Steel for forming
Our cold-rolled forming steels are available in a wide range of grades and corrosion-resistant coatings. Each grade is designed for specific applications and comes with a choice of surface quality. Extensive dimensional choice provides opportunities for cutting waste and maximising yield.
MagiZinc® improves corrosion resistance with half the thickness of conventional zinc coatings, increasing yield, reducing cost and facilitating stronger, lighter products. It offers improved automotive corrosion protection and higher process efficiency.
Applications
- Automotive components
- Building components
- Domestic appliances
- Electrical goods
- Tubes and sections
EN-Engineering-Product-Metallic coated-Forming-DX51D+Z/+ZF/+ZM TSE
EN-Engineering-Product-Metallic coated-Forming-All Grades OverviewTSE
Overview
With MagiZinc® you can manufacture lighter products with higher strength thanks to the improved corrosion protection and at the same time increase the production volume and further reduce costs thanks to the better processing properties.
Relationship with standards
Metallic coated steel for forming complies with the following European standard
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EN 10346: 2015 |
|---|
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DX51D+Z/+ZF/+ZM |
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DX52D+Z/+ZF/+ZM |
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DX53D+Z/+ZF/+ZM |
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DX54D+Z/+ZF/+ZM |
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DX56D+Z/+ZF/+ZM |
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DX57D+Z/+ZM |
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DX58D+Z 1 |
1. Not in standard. Tata Steel’s own specification.
EN-Engineering-Product-Metallic coated-All Grades Coatings Surface aspectsTSE
Coatings
Three types of metallic coating are available:
Pure zinc
Galvanised steel (+Z) is coated with an almost pure zinc coating (>99% zinc).
Zinc-iron alloy
Galvannealed steel (+ZF) is coated with a zinc coating containing approximately 8-12% iron.
For further information on our galvannealed products please visit our Automotive catalogue.
MagiZinc
MagiZinc steel (+ZM) is coated with a zinc coating containing additional magnesium and aluminium.
Coating weight
| Coating | Minimum | Maximum |
|---|---|---|
| Pure zinc (Z) | 90 (6 µm/side) | 600 (42 µm/side) |
| Zinc-iron (ZF) | 90 (6 µm/side) | 140 (10 µm/side) |
| MagiZinc (ZM)1 | 70 (5 µm/side) | 310 (22 µm/side) |
Coating weight measured in g/m2 double-sided (µm, per side).
Coils with coatings > 450 g/m2 will be supplied in oscillated coiled condition.
Coils coated with 600 g/m2 are only available in width range 980 to 1300 mm.
1 For MagiZinc (ZM) coating weights below 100 g/m2 please visit our Automotive catalogue.
Surface quality
Surface quality complies with standard: EN 10346:2015. Galvanised steels are available in surface quality A, B or C.
For the highest surface quality requirements we also offer Serica FLO®. For more details please visit our Automotive catalogue.
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
For more information on surface quality C please visit our Automotive catalogue.
Surface finish
Pure zinc
MA: minimised spangle, as coated surface (Z).
MB: minimised spangle, improved surface (Z).
MC: minimised spangle, best quality surface (Z).
Zinc-iron alloy
A: as coated surface (ZF).
B: improved surface (ZF).
C: best quality surface (ZF).
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.
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Roughness Ra (µm) |
|
|---|---|
|
cut off 0.8mm |
cut off 2.5mm |
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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) |
0.25 - 1.5 g/m2 |
|
Zinc-iron (ZF) |
0.5 - 1.5 g/m2 |
|
MagiZinc® (ZM) |
0.25 - 1.5 g/m2 |