Overview
Tata Steel offers a comprehensive range of cold-rolled steel comprising both continuously annealed and batch annealed products. It means we can tailor our offering to meet your precise requirements for formability, strength, surface finish or flatness. Coupled with consistent quality, our wide product choice provides opportunities for you to optimize your products and processes.
The main benefits of our cold-rolled steel include:
- end products of consistent and reliable quality
- lighter and stronger products
- repeatable, trouble-free processing
- maximized yield
- reduced waste and rework
Applications
- Automotive components
- Bathtubs
- Components for building and construction
- Domestic appliances
- Drums and boilers
- Electrical goods
- Electrolytic coating
- Feedstock for galvanising and coating
- Furniture
- Radiators
- Tubes and sections
Grades
This section of the catalog shows the grades of cold-rolled steel offered by Tata Steel. These include advanced high-strength steels, high-strength steels and grades for enameling and forming.
Specific material requirements should be stated in the order. Any parameters not specified in the order will be supplied according to the most appropriate values in the standard.
Please contact us to discuss specifications not shown in this section of the catalog.
Supply – product conditions
We supply cold-rolled steel in the following conditions:
- Annealed and skin passed
- Full hard (on request)
- Sheets, discs and slit wide coil (on request).
Tata Steel produces cold-rolled and annealed strip by either the continuously annealed (CA) or batch annealed (BA) processes.
Please contact us if you require any further information or visit our metric page for additional downloads.
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Cold-rolled product links
Surface aspects
Surface quality according to ASTM A1008: 2013 and ASTM A568: 2011
Surface quality class 1 (exposed):
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 unexposed.
Surface quality class 2 (unexposed):
Defects that do not influence the formability or the application of surface coatings are permitted. These are defects such as pores, minor scratches,
slight indentations, small grooves or slight discolouration.
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. All textures are available. Unless specified otherwise, Tata Steel will supply ‘Regular matte’.
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Description
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Roughness µinch CLA
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Commercial bright
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≤ 10
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H - dull
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≤ 16
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Light matte
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≤ 36
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Regular matte
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24 - 76
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Rough matte
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64 - 100
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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:
Lightly oiled: 55 mg/ft2 per side
Regular oiled: 110 mg/ft2 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 unoiled 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%.
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Shape and dimensional tolerances
Tolerances on thickness
The standard thickness tolerances comply with standard ASTM A568: 2011 - excluding 1 inch minimum edge distance. Thickness tolerances over, no tolerance under.
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Tolerance (ASTM A568: 2011)
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Full thickness tolerances
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Available
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Special thickness tolerances
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Refer before ordering
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Tolerances on width
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Tolerance (ASTM A568: 2011)
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Normal width tolerances
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Available
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Special width tolerances
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Refer before ordering
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Out-of-squareness
The out-of-square tolerance does not exceed 1/16 inch per 6 inch for all thicknesses and all designations, according to ASTM A568: 2011.
The deviation from the edge camber does not exceed 1/4 inch in any 8 ft. strip length.
Flatness (skin passed products)
The flatness tolerance fulfils the ASTM A568: 2011 standard. A narrower flatness tolerance is available on request.
Winding
For winding, there may be a maximum width gap of 1/8 inch between two consecutive windings. The total width stagger across the coil wall will not exceed 1/2 inch.
Dimensions and coil weights
Tata Steel can supply cold-rolled steel with the following minimum and maximum dimensions and coil weights.
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Description
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Capability
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Coil diameter inner
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24 inch
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(20 inch available on request)
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Coil diameter outer
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minimum 40 inch
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maximum 110 inch and 10/7 x width
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Coil weight
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66.000 lbs max
66.000 - 99.000 lbs max available after consultation
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Coil weight limited by maximum outer diameter
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Maximum weight allowed by road/rail transport
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Some products may have different coil weight ranges available
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Usually a minimum coil weight up to 85% of the
maximum coil weight can be requested.
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PIW:
width ≤ 47 inch
47 inch < width ≤ 67 inch
width > 67 inch
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812 - 1176 PIW
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812 - 1176 PIW
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578 PIW and 812 - 1176 PIW
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Minimum tonnage per order
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Refer to price list for order quantity details
Minimum order quantities may apply
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Coil welds
For batch annealed coils, in general, pickling line welds are included.
The number of permissible recoiling line welds is determined in consultation with the customer. If welds are permitted, Tata Steel is better able to implement the best coil weight. A recoiling line weld is marked with a single hole in the centre of the strip, close to the weld. On request the identifying hole can be left out. Coils with welds are available on continuously annealed products – please contact us.
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