in EN 10111: 2008 . Tata Steel’s own specification.
2. DD11 products should be used within one month of their availability.
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Properties
Mechanical properties
The values shown for the mechanical properties in the table below are for test pieces taken transverse to the rolling direction:
|
EN 10111:2008
|
Yield strength ReL 1
|
Max. tensile strength Rm
|
Min. elongation after fracture A
|
Min. bend test diameter
|
|
|
N/mm²
|
N/mm²
|
%
|
|
|
Grade
|
|
|
|
L0 = 80mm
|
|
L0 = 5.65√S0
|
|
|
|
1.5 ≤ t < 2
|
2 ≤ t < 11
|
|
1.5 ≤ t < 2
|
2 ≤ t < 3
|
3 ≤ t < 11
|
|
|
DD11
|
170 - 360
|
170 - 340
|
440
|
23
|
24
|
28
|
1t
|
|
DD12
|
170 - 340
|
170 - 320
|
420
|
25
|
26
|
30
|
0t
|
|
DD13
|
170 - 330
|
170 - 310
|
400
|
28
|
29
|
33
|
0t
|
|
DD14
|
170 - 310
|
170 - 290
|
380
|
31
|
32
|
36
|
0t
|
|
DD14+ 2
|
170 - 250
|
|
340
|
36
|
36
|
39
|
0t
|
1. Lower yield strength or 0.2% proof stress applies.
2. Not in EN 10111: 2008. Tata Steel’s own specification.
t - material thickness in mm
| DD13WR1 |
Yield strength ReL
|
Tensile strength Rm
|
Elongation after fracture Adp5
|
|
Typical
|
N/mm²
|
N/mm²
|
%
|
|
Test direction
|
|
|
t > 3mm
|
|
Transverse
|
271
|
379
|
38.4
|
|
Longitudinal
|
252
|
369
|
40.3
|
1. Not in EN 10111: 2008. Tata Steel’s own specification.
t - material thickness in mm
Chemical composition
Hot-rolled steel for forming meets the requirements of the cast analysis in the standard as shown in the table below:
|
EN 10111: 2008
|
C
|
Mn
|
P
|
S
|
|
Grade
|
Max.
|
Max.
|
Max.
|
Max.
|
|
DD11
|
0.120
|
0.60
|
0.045
|
0.045
|
|
DD12
|
0.100
|
0.45
|
0.035
|
0.035
|
|
DD13
|
0.080
|
0.40
|
0.030
|
0.030
|
|
DD13WR1
|
0.068
|
0.036
|
0.012
|
0.0065
|
|
DD14
|
0.080
|
0.35
|
0.025
|
0.025
|
|
DD14+1
|
0.055
|
0.25
|
0.020
|
0.020
|
1. Not in EN 10111: 2008. Tata Steel’s own specification.
All values are in weight%.
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Dimensions
Dimensional capability – non-pickled.
Dimensions in mm.
| Thickness |
Max. width |
|
|
|
|
| From - up to |
DD11 |
DD12 |
DD13 |
DD13WR |
DD14 |
DD14+ |
| 1.47 - 1.50 |
1300 |
1300 |
1300 |
- |
1300 |
- |
| 1.50 - 1.60 |
1330 |
1330 |
1330 |
1250 |
1330 |
1250 |
| 1.60 - 1.70 |
1405 |
1405 |
1405 |
1299 |
1405 |
1275 |
| 1.70 - 1.80 |
1480 |
1480 |
1480 |
1399 |
1480 |
1315 |
| 1.80 - 1.90 |
1555 |
1555 |
1555 |
1511 |
1555 |
1511 |
| 1.90 - 2.00 |
1630 |
1630 |
1630 |
1511 |
1630 |
1511 |
| 2.00 - 2.20 |
1705 |
1705 |
1705 |
1600 |
1705 |
1600 |
| 2.20 - 2.40 |
1820 |
1820 |
1820 |
1600 |
1820 |
1600 |
| 2.40 - 2.50 |
1925 |
1925 |
1925 |
1600 |
1925 |
1600 |
| 2.50 - 2.60 |
1970 |
1970 |
1970 |
1749 |
1970 |
1749 |
| 2.60 - 2.70 |
2020 |
2020 |
2020 |
1749 |
2020 |
1749 |
| 2.70 - 2.90 |
2070 |
2070 |
2070 |
1749 |
2070 |
1749 |
| 2.90 - 12.50 |
2070 |
2070 |
2070 |
1830 |
2070 |
1830 |
| 12.50 - 16.50 |
2070 |
1830 |
1830 |
1830 |
1830 |
1830 |
| 16.50 - 20.00 |
2070 |
- |
- |
- |
- |
- |
The minimum width is 900mm. Widths smaller than 900mm are available - please contact us.
