CR HSLA300-GI/GA/ZM
Specification details for CR HSLA300

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

Overview

Relationship with standards

  VDA standard European standard
Grade VDA 239-100 EN 10346: 2015
Phosphorus alloyed interstitial-free
CR IF220-GI/GA/ZM CR210IF-GI/GA/ZM HX220YD+Z/+ZF/+ZM
CR IF260-GI/GA/ZM CR240IF-GI/GA/ZM HX260YD+Z/+ZF/+ZM
Bake-hardening
CR BH180-GI/GA/ZM CR180BH-GI/GA/ZM HX180BD+Z/+ZF/+ZM
CR BH220-GI/GA/ZM CR210BH-GI/GA/ZM HX220BD+Z/+ZF/+ZM
CR BH260-GI/GA/ZM CR240BH-GI/GA/ZM HX260BD+Z/+ZF/+ZM
CR BH300-GI/GA/ZM CR270BH-GI/GA/ZM HX300BD+Z/+ZF/+ZM
Phosphorus alloyed
CR P220-GI - HX220PD+Z 1
CR P260-GI - HX260PD+Z 1
CR P300-GI - HX300PD+Z 1
Micro-alloyed
CR HSLA220-GI/GA/ZM CR210LA-GI/GA/ZM HX220LAD+Z/+ZF/+ZM 1
CR HSLA260-GI/GA/ZM CR240LA-GI/GA/ZM HX260LAD+Z/+ZF/+ZM
CR HSLA300-GI/GA/ZM CR270LA-GI/GA/ZM HX300LAD+Z/+ZF/+ZM
CR HSLA340-GI/GA/ZM CR300LA-GI/GA/ZM HX340LAD+Z/+ZF/+ZM
CR HSLA380-GI/GA/ZM CR340LA-GI/GA/ZM HX380LAD+Z/+ZF/+ZM
CR HSLA420-GI/ZM CR380LA-GI/ZM HX420LAD+Z/+ZM
CR HSLA460-GI/ZM CR420LA-GI/ZM -
CR HSLA500-GI/ZM CR460LA-GI/ZM -
1. Not in EN 10346:2015. 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
  • 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-HSS-CR HSLA300-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. Property range is indicated according to EN 10346, but properties meet equivalent VDA 239-100 specifications also.

Micro-alloyed steels
 GradeCR HSLA300
Coating type GI/GA/ZM
Yield strength ReLN/mm2300 - 380
Min. BH2N/mm2-
Tensile strength RmN/mm2380 - 480
Elongation%23
Min. r-value r90 -
Min. n-value n90 -
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.
For galvannealed grades (GA) 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
 GradeCR HSLA300-GI/GA/ZM
CMax.0.11
MnMax.1
PMax.0.03
SMax.0.025
SiMax.0.5
AltotMin.0.1
TiMax.0.15
NbMax.0.09
All values in weight%.

EN-Automotive-Product-Metallic Coated-HSS-CR HSLA300-Dimensions TSE

Dimensions

Dimensional capability

Galvanised (GI) products

Dimensions in mm.

Thickness Max. width
From - up to CR HSLA300
0.45 - 0.50 1460
0.50 - 0.55 1530
0.55 - 0.60 1640
0.60 - 0.65 1740
0.65 - 0.70 1760
0.70 - 0.75 1780
0.75 - 0.90 1800
0.90 - 1.00 1860
1.00 - 1.10 1890
1.10 - 1.20 1930
1.20 - 1.25 1970
1.25 - 1.40 1980
1.40 - 1.50 1930
1.50 - 1.60 1900
1.60 - 1.80 1740
1.80 - 1.90 1690
1.90 - 2.00 1590
For widths below 900 mm, please contact us.
 

MagiZinc (ZM) products

Dimensions in mm.

Thickness Max. width
From - up to CR HSLA300
0.40 - 0.45 1270
0.45 - 0.50 1460
0.50 - 0.55 1530
0.55 - 0.60 1640
0.60 - 0.65 1740
0.65 - 0.70 1760
0.70 - 0.75 1780
0.75 - 0.90 1800
0.90 - 1.00 1860
1.00 - 1.10 1890
1.10 - 1.30 1900
1.30 - 1.40 1800
1.40 - 1.80 1700
1.80 - 1.90 1690
1.90 - 2.00 1590
For widths below 900 mm, please contact us.

 

Tolerances

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