Cold Rolled Coils  
 

Cold Rolling Complex

Avon Ispat & Power Limited (Steel Strips Div.) located on the main G.T. Road at Ludhiana, manufactures cold rolled coils by using most modern & highly advanced equipments.

The cold rolling complex consists of three sophisticated cold rolling mills backed up with a HR slitter, continues pickling line, batch annealing furnaces, skin pass mill for better surface finish, CR slitter & an automated cut to length line. Brief description of the equipment installed at the complex are as under:

Continuous Pickling Line
After slitting the HR coils (the basic raw material), is passed through a Continuous Pickling Line (CPL) to remove the oxides / rust or scales from the strip surface, thereby enabling further reduction of thickness to the desired level in the Cold Rolling Mills.  

Batch Annealing Furnace
By annealing the cold rolled coils the desired properties in the finished coils are obtained by heating the material to a pre-determined temperature in a protected atmosphere and soaked for a specified time, before it is cooled to room temperature. This gives uniform properties throughout the coil and the desired microstructure of the finished product with a bright finish.

Skin Pass Mill
After the cold rolled coils are annealed, the strips are skin passed to improve the flatness and remove the superficial stresses over the strips. Anti-rust oil is sprayed on the strip surface for protection from rust.
Cold Rolled Coils Slitter
In order to obtain uniform width throughout the coil, the edges are trimmed in the CR slitter

Cut-to-Length Line
In Cut-To-Length Line (CTL), slitted coils are sheared to the desired length as per customer's requirement with very close tolerances.

End applications of Cold rolled coils / sheets

  • Precision Tubes
  • Bicycle / auto rims
  • Deep / Extra deep drawn auto components for auto sector
  • Material handling system
  • White goods sector
  • Furniture & office equipment

Various grades rolled along with their specifications and dimensional tolerances are detailed as under

 
Material Specifications
Chemical Composition (max)
Hardness (VPN)
UTS
EL %
Type C % Mn % S % P % Si % AI % Annealed QH HH FH MPa (GL-80)
IS 513 O 0.15 0.60 0.55 0.55 - - - - - - 130 Max 115-130 140-160 160-190 - - - - - -
IS 513 D 0.12 0.50 0.40 0.40 - - - 0.02- 115 Max - - - - - - - - - 280-420 23 Min
IS 513 DD 0.10 0.45 0.035 0.035 - - - 0.06 105 Max - - - - - - - - - 280-360 26 Min
IS 513 EDD 0.08 0.40 0.030 0.030 - - - 0.02-0.06 95 Max - - - - - - - - - 280-360 32 Min
If Grade 0.005 0.08 - - - - - - 0.02 0.02-0.06 95 Max - - - - - - - - - 280-360 42Min
IS 1079 ST-42 0.25 - - - 0.05 0.05 - - - 0.02-0.06 130-140 - - - - - - - - - 410-490 16Min
IS 7226 MC-11 (C-40) 0.35-0.45 0.60-0.90 0.04 0.04 0.15 0.35 - - - 140 Max - - - - - - 220-280 - - - - - -
IS 7226 MC-12(C-55) 0.50-0.60 0.50-0.65 0.04 0.04 0.15 0.35 - - - 160 Max - - - - - - 220-280 - - - - - -
IS 7226 C-62 0.57-0.67 0.50-0.80 0.04 0.04 0.15 0.35 - - - 170 Max - - - - - - 250-300 - - - - - -
IS 7226 HC-14(C-80) 0.75-0.80 0.50-0.80 0.04 0.04 0.10 0.35 - - - 180 Max - - - - - - 270-350 - - - - - -
HROP:- HROP  is available in all above grades .

 

Dimensional Tolerances
Dimensional Tolerances as per BIS or any other international standard or as per customer's specifications can be supplied however closer tolerances are supplied by M/s. Avon Ispat & Power Limited.
CR Strip
Flattened Roller & Bush wire
Offered By ACIL
Offered By ACIL
Thickness in mm
0.20 to 0.50
.02
Thickness in mm
0.50  to 1.15
.02
0.51 to 1.50
.03
1.51 to 4.50
.04
Width (Slitted) in mm
Up to 100
.10
Width in mm
2.20 to 5.80
5.81 to 9.00
.05 .10
100 to 200
.15
200 to 460
.20
Unslistted in mm
- 6 , - Nill
Length in mm
Upto 500
+ 2, - Nill
above 500
+ 3, - Nil
Camber 
Coils
2 per Mtr
Camber 
Coils
4 MM per Mtr


Size Range

CR Strips Flattened Roller & Bush Wire Surface - Bright / Rough / Matt / Edges -Slitted /Unslitted
Thickness in mm
CR-0.20 to 4.30 HROP up to 6.00
0.50 to 1.15
Surface - R.P Oiled / Dieseled / With out Oil Packing - Polythene / Hessian Cloth packing is available on special demand VCI paper is also available for Coils and CTL Sheets.
Width in mm
11 to 460
2.20 to 9.00
Coil ID in mm
400 and 500
400
Coil OD in mm
Up to 7 kg Per mm
650 Max
Length of CTL in mm
250 to 3000 
Coil Width 100 
 
 
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