Metallic coated

High-strength steel

Our range of metallic coated high-strength steels includes micro-alloyed, phosphorus-alloyed and bake-hardening grades

Available with various corrosion-resistant coatings, they are ideal for applications requiring strength without a weight penalty. MagiZinc® coatings optimise weight savings.
For metallic coated high-strength steel products for automotive components including phosphorus alloyed interstitial-free grades, bake-hardening grades and phosphorus alloyed grades, please visit the Automotive HSS page

Metallic coated cold formed section containing a MagiZinc coating
tata-steel-distribution-halmstad-8891_39L
Machinery in the metallic coated blanking line
Product specification
High-strength steel is currently available in the following grades

EN-Engineering-Product-Metallic coated-HSS-HX220LAD+Z/+ZF/+ZM TSE

HX220LAD+Z/+ZF/+ZM
Specification details for HX220LAD+Z/+ZF/+ZM

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

Overview

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.

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 and surface aspects

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.
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-HX220LAD-Properties TSE

Properties

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
Not in EN 10346:2015  Grade HX220LAD+Z/+ZF/+ZM
Yield strength ReL N/mm2 220 - 300
Min. BH2 N/mm2 -
Tensile strength Rm N/mm2 320 - 400
Elongation % 29
Min. r-value -
Min. n-value -
Not in EN 10346:2015. Tata Steel’s own specification.
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.
For galvannealed grades (ZF) the minimum elongation before fracture is lowered by 2%.
For galvannealed grades (ZF) the minimum r90-value is lowered by 0.2.
 

Chemical composition

Tata Steel supplies the following cast analysis with maximum values unless otherwise shown:

Micro-alloyed steels
Not in
EN 10346:2015
Grade HX220LAD+Z/+ZF/+ZM
C Max. 0.10
Mn Max. 0.60
Si Max. 0.50
P Max. 0.03
S Max. 0.025
Altot Min. 0.015
Ti Max. -
Nb Max. -
Not in EN 10346:2015. Tata Steel’s own specification.
All values are in weight%.

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Dimensions

Dimensional capability
 

Galvanised (+Z) products

Dimensions in mm.

Thickness Max. width
From - up to HX220LAD
0.40 - 0.55 1520
0.55 - 0.60 1580
0.60 - 0.65 1720
0.65 - 0.70 1780
0.70 - 0.75 1800
0.75 - 0.90 1830
0.90 - 1.00 1870
1.00 - 1.10 1930
1.10 - 1.20 1970
1.20 - 1.80 2010
1.80 - 2.00 1920
2.00 - 2.20 1550
2.20 - 3.50 1540
3.50 - 3.60 1450
3.60 - 3.70 1430
3.70 - 3.85 1400
3.85 - 4.00 1350
For widths below 900 mm, please contact us.
For thicknesses over 2.50 mm, the minimum width is 1000 mm.
 

Galvannealed (+ZF) products

For the dimensions of galvannealed (GA) high-strength grades, please contact us.
 

MagiZinc® (+ZM) products

Dimensions in mm.

Thickness Max. width
From - up to HX220LAD
0.40 - 0.55 1520
0.55 - 2.00 1550
For widths below 900 mm, please contact us.
For thicknesses between 2.00 and 2.50 mm, please contact us.

 

Tolerances

Tolerances comply with standard EN 10143: 2006.
Tighter tolerances are available - please contact us for details.

EN-EngineeringAutomotive-Product-Metallic Coated-All Grades Shape and Dimensional TolerancesTSE

Shape and dimensional tolerances

Tolerances on thickness

The tolerances comply with standard EN 10143: 2006.
Tighter tolerances are available on request.
Thickness tolerance availability is shown below:

Thickness tolerance

Availability

Full thickness tolerance

Available

Special thickness tolerance

Available

50% of full thickness tolerance

Refer before ordering

 

The following tolerances apply to the grades with a minimum value for the yield strength lower than 260N/mm².

Nominal
thickness

Normal tolerances for a nominal width of 1 2

Special tolerances (S) for a
nominal width of 1 2

 

≤ 1200

> 1200

> 1500

≤ 1200

> 1200

> 1500

 

≤ 1500

 

 

≤ 1500

 

> 0.40

≤ 0.60

± 0.04

± 0.05

± 0.06

± 0.035

± 0.040

± 0.045

> 0.60

≤ 0.80

± 0.05

± 0.06

± 0.07

± 0.040

± 0.045

± 0.050

> 0.80

≤ 1.00

± 0.06

± 0.07

± 0.08

± 0.045

± 0.050

± 0.060

> 1.00

≤ 1.20

± 0.07

± 0.08

± 0.09

± 0.050

± 0.060

± 0.070

> 1.20

≤ 1.60

± 0.10

± 0.11

± 0.12

± 0.060

± 0.070

± 0.080

> 1.60

≤ 2.00

± 0.12

± 0.13

± 0.14

± 0.070

± 0.080

± 0.090

> 2.00

≤ 2.50

± 0.14

± 0.15

± 0.16