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_US-Product-Metallic coated-All Grades Coatings Surface aspectsTSUK
Surface Aspects
Surface quality
Surface quality complies with ASTM standards A653: 2022 and A924: 2022. The products can be delivered with the following coating/surface types:
Minimized spangle (standard 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.
Minimized spangle temper rolled (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.
Extra smooth (best surface, exposed)
Surface quality is obtained by skin passing. The controlled surface shall make it possible to apply a uniform high-class paint finish. The other surface shall at least have the characteristics of surface quality B. As a rule, the upper side of the strip is inspected; on request the strip can be turned over so that the underside is the inspected side.
MagiZinc® is currently only available with standard or improved surface qualities.
Surface roughness
Metallic coated steel will normally be supplied with a regular matte finish:
| Description | Roughness µinch CLA |
|---|---|
| regular matte | 30 - 61 |
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 may be available to meet your requirement – please contact us.
Tata Steel offers the following range of oiling levels for all coating types:
Lightly oiled: 65 mg/ft2 per side
Regular oiled: 100 mg/ft2 per side
Other oiling levels are available on request. If no amount is indicated in your specification, a regular amount of oil will be applied.
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 – please consult us).
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 – please consult us).
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.
EN_US-Product-Metallic coated-All grades Shape and dimensional tolerancesTSUK
Shape and dimensional tolerances
Tolerances on thickness
The thickness tolerances comply with standard ASTM A924: 2022 – 1 inch minimum edge distance.
Thickness tolerances over, no tolerance under. Dimensions in inches:
| Specified thickness | Normal tolerances for a specified width of | |||
|---|---|---|---|---|
| From - up to | 0 - 32 | 32 - 40 | 40 - 60 | 60 - 75 |
| 0.000 - 0.023 | 0.003 | 0.003 | 0.003 | 0.003 |
| 0.023 - 0.043 | 0.004 | 0.004 | 0.004 | 0.004 |
| 0.043 - 0.061 | 0.005 | 0.005 | 0.005 | 0.005 |
| 0.061 - 0.075 | 0.006 | 0.006 | 0.006 | 0.006 |
| 0.075 - 0.101 | 0.007 | 0.008 | 0.0108 | 0.009 |
| 0.101 - 0.187 | 0.012 | 0.012 | 0.014 | 0.014 |
Around cold-rolled welds an increase of 20 % at the most over the thickness tolerance is allowed over a length of 50 ft.
Thickness tolerance availability is shown below:
| Thickness tolerance | Availability |
|---|---|
| Full thickness tolerance | Available |
| Special thickness tolerance | Refer before ordering |
| 50% of full thickness tolerance | Refer before ordering |
Tolerances on width
The tolerances for width comply with standard ASTM A924: 2022.
Thickness tolerances over, no tolerance under. Dimensions in inches:
| Specified width | Tolerances for a specified width of | |
|---|---|---|
| From - up to | Mill edge | Cut edge |
| 30 - 48 | 0.71 | 0.187 |
| 48 - 60 | 0.71 | 0.25 |
| 60 - 75 | 0.71 | 0.312 |
MagiZinc® is not included in the standard. Tighter tolerances are available on request.
Dimensions and coil weights
| Description | Capabilities |
|---|---|
| Inside diameter | standard 24 inches, 20 inches on request |
| Outside diameter | maximum 98 inches and at the most |
| 10/7 x width | |
| Coil weight | maximum 66,000 lbs. |
Coating layer
| Coating layer | Coating weight total both sides |
|---|---|
| oz/ft2 | |
| G40 | 0.4 |
| G60 | 0.6 |
| G90 | 0.9 |
Other coating weights are available. Please contact us to discuss your requirements.