S320GD+Z/+ZM
Specification details for S320GD+Z/+ZM

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

CoatingMinimumMaximum
Pure zinc (Z)90 (6 µm/side)600 (42 µm/side)
Zinc-iron (ZF)90 (6 µm/side)140 (10 µm/side)
MagiZinc (ZM)170 (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

Surface condition C 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.

 

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 - 1.90.7 - 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 typeCapability
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.

T-treatment
Please contact us for further information.

Prime Lubrication Treatment (PLT)
Prime Lubrication Treatment facilitates the manufacturing of stamped components by minimising known issues in stamping and joining.

For further information please visit our Prime Lubrication Treatment (PLT) page.

EN-Engineering-Product-Metallic Coated-Structural steel-S320GD-Properties TSE

Properties

Properties


Mechanical properties

Metallic coated structural steel grades have the following mechanical properties (skin-passed) - these are measured longitudinal to the rolling direction:

EN 10346: 2015 Grade S320GD+Z/+ZM
Min. yield strength Rp0.2 N/mm² 320
Min. tensile strength Rm N/mm² 390
Elongation % 17
If the yield point is pronounced, the values apply to the upper yield point ReH.
A range of 140 N/mm² can be expected for tensile strength.
Elongation after fracture uses test piece length L0 = 80 mm.
For a thickness t ≤ 0.7 mm the minimum elongation after fracture is decreased by 2% and for a thickness t ≤ 0.5mm the minimum elongation after fracture is decreased by 4%.
 

Chemical composition

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

EN 10346: 2015 Grade S320GD+Z/+ZM
C Max. 0.20
Mn Max. 1.70
P Max. 0.10
S Max. 0.045
Si Max. 0.60
All values in weight%.

EN-Engineering-Product-Metallic Coated-Structural steel-S320GD-Dimensions TSE

Dimensions

Dimensional capability
 

Galvanised (+Z) products

Dimensions in mm.

Thickness Max. width
From - up to S320GD
0.40 - 0.45 1350
0.45 - 0.50 1370
0.50 - 0.60 1420
0.60 - 0.75 1520
0.75 - 1.00 1620
1.00 - 1.60 1620
1.60 - 2.20 1520
2.20 - 3.50 1540
3.50 - 3.60 1500
3.60 - 3.70 1450
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.
 

MagiZinc® (+ZM) products

Dimensions in mm.

Thickness Max. Width
From - up to S320GD
0.40 - 0.45 1350
0.45 - 0.50 1370
0.50 - 0.60 1420
0.60 - 0.75 1520
0.75 - 0.90 1550
0.90 - 1.60 1550
1.60 - 2.00 1520
For widths below 900 mm and 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 toleranceAvailable
Special thickness toleranceAvailable
50% of full thickness toleranceRefer before ordering

 

The following tolerances apply to the grades with a minimum value for the
yield strength lower than 260 N/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± 0.090± 0.100± 0.110
> 2.50≤ 3.00± 0.17± 0.17± 0.18± 0.110± 0.120± 0.130
> 3.00≤ 5.00± 0.20± 0.20± 0.21± 0.15± 0.16± 0.17
> 5.00≤ 6.50± 0.22± 0.22± 0.23± 0.17± 0.18± 0.19
1. Around cold-rolled welds an increase of 20% at the most over the thickness tolerance is allowed
   over a length of 15 metres.
2. For zinc coatings ≥ Z450 the tolerance on the thickness must be raised by 0.02 mm.

 

The following tolerances apply to the steel grades with a minimum value for the 
yield strength 260 N/mm² ≤ Rp0.2 < 360 N/mm² and for grades DX51D and S550GD.

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

 

≥ 0.35≤ 0.40± 0.05± 0.06-± 0.035± 0.040-
> 0.40≤ 0.60± 0.05± 0.06± 0.07± 0.040± 0.045± 0.050
> 0.60≤ 0.80± 0.06± 0.07± 0.08± 0.045± 0.050± 0.060
> 0.80≤ 1.00± 0.07± 0.08± 0.09± 0.050± 0.060± 0.070
> 1.00≤ 1.20± 0.08± 0.09± 0.11± 0.060± 0.070± 0.080
> 1.20≤ 1.60± 0.11± 0.13± 0.14± 0.070± 0.080± 0.090
> 1.60≤ 2.00± 0.14± 0.15± 0.16± 0.080± 0.090± 0.110
> 2.00≤ 2.50± 0.16± 0.17± 0.18± 0.110± 0.120± 0.130
> 2.50≤ 3.00± 0.19± 0.20± 0.20± 0.130± 0.140± 0.150
> 3.00≤ 5.00± 0.22± 0.24± 0.25± 0.17± 0.18± 0.19
> 5.00≤ 6.50± 0.24± 0.25± 0.26± 0.19± 0.20± 0.21
1. Around cold-rolled welds an increase of 20% at the most over the thickness tolerance is allowed
   over a length of 15 metres.
2. For zinc coatings ≥ Z450 the tolerance on the thickness must be raised by 0.02mm

