DX56D-GI/GA/ZM
Specification details for DX56-GI/GA/ZM

EN-Automotive-Product-Metallic coated-Forming-All Grades OverviewTSE

Overview

Relationship with standards

Grade

VDA standard

VDA 239-100-16

European standard

EN 10346: 2015

DX51-GI/GA/ZM-DX51D+Z/+ZF/+ZM
DX52-GI/GA/ZMCR1-GI/GA/ZMDX52D+Z/+ZF/+ZM
DX53-GI/GA/ZMCR2-GI/GA/ZMDX53D+Z/+ZF/+ZM
DX54-GI/GA/ZMCR3-GI/GA/ZMDX54D+Z/+ZF/+ZM
DX56-GI/GA/ZMCR4-GI/GA/ZMDX56D+Z/+ZF/+ZM
DX57-GI/ZMCR5-GI/ZMDX57D+Z/+ZM
DX58-GI 1--
1. Not in standard. Tata Steel’s own specification.

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

Coatings and Surface aspects

Coatings

Three types of metallic coating are available:

  • Pure zinc. Galvanised steel (GI) is coated with an almost pure zinc coating (>99% zinc)
  • Zinc-iron alloy. Galvannealed steel (GA) is coated with a zinc coating containing approximately 8-12% iron. For further information on our galvannealed products please visit our Automotive catalogue.
     

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)

Coating weight measured in g/m2 double-sided (µm, per side). 

Surface condition

Surface condition complies with standard: EN 10346:2015. Galvanised grades are available in surface condition with minimised spangle MB. Galvannealed grades are available in surface condition B. For the highest surface quality requirements we also offer Serica FLO®. For more details please visit our Automotive catalogue.

Surface condition B: improved surface, suitable for unexposed parts

With this surface condition, 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 finish

Galvanised (GI) grades with surface condition MC are available with different levels of surface finish. For exposed body panels with stringent paint appearance requirements we offer ‘regular’ surface finish. For panels with the highest paint appearance requirements we recommend the premium surface finish Serica FLO®.

Surface roughness

Metallic coated steel for automotive applications can be supplied in various grades of roughness to comply with individual customer norms. If no roughness is specified, roughness will be as shown in the table below

Roughness Ra (µm)
cut off 0.8mmcut off 2.5mm
0.6 - 1.90.7 - 2.2

​​​Surface treatments

The surface treatments available are oiling (O), T-treatment and prime lubrication treatment (PLT).

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 typeOiling level
Pure zinc (GI)0.25 - 1.5 g/m2
Zinc-iron(GA)0.5 - 1.5 g/m2
MagiZinc Auto(ZM)0.25 - 1.5 g/m2

Other oiling levels are available on request.
 

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-Automotive-Product-Metallic coated-Forming-DX56D-PropertiesTSE

Properties

Properties


Mechanical properties

Metallic coated steel for forming has the following mechanical properties. These are measured transverse to the rolling direction.
Property range is indicated according to EN 10346, but properties meet equivalent VDA 239-100 specifications also.

 GradeDX56-GIDX56-GA/ZM
Yield strength1 ReN/mm²120 - 180120 - 180
Tensile strength RmN/mm²260 - 350260 - 350
Elongation2%3937
Min. r-value3 1.91.7
Min. n-value 0.210.20
1 If the yield point is not pronounced, the values apply to the 0.2% - proof strength Rp0.2 ; 
   if the yield strength is pronounced, the values apply to the lower yield point ReL.
2 Decreased minimum elongation values apply for product thickness t ≤ 0.50 mm (minus 4 units) and for 0.50 mm ≤ t ≤ 0.70 mm (minus 2 units).
   Elongation after fraction A uses test piece length L0 = 80 mm.
3  For t > 1.5 mm, the minimum r90 - value reduced by 0.2 applies.
   For t ≤ 0.7 mm, the minimum r90 - value reduced by 0.2 and minimum n90- value reduced by 0.01 apply.
 

Chemical composition

Tata Steel complies with the following cast analysis:

 GradeDX56
CMax.0.12
MnMax.0.60
PMax.0.10
SMax.0.045
TiMax.0.30
All values are in weight%.

EN-Automotive-Product-Metallic coated-Forming-DX56D-DimensionsTSE

Dimensions

Dimensional capability
 

Galvanised (GI) products

Dimensions in mm.

ThicknessMax. width
From - up toDX56
0.45 - 0.501350
0.50 - 0.551500
0.55 - 0.601620
0.60 - 0.651730
0.65 - 0.701870
0.70 - 1.201970
1.20 - 1.301940
1.30 - 1.601840
1.60 - 1.701800
1.70 - 1.801720
1.80 - 1.901630
1.90 - 2.001530
For widths below 1000 mm, please contact us.
 

Galvannealed (GA) products

Dimensions in mm.

ThicknessMax. width
From - up toDX56
0.50 - 0.601420
0.60 - 0.651700
0.65 - 1.451850
1.45 - 1.501800
1.50 - 1.601700
1.60 - 1.701600
1.70 - 1.751550
For widths below 1000 mm, please contact us.
 

MagiZinc® (ZM) products

Dimensions in mm.

ThicknessMax. width
From - up toDX56
0.45 - 0.501350
0.50 - 0.551500
0.55 - 0.601620
0.60 - 0.651730
0.65 - 0.701870
0.70 - 1.201970
1.20 - 1.301940
1.30 - 1.601840
1.60 - 1.701800
1.70 - 1.801720
1.80 - 1.901630
1.90 - 2.001530
For widths below 1000 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

 

EN-EngineeringAutomotive-Product-Metallic coated-All grades Further processingTSE

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.