Overview
The HyperForm® range includes CR DP800-GI HyperForm, a ductile high-strength steel at 800MPa strenght level, enabling lightweighting of complex, structural components with no loss of crash performance. Analysis shows that lightweighting with CR DP800-GI HyperForm could reduce CO2 emissions over a vehicle’s life cycle when compared with conventional steels, against a neutral cost penalty. The HyperForm range is currently being expanded towards the 600 and 1000 MPa strength levels.
DX57 HyperForm is a premium formable steel grade with very good deep drawing and stretching properties in all directions.
Relationship with standards
Tata Steel |
VDA standard |
European standard |
Grade |
VDA 239-100 |
EN 10346:2015 |
DX57-GI HyperForm |
CR6-GI |
- |
CR DP800-GI HyperForm |
CR440Y780T-DH-GI |
- |
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Properties
Mechanical properties
Metallic coated steel for forming has the following mechanical properties.
DX57-GI HyperForm properties are measured transverse to the rolling direction.
CR DP800-GI HyperForm properties are measured parallel to the rolling direction.
Property range is indicated according to EN 10346, but properties meet equivalent VDA 239-100 specifications also.
Tata Steel |
Standard |
Coating type |
Yield strength 1 Re |
Tensile strength Rm |
Min. elongation after fracture A2 |
Min. r-value r90 |
Min . n-value n90 |
Min. BH2 |
Grade |
VDA 239-100 |
|
N/mm² |
N/mm² |
% |
|
|
N/mm2 |
DX57-GI HyperForm |
|
GI |
120-160 |
260-310 |
43 |
2.3 |
0.23 |
- |
CR DP800-GI HyperForm |
CR440Y780T-DH |
GI |
440 - 550 |
780 - 900 |
18 |
- |
0.13 |
30 |
1. If the yield point is not pronounced, the values apply to the 0.2% - proof strength Rp0.2 ; if the yield strength is pronounced, the values apply to the lower yield point ReL.
2. Decreased minimum elongation values apply for product thickness t ≤ 0.50mm (minus 4 units) and for 0.50mm ≤ t ≤ 0.70mm (minus 2 units).
Chemical composition
Tata Steel complies with the following cast analysis with maximum values in weight percentages.
Grade |
C |
Mn |
P |
S |
Al |
N |
Ti |
|
Max. |
Max. |
Max. |
Max. |
Min. |
Max. |
Max. |
DX57-GI HyperForm
|
0.01 |
0.2 |
0.02 |
0.02 |
0.01 |
- |
0.2 |
Grade |
C |
Mn |
Si |
P |
S |
Al |
Cr+Mo |
|
Max. |
Max. |
Max. |
Max. |
Max. |
Max. |
Max. |
CR DP800-GI HyperForm |
0.16 |
2.2 |
0.5 |
0.015 |
0.015 |
0.7 |
0.45 |
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Dimensions
Dimensional capability
Galvanised (GI) products
Thickness |
Max. width |
|
From - up to |
DX57-GI HyperForm |
CR DP800-GI HyperForm |
0.60 - 0.65 |
1800 |
- |
0.65 - 0.70 |
1820 |
- |
0.70 - 0.75 |
1780 |
- |
0.75 - 0.80 |
1710 |
- |
0.80 - 0.90 |
1600 |
- |
0.90 - 1.00 |
1490 |
1135 |
1.00 - 1.10 |
- |
1160 |
1.10 - 1.20 |
- |
1185 |
1.20 - 1.30 |
- |
1195 |
1.30 - 1.40 |
- |
1205 |
1.40 - 1.50 |
- |
1220 |
1.50 - 1.60 |
- |
1230 |
1.60 - 1.70 |
- |
1230 |
1.70 - 1.80 |
- |
1230 |
1.80 - 2.00 |
- |
- |
The minimum width of DX57 HyperForm is 900mm.
The minimum width of DP800 HyperForm is 1050mm.
Width refers to mill edge. Side-trimmed product is available on request.
Surface condition MB, MC available, as well as surface finish Regular and Improved.
DX57 HyperForm is also available with Magizinc Auto.
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