 

The following tolerances apply to the steel grades with a minimum value for the 
yield strength 360 N/mm² ≤ Rp0.2 ≤ 420 N/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

 

≥ 0.35≤ 0.40± 0.05± 0.06-± 0.040± 0.045-
> 0.40≤ 0.60± 0.06± 0.07± 0.08± 0.045± 0.050± 0.060
> 0.60≤ 0.80± 0.07± 0.08± 0.09± 0.050± 0.060± 0.070
> 0.80≤ 1.00± 0.08± 0.09± 0.11± 0.060± 0.070± 0.080
> 1.00≤ 1.20± 0.10± 0.11± 0.12± 0.070± 0.080± 0.090
> 1.20≤ 1.60± 0.13± 0.14± 0.16± 0.080± 0.090± 0.110
> 1.60≤ 2.00± 0.16± 0.17± 0.19± 0.090± 0.110± 0.120
> 2.00≤ 2.50± 0.18± 0.20± 0.21± 0.120± 0.130± 0.140
> 2.50≤ 3.00± 0.22± 0.22± 0.23± 0.140± 0.150± 0.160
> 3.00≤ 5.00± 0.22± 0.24± 0.25± 0.17± 0.18± 0.19
> 5.00≤ 6.50± 0.24± 0.25± 0.26± 0.19± 0.20± 0.21
1. Around cold-rolled welds an increase of 20% at the most over the thickness tolerance is allowed
   over a length of 15 metres.
2. For zinc coatings ≥ Z450 the tolerance on the thickness must be raised by 0.02mm.

 

The following tolerances apply to the steel grades with a minimum value for the 
yield strength 420 N/mm² < Rp0.2 ≤ 900 N/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

 

≥ 0.35≤ 0.40± 0.06± 0.07-± 0.045± 0.050-
> 0.40≤ 0.60± 0.06± 0.08± 0.09± 0.050± 0.060± 0.070
> 0.60≤ 0.80± 0.07± 0.09± 0.11± 0.060± 0.070± 0.080
> 0.80≤ 1.00± 0.09± 0.11± 0.12± 0.070± 0.080± 0.090
> 1.00≤ 1.20± 0.11± 0.13± 0.14± 0.080± 0.090± 0.110
> 1.20≤ 1.60± 0.15± 0.16± 0.18± 0.090± 0.110± 0.120
> 1.60≤ 2.00± 0.18± 0.19± 0.21± 0.110± 0.120± 0.140
> 2.00≤ 2.50± 0.21± 0.22± 0.24± 0.140± 0.150± 0.170
> 2.50≤ 3.00± 0.24± 0.25± 0.26± 0.170± 0.180± 0.190
> 3.00≤ 5.00± 0.26± 0.27± 0.28± 0.23± 0.24± 0.26
> 5.00≤ 6.50± 0.28± 0.29± 0.30± 0.25± 0.26± 0.28
1. Around cold-rolled welds an increase of 20% at the most over the thickness tolerance is allowed
   over a length of 15 metres.
2. For zinc coatings ≥ Z450 the tolerance on the thickness must be raised by 0.02mm.
 

Tolerances on width

The tolerances on width comply with standard EN 10143: 2006
MagiZinc is not included in the standard, but fulfils EN 10143: 2006 requirements.
Tighter tolerances are available on request.

Tolerances in mm.

Nominal width wNormal tolerancesSpecial tolerances (S)
600 ≤ w ≤ 12005
0
2
0
1200 < w ≤ 15006
0
2
0
1500 < w ≤ 18007
0
3
0
w > 18008
0
3
0

 

Dimensions and coil weights

DescriptionAvailability
Coil diameter inner610 mm
(508 mm available on request)
Coil diameter outer10/7 x width max
1000 mm min.
2500 mm max.
Coil weight30t max.
33t max. available after consultation
Coil weight limited by maximum outer diameter
Maximum weight allowed by road/rail transport
Some products may have different coil weight ranges available
Usually a minimum coil weight up to 85% of the maximum coil weight can be requested
KIM: width ≤ 1200 mm11.7 - 22.7 kg/mm width
KIM: 1200mm < width ≤ 1700 mm11.6 - 21.7 kg/mm width
KIM: width > 1700 mm11.0 kg/mm width and 11.6 - 21.7 kg/mm width
Minimum tonnage per orderRefer to price list for order quantity details
Minimum order quantities may apply

 

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Further processing

Further processing

We have a broad network of Tata Steel service centres across Europe, offering decoiling and slitting services from stock and against short lead times

Light gauge processing

Processing type Slitting Decoiling Blanking
Thickness range (mm) 0.2 - 7.0 0.3 - 6.0 0.3 - 6.0
Width range (mm) 10 - 2050 50 - 2600 200 - 2600
Length range - up to 6 m up to 6 m
Locations Netherlands
Germany
France
Spain
Sweden
Norway
Finland
Netherlands
Germany
France
Spain
Sweden
Norway
Finland
Netherlands

For further information please visit our Service Centre webpages.