EN_US-Product-Metallic coated-AHSS UHSS-All Grades OverviewTSUK
Meeting design demands
Body-in-white design demands affordability and improved crash performance, combined with low weight. Our advanced high-strength steels (AHSS) and ultra high-strength steels (UHSS) help meet those demands and provide good formability.
Tata Steel supports customers in finding the optimum balance between cost, lightweight design potential and performance for specific applications. Total cost of ownership (TCO) concept studies identify and quantify the TCO reduction potential offered by Tata Steel’s advanced steel solutions.
Applications
Applications for our advanced high-strength and ultra high-strength steels include:
- automotive A-, B- and C-pillars
- box girders for chassis
- crash boxes
- crossbeams and cross members
- roofbows
- door and sill reinforcements
- support components
Relationship with standards
Tata Steel offers the following grades:
| Grade | VDA 239-100 | EN 10346:2015 |
|---|---|---|
| Dual-phase | ||
| CR DP600-GI/GA | CR330Y590T-DP-GI/GA | HCT590X+Z/ZF |
| CR DP600-GI HyperForm®2 | CR330Y590T-DH-GI 1 | - |
| CR DP800-GI/GA | CR440Y780T-DP-GI/GA | HCT780X+Z/ZF |
| CR DP800-GI HyperForm®2 | CR440Y780T-DH-GI | - |
| CR DP1000LY-GI2 | CR590Y980T-DP-GI | HCT980X+Z |
| CR DP1000HY-GI2 | CR700Y980T-DP-GI | HCT980XG+Z |
Please contact us for AHSS with MagiZinc® coating.
1 VDA draft
2 Produced in the Netherlands. For further information click here.
EN-Product-Metallic coated-All Grades Coatings Surface aspectsTSUK
Coatings
Three types of metallic coating are available:
Pure zinc
Galvanised steel (Z/GI) is coated with an almost pure zinc coating (>99% zinc).
Zinc-iron alloy
Produced in the Netherlands. For further information click here.
MagiZinc
MagiZinc steel (ZM) is coated with a zinc coating containing additional magnesium and aluminium.
Coating weight
| Coating | Minimum | Maximum |
|---|---|---|
| Pure zinc (Z/GI) | 90 (6 µm/side) | 275 (20 µm/side) |
| MagiZinc (ZM)1 | 70 (5 µm/side) | 310 (22 µm/side) |
Coating weight measured in g/m2 double-sided (µm, per side).
Surface quality
Surface quality complies with standard: EN 10346:2015. Galvanised steels are available in surface quality A, B or C.
Also, Serica FLO® surface quality produced in the Netherlands. For further information click here.
Surface quality A: as coated surface
Imperfections such as pimples, marks, scratches, pits, variations in surface appearance, dark spots, stripe marks and light passivation stains are permissible.
Stretch levelling breaks or run-off marks may appear. Coil breaks and stretcher strains may also appear.
Surface quality B: improved surface
With this surface quality, small imperfections such as stretch levelling breaks, skin pass marks, slight scratches, indentations, surface structure, zinc run-off marks and light passivation stains are permissible.
Surface quality C: best quality surface
Surface condition C is obtained by skin passing. The controlled surface for the exposed side enables application of a uniform paint finish. The reverse surface has, at least, the characteristics of surface quality B.
Surface finish
Pure zinc
MA: minimised spangle, as coated surface (Z/GI).
MB: minimised spangle, improved surface (Z/GI).
MC: minimised spangle, best quality surface (Z/GI).
MagiZinc®
A : as coated surface (ZM).
B : improved surface (ZM).
C: best quality surface (ZM).
Surface roughness
Metallic coated steel (with the exception of galvanised steel with standard surface (MA) can be supplied in various grades of roughness – please contact us for more details. If no roughness is specified, roughness will be as shown in the table below.
Roughness Ra (µm) |
|
|---|---|
cut off 0.8mm | cut off 2.5mm |
| 0.6 - 1.9 | 0.7 - 2.2 |
Surface treatments
The surface treatments available are O, C and CO.
Oiling (O)
The material surface can be oiled with preservative oil. Other types of oil - for increasing strength or reducing weight – are available to help achieve your optimum performance parameters. Please contact us for details.
Tata Steel offers the following range of oiling levels:
| Coating type | Capability |
|---|---|
| Pure zinc (Z/GI) | 0.5 - 1.6 g/m2 |
| MagiZinc® (ZM) | 0.5 - 1.6 g/m2 |
Other oiling levels are available on request.
Chromium-free passivation (C)
This surface treatment temporarily protects the zinc-coated material against white rust during transportation and storage (not applicable to all qualities and dimensions – please contact us for details).
Chromium-free passivation and oiled (CO)
Please request this combination of surface treatments if you require extra protection against white rust formation (not applicable to all qualities and dimensions – please contact us for details).
T-treatment
Please contact us for further information.
Prime Lubrication Treatment (PLT)
Prime Lubrication Treatment facilitates the manufacturing of stamped components by minimising known issues in stamping and joining.
Currently Under development, please contact us regarding further information
Untreated (U)
Please contact us regarding the availability of untreated coils.
EN-Product-Metallic Coated-AHSS-CR DP800-Properties TSUK
Properties
Mechanical properties
The available grades have the following mechanical properties. These are measured longitudinal to the rolling direction.
Property range is indicated according to VDA 239-100, but properties meet equivalent EN 10346 specifications also.
| Grade | CR DP800 | |
|---|---|---|
| Yield strength Rp0,2 | N/mm2 | 440 - 550 |
| Min. BH2 | N/mm2 | 30 |
| Tensile strength Rm | N/mm2 | 780 - 900 |
| Elongation | % | 14 |
| Min. r-value | - | |
| Min. n-value | 0.11 |
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 | |
|---|---|---|
| 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 are in weight%.
EN_US-Product-Metallic Coated-AHSS-CR DP800-Dimensions TSUK
Dimensional capability
Galvanised (GI)
Dimensions in mm.
| Thickness | Max. width |
|---|---|
| From - up to | CR DP800 |
| 0.80 - 1.00 | 1339 |
| 1.00 - 1.70 | 1400 |
| 1.70 - 1.80 | 1350 |
| 1.80 - 2.00 | 1300 |
For widths below 900 mm, please contact us.
Galvannealed (ZF/GA) CR DP800 is produced in the Netherlands. For further information click here.
The tightest available thickness tolerances are according to the ‘Special’ tolerances of EN10143:2006.
Tolerances
Tolerances comply with standard EN 10143: 2006.
Tighter tolerances are available - please contact us for details.