EN10111: 2008 only specifies material up to 11mm thick.
Material exceeding this thickness is supplied to Tata Steel own specification.
Dimensional capability – pickled.
Dimensions in mm.
|
Thickness
|
Max. width
|
|
From - up to
|
DD11
|
DD12
|
DD13
|
DD13WR
|
DD14
|
DD14+
|
|
1.50 - 1.60
|
1330
|
1330
|
1330
|
1250
|
1330
|
1250
|
|
1.60 - 1.70
|
1405
|
1405
|
1405
|
1299
|
1405
|
1275
|
|
1.70 - 1.80
|
1480
|
1480
|
1480
|
1399
|
1480
|
1315
|
|
1.80 - 1.90
|
1555
|
1555
|
1555
|
1511
|
1555
|
1511
|
|
1.90 - 2.00
|
1630
|
1630
|
1630
|
1511
|
1630
|
1511
|
|
2.00 - 2.20
|
1705
|
1705
|
1705
|
1530
|
1705
|
1530
|
|
2.20 - 2.40
|
1820
|
1820
|
1820
|
1530
|
1820
|
1530
|
|
2.40 - 2.50
|
1925
|
1925
|
1925
|
1530
|
1925
|
1530
|
|
2.50 - 2.60
|
1970
|
1970
|
1970
|
1530
|
1970
|
1530
|
|
2.60 - 2.70
|
2030
|
2030
|
2030
|
1530
|
2030
|
1530
|
|
2.70 - 4.76
|
2070
|
2070
|
2070
|
1530
|
2070
|
1530
|
|
4.76 - 4.90
|
2040
|
2040
|
2040
|
1530
|
2040
|
1530
|
|
4.90 - 5.00
|
2000
|
2000
|
2000
|
1530
|
2000
|
1530
|
|
5.00 - 5.10
|
1960
|
1960
|
1960
|
-
|
1960
|
-
|
|
5.10 - 5.20
|
1925
|
1925
|
1925
|
-
|
1925
|
-
|
|
5.20 - 5.30
|
1885
|
1885
|
1885
|
-
|
1885
|
-
|
|
5.30 - 5.40
|
1850
|
1850
|
1850
|
-
|
1850
|
-
|
|
5.40 - 5.50
|
1820
|
1820
|
1820
|
-
|
1820
|
-
|
|
5.50 - 5.60
|
1785
|
1785
|
1785
|
-
|
1785
|
-
|
|
5.60 - 5.70
|
1755
|
1755
|
1755
|
-
|
1755
|
-
|
|
5.70 - 5.80
|
1725
|
1725
|
1725
|
-
|
1725
|
-
|
|
5.80 - 5.90
|
1695
|
1695
|
1695
|
-
|
1695
|
-
|
|
5.90 - 6.35
|
1670
|
1670
|
1670
|
-
|
1670
|
-
|
The minimum width is 900mm.
Widths smaller than 900mm and/or thicknesses up to 20mm may be available - please contact us.
Tolerances
Tolerances for wide strip and slit wide strip comply with standard EN 10051: 2010 (click here).
Tighter tolerances are available, please contact us.
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