CR DP600-GI/GA
Specification details for CR DP600

EN-Automotive-Product-Metallic coated-AHSS UHSS-All Grades OverviewTSE

Overview

Meeting design demands

Body-in-white design demands affordability and improved crash performance, combined with low weight. Our advanced high-strength steels (AHSS) and ultra high-strength steels (UHSS) help meet those demands and provide good formability.

Tata Steel supports customers in finding the optimum balance between cost, lightweight design potential and performance for specific applications. Total cost of ownership (TCO) concept studies identify and quantify the TCO reduction potential offered by Tata Steel’s advanced steel solutions like HyperForm® for specific automotive applications.

Applications

Applications for our advanced high-strength and ultra high-strength steels include:

  • automotive A-, B- and C-pillars
  • box girders for chassis
  • crash boxes
  • crossbeams and cross members
  • roofbows
  • door and sill reinforcements
  • support components

Relationship with standards

Tata Steel offers the following grades:

Grade VDA 239-100 EN 10346:2015
Dual-phase    
CR DP600-GI/GA CR330Y590T-DP-GI/GA HCT590X+Z/ZF
CR DP600-GI HyperForm® CR330Y590T-DH-GI 1 -
CR DP800-GI/GA CR440Y780T-DP-GI/GA HCT780X+Z/ZF
CR DP800-GI HyperForm® CR440Y780T-DH-GI -
CR DP1000LY-GI CR590Y980T-DP-GI HCT980X+Z
CR DP1000HY-GI CR700Y980T-DP-GI HCT980XG+Z

Please contact us for AHSS with MagiZinc® coating. 
1) VDA draft

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
  • MagiZinc Auto. MagiZinc Auto 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)70 (5 µm/side)200 (14 µm/side)

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

Surface condition

Surface condition complies with standard: EN 10346:2015. Galvanised steels are available in surface conditions with minimised spangle MB or MC. Galvannealed steels and MagiZinc Auto are available in surface conditions B or C.

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 condition C: best quality surface, suitable for exposed parts

Surface condition C is obtained by skin passing. The controlled surface for the exposed side enables application of a uniform paint finish. The reverse surface has, at least, the characteristics of surface quality B.

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 and T-treatment.

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-AHSS-CR DP600-Properties TSE

Properties

Properties


Mechanical properties

The available grades have the following mechanical properties. These are measured longitudinal to the rolling direction.
Property range is indicated according to VDA 239-100, but properties meet equivalent EN 10346 specifications also.

  Grade CR DP600
Coating type   GI/GA
Yield strength Rp0,2 N/mm2 330 - 430
Min. BH2 N/mm2 30
Tensile strength Rm N/mm2 590 - 700
Elongation % 20
Min. r-value   -
Min. n-value   0.14
For galvannealed grades (ZF) the minimum elongation before fracture is lowered by 2%.
Elongation after fracture A uses test piece length L0 = 80 mm.
 

Chemical composition

Tata Steel supplies the following cast analysis with maximum values in weight percentages:

  Grade CR DP600
C Max. 0.15
Mn Max. 2.50
P Max. 0.050
S Max. 0.010
Si Max. 0.80
Al Max. 1.50
Cr+Mo Max. 1.40
All values are in weight%.

EN-Automotive-Product-Metallic Coated-AHSS-CR DP600-Dimensions TSE

Dimensions

Dimensional capability
 

Galvanised (GI) products

Dimensions in mm.

Thickness Max. width
From - up to CR DP600
0.70 - 0.80 1600
0.80 - 0.90 1625
0.90 - 1.00 1650
1.00 - 1.10 1700
1.10 - 1.20 1710
1.20 - 1.30 1715
1.30 - 1.40 1720
1.40 - 1.50 1730
1.50 - 1.55 1735
1.55 - 1.60 1740
1.60 - 1.70 1700
1.70 - 1.80 1650
1.80 - 1.90 1560
1.90 - 2.00 1500
For widths below 900 mm, please contact us.
The tightest available thickness tolerances are according to the ‘Special’ tolerances of EN10143:2006.
 

Galvannealed (GA) products

Dimensions in mm.

Thickness Max. width
From - up to CR DP600
0.80 - 0.90 1300
0.90 - 1.00 1350
1.00 - 1.20 1450
1.20 - 1.40 1500
1.40 - 1.60 1550
1.60 - 1.80 1500
For widths below 900 mm, please contact us.
The tightest available thickness tolerances are according to the ‘Special’ tolerances of EN10143:2006.
 

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