EN-Engineering-Product-Metallic coated-HSS-All Grades OverviewTSE
Relationship with standards
|
European standard |
|
|---|---|
|
EN 10346:2015 |
|
|
Phosphorus alloyed interstitial-free |
For phosphorus alloyed |
|
HX220YD+Z/+ZF/+ZM |
|
|
HX260YD+Z/+ZF/+ZM |
|
|
Bake-hardening |
|
|
HX180BD+Z/+ZF/+ZM |
|
|
HX220BD+Z/+ZF/+ZM |
|
|
HX260BD+Z/+ZF/+ZM |
|
|
HX300BD+Z/+ZF/+ZM |
|
|
Phosphorus alloyed |
|
|
HX220PD+Z 1 |
|
|
HX260PD+Z 1 |
|
|
HX300PD+Z 1 |
|
|
Micro-alloyed |
|
|
HX220LAD+Z/+ZF/+ZM 1 |
|
|
HX260LAD+Z/+ZF/+ZM |
|
|
HX300LAD+Z/+ZF/+ZM |
|
|
HX340LAD+Z/+ZF/+ZM |
|
|
HX380LAD+Z/+ZF/+ZM |
|
|
HX420LAD+Z/+ZM |
|
|
HX460LAD+Z/+ZM |
|
|
HX500LAD+Z/+ZM |
1. Not in EN 10346:2015. 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.
|
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) |
0.25 - 1.5 g/m2 |
|
Zinc-iron (ZF) |
0.5 - 1.5 g/m2 |
|
MagiZinc® (ZM) |
0.25 - 1.5 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).
Untreated (U)
Please contact us regarding the availability of untreated coils.
EN-Engineering-Product-Metallic Coated-HSS-HX420LAD-Properties TSE
Properties
Mechanical properties
Metallic coated high-strength steel grades have the following mechanical properties (skin-passed) - these are measured transverse to the rolling direction:
Micro-alloyed steels
| European standard EN 10346:2015 | Grade | HX420LAD+Z/+ZM |
|---|---|---|
| Yield strength ReL | N/mm2 | 420 - 520 |
| Min. BH2 | N/mm2 | - |
| Tensile strength Rm | N/mm2 | 470 - 590 |
| Elongation | % | 17 |
| Min. r-value | - | |
| Min. n-value | - | |
Lower yield strength or 0.2% proof stress applies.
BH2 refers to the increase of 0.2% proof stress after heating (bake hardening). Not applicable for hot rolled substrate.
Elongation after fracture A uses test piece length L0 = 80 mm.
Chemical composition
Tata Steel supplies the following cast analysis with maximum values unless otherwise shown:
Micro-alloyed steels
| EN 10346:2015 | Grade | HX420LAD+Z/+ZM |
|---|---|---|
| C | Max. | 0.11 |
| Mn | Max. | 1.40 |
| P | Max. | 0.03 |
| S | Max. | 0.025 |
| Si | Max. | 0.50 |
| Altot | Min. | 0.015 |
| Ti | Max. | 0.15 |
| Nb | Max. | 0.09 |
All values are in weight%.
EN-Engineering-Product-Metallic Coated-HSS-HX420LAD-Dimensions TSE
Dimensional capability
Galvanised (+Z) products
Dimensions in mm.
| Thickness | Max. width |
|---|---|
| From - up to | HX420LAD |
| 0.45 - 0.50 | 1240 |
| 0.50 - 0.55 | 1300 |
| 0.55 - 0.60 | 1360 |
| 0.60 - 0.65 | 1420 |
| 0.65 - 0.75 | 1540 |
| 0.75 - 0.90 | 1570 |
| 0.90 - 1.00 | 1620 |