Properties
Properties
Mechanical properties
The available grades have the following mechanical properties - these are measured perpendicular to the rolling direction (transverse test pieces):
Rephosphorised grades
Tata Steel | Grade | HC220P |
---|---|---|
Yield strength Re 1 | N/mm2 | 220 - 270 |
Tensile strength Rm | N/mm2 | 320 - 400 |
Elongation 2 | % | 32 |
Min. r-value 3 | 1.3 | |
Min. n-value n90 | 0.16 |
1. If the yield strength is pronounced (yield flag), the values apply to the lower yield point (ReL).
2. When thickness ≤ 0.7mm, the minimum value for elongation is reduced by 2%.
Elongation after fracture A uses test piece length L0 = 80 mm.
3. For products with thickness > 2mm the minimum r90 is reduced by 0.2.
Chemical composition
Cold-rolled high-strength steels supplied by Tata Steel comply to the following cast analysis with maximum values unless otherwise shown:
Rephosphorised grades
Tata Steel | Grade | HC220P |
---|---|---|
C | Max. | 0.07 |
Mn | Max. | 0.7 |
Si | Max. | 0.5 |
P | Max. | 0.08 |
S | Max. | 0.025 |
Al | Min. | 0.015 |