HC260LA
Specification details for HC260LA

EN-Engineering-Product-Cold-rolled-HSS-All Grades OverviewTSE

Overview

Grades

Micro-alloyed grades

Micro-alloyed grades have high-strength levels through precipitation and grain refinement hardening. Careful use of alloying elements ensures high mechanical resistance and good weldability. There is limited scope for cold forming.

Tata Steel supplies high-strength micro-alloyed (HSLA) steel which complies with European standard EN 10268:2006+A1:2013.

Bake-hardening grades

Bake-hardening steel gains extra strength after going through an automotive paint oven. The benefit of this is a product with relatively good formability, combined with a higher strength final part.

Rephosphorised grades

These grades deliver high mechanical resistance and good suitability for cold forming due to solid solution hardening by phosphorus. Our rephosphorised grades are highly suited to the manufacture of car body panels and structural components because of their good resistance to impact and fatigue.

Carbon manganese grades                                                                             

Our carbon manganese product combines high strength with excellent formability for the most difficult cold-forming applications.

Applications

  • Automotive components
  • Construction components
  • Furniture
  • Precision tubes
  • Steel panel radiators

 

Relationship with standards

Tata Steel can supply the following cold-rolled high-strength steel grades:
 

Micro-alloyed grades

EN 10268:2006+A1:2013 (T) EN 10268:1998 (L)
Grade Grade
- -
HC260LA H240LA
HC300LA H280LA
HC340LA H320LA
HC380LA H360LA
HC420LA H400LA
HC460LA H460LA

 

Bake-hardening grades

EN 10268:2006+A1:2013 VDA 239-100
HC220B CR210BH

 

Rephosphorised grades

Grade SEW 094 Grade
HC220P ZSt E220P
HC260P ZSt E260P

 

Carbon manganese grades

Grade Grade
HC300CM No EN specified equivalent
The carbon manganese product is supplied to Tata Steel’s own standard. There is no direct EN standard equivalent.

EN-EngineeringAutomotive-Product-Cold-rolled-All Grades Surface aspectsTSE

Surface aspects

Surface quality

 

Surface quality A

Defects that do not influence the formability or the application of surface coatings are permitted. They are defects such as pores, minor scratches, slight indentations, small grooves or slight discolouration. 

Surface quality B

The better side must be free of defects that can spoil the uniform appearance of a high-quality paint or of an electrolytic coating. The other side must at least conform to surface quality A. Not all combinations of thickness and width are available in surface quality B. Please contact us for details. 

Inspected side

As a rule, the upper side of the strip is inspected; on request, the strip can be wound so that the inspected side is the underside.

 

Surface texture/roughness

Cold-rolled annealed and skin-passed steel is available in several surface textures. Unless specified otherwise, Tata Steel will supply normal roughness. The table below shows the range of surface textures according to EN 10130:2006.

 

 

Roughness Ra (µm)

EN 10130: 2006

Symbol

cut off 0.8 mm

extra-bright 1

-

≤ 0.3

bright

b

≤ 0.4

semi-bright

g

≤ 0.9

normal

m

0.6 - 1.9

rough

r

> 1.6

extra-rough 2

-

3.5 - 5

1. Not in EN 10130:2006 - Tata Steel’s own specification. Please contact us regarding the availability
2. Not in EN 10130:2006 - Tata Steel’s own specification, measured with a cut off of 2.5 mm
Other surface textures are available to meet your requirements - please contact us for details.

Preservative oil

The standard oil applied by Tata Steel acts as a protective coating. Other types of oil may be available to meet your requirement.
Tata Steel offers a range of oiling levels from 0.25 - 1.7 g/m2 per side.
Other oiling levels are available on request. Tata Steel is not responsible for the risk of corrosion during storage or shipment if material is ordered in the un-oiled condition.

Surface cleanliness

Tata Steel can guarantee improved surface cleanliness on request for batch-annealed products. The cleanliness is tested with a tape test, in which the loss of reflection is measured. The reflection gives an indication of the oil residue on the annealed product. Two levels of loss of reflectivity are available for batch annealed products: a maximum of 20% or a maximum of 30%. Continuously-annealed products typically exhibit a loss of reflection up to around 10%.

 

 

EN-Automotive-Product-Cold-rolled-HSS-HSLA260-Properties TSE

Properties

Properties


Mechanical properties

The available grades have the following mechanical properties - these are measured perpendicular to the rolling direction (transverse test pieces):
 

Micro-alloyed grades

EN 10268: 2006+A1:2013 Grade HSLA260
Yield strength Rp0,2 1 N/mm2 260 - 330
Tensile strength Rm N/mm2 350 - 430
Elongation 2 % 26
Min. r-value r90 3   -
Min. n-value n90   -
1. If the yield strength is pronounced (yield flag), the values apply to the lower yield point (ReL).
2. When thickness ≤ 0.7mm, the minimum value for elongation is reduced by 2%.
   Elongation after fracture A uses test piece length L0 = 80 mm.
3. For products with thickness > 2mm the minimum r90 is reduced by 0.2.
 

Chemical composition

Cold-rolled high-strength steels supplied by Tata Steel comply to the following cast analysis with maximum values unless otherwise shown:
 

Micro-alloyed grades

EN 10268:2006+A1:2013 Grade HSLA260
C Max. 0.10
Mn Max. 1.0
Si Max. 0.5
P Max. 0.030
S Max. 0.025
Al Min. 0.015
Ti 1 Max. 0.15
Nb 1 Max. 0.09
1. These additional elements may be used individually or in combination where they appear in the definition of the steel within the composition limits indicated. Vanadium and boron may also be added. However, the sum of the contents of these four dispersoidal elements shall not exceed 0.22%.
All values are in weight%.

EN-Engineering-Product-Cold-rolled-HSS-HC260LA-Dimensions TSE

Dimensions

Dimensional capability - Continuously annealed (CA)

Dimensions in mm.

Thickness Max. width
From - up to HC260LA
0.38 - 0.40 1390
0.40 - 0.43 1330
0.43 - 0.50 1390
0.50 - 0.55 1515
0.55 - 0.60 1515
0.60 - 0.70 1600
0.70 - 0.90 1710
0.90 - 1.20 1820
1.20 - 1.70 1750
1.70 - 1.80 1620
1.80 - 2.00 1500
Minimum width is 825 mm.
 

Dimensional capability – Batch annealed (BA)

Dimensions in mm.

Thickness Max. width
From - up to HC260LA
0.40 - 0.50 1590
0.50 - 0.55 1640
0.55 - 0.60 1670
0.60 - 0.65 1700
0.65 - 0.70 1730
0.70 - 0.80 1760
0.80 - 0.90 1810
0.90 - 1.00 1840
1.00 -