Specification details for HX500LAD+Z

EN-Engineering-Product-Metallic coated-HSS-All Grades OverviewTSE


Relationship with standards

European standard


EN 10346:2015


Phosphorus alloyed interstitial-free

For phosphorus alloyed 
interstitial-free grades,
bake-hardening grades
and phosphorus alloyed grades,
please visit the Automotive HSS page.








Phosphorus alloyed

HX220PD+Z 1

HX260PD+Z 1

HX300PD+Z 1











HX220LAD+Z/+ZF/+ZM 1








1. Not in EN 10346:2015. Tata Steel’s own specification.

EN-Engineering-Product-Metallic coated-All Grades Coatings Surface aspectsTSE

Coatings and surface aspects


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 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.
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).


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


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-HX500LAD-Properties TSN



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 HX500LAD+Z
Yield strength ReL N/mm2 500 - 620
Min. BH2 N/mm2 -
Tensile strength Rm N/mm2 530 - 690
Elongation % 13
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 HX500LAD+Z
C Max. 0.15
Mn Max. 1.70
P Max. 0.03
S Max. 0.025
Si Max. 0.50
Altot Min. 0.015
Ti Max. 0.15
Nb Max. 0.09