Properties
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 | Grade | DD11 |
|---|---|---|
| Yield strength ReL (N/mm2) | 1.5 ≤ t < 2 | 170 - 360 |
| 2 ≤ t < 11 | 170 - 340 | |
| Max. tensile strength Rm (N/mm2) | 440 | |
| Elongation (%) | 1.5 ≤ t < 2 | 23 |
| 2 ≤ t < 3 | 24 | |
| 3 ≤ t < 11 | 28 | |
| Min. bend test diameter | 1t |
Values are for test pieces taken transverse to the rolling direction:
t - material thickness in mm
Lower yield strength or 0.2% proof stress applies.
Test piece length L0 = 80mm for thicknesses <3mm and L0 = 5.65√S0 for thicknesses ≥3mm
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 | Grade | DD11 |
|---|---|---|
| C | Max. | 0.12 |
| Mn | Max. | 0.6 |
| P | Max. | 0.045 |
| S | Max. | 0.045 |
Not in EN 10111: 2008. Tata Steel’s own specification.
All values are in weight%.