Mechanical properties

DP800 HyperForm® values are measured transverse to the rolling direction.

  Grade CR DP800 HyperForm®
Coating type   GI
Yield strength Rp0,2 N/mm2 440 - 550
Min. BH2 N/mm2 30
Tensile strength Rm N/mm2 780 - 900
Elongation % 18
Min. r-value   -
Min. n-value   0.13
For galvannealed grades (ZF) the minimum elongation before fracture is lowered by 2%.
Elongation after fracture A uses test piece length L0 = 80 mm.

Chemical composition

Tata Steel supplies the following cast analysis with maximum values in weight percentages:

  Grade CR DP800 HyperForm®
C Max. 0.18
Mn Max. 2.50
P Max. 0.050
S Max. 0.010
Si Max. 0.80
Al Max. 1.00
Cr+Mo Max. 1.40
All values in weight%.