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RSP : Cold Rolled Coils and Sheets

Rationalised sizes of CR Coils

Thickness 
mm
Width
mm
0.35, 0.4, 0.5 900/ 920
0.63, 0.8 900/ 920, 1000/ 1020
1.0,1.25, 1.6, 1.85 900/920, 1000/ 1020, 1100/1120, 1250/ 1270

Note: Some quantity may be available in mixed thickness of
0.3 - 0.5 mm and mixed widths of 750-1000 mm
Coil weight: 5 to 13 tonnes for width above 1100mm and
3 to 10 tonnes up to 1100 mm width.
Coil Internal Diameter - 610 mm from CR-1 route and
 
510 mm from Tandem Mill route.
Common Grades : IS 513 Grades O, D
Tolerance
as per IS - 513/ 1994.

Rationalised sizes of Cold Rolled Sheets 

Thickness 
mm
Width 
mm
Length 
mm
0.5 900 2500
0.63, 0.8 900, 1000 2500
1.0, 1.25, 1.6 900, 1000, 1100, 1250 2500

Common Grades: IS 513/ 1994, Grades O, D

For Specifications click here

Packaging: CR Coils
Coils are first packed with paper and high-density polythene and then secured with steel strapping. A coil is strapped with three eye and two circumferential straps. For identification, one sticker and one metallic tag with a sticker are provided. These are then loaded into wagons with the eye of the coil in horizontal position. Straps again unitise them.

Packaging: CR Sheets
These are packed in packets of 3 - 10 tonnes each and covered with high density polythene and paper. Thereafter, these are bound with steel straps. They also have stickers inside the packets and metal tags attached to the strips.

Tolerances as per IS 513/ 1994
Tolerance on Thickness of Sheets

   Tolerance on Thickness for different widths
Nominal thickness 
mm
Up to 1250 mm Above 1250 
Up to 1600 mm
Above 1600 mm
Up to 0.25 ± 0.03      
Above 0.25 up to 0.40 ± 0.04      
Above 0.40 up to 0.60 ± 0.05 ± 0.06   
Above 0.60 up to 0.80 ± 0.06 ± 0.07 ± 0.08
Above 0.80 up to 1.00 ± 0.08 ± 0.09 ± 0.10
Above 1.00 up to 1.25 ± 0.09 ± 0.10 ± 0.12
Above 1.25 up to 1.60 ± 0.11 ± 0.12 ± 0.14
Above 1.60 up to 2.00 ± 0.12 ± 0.14 ± 0.16

Tolerance on Width of Sheets

Width of Sheets Tolerance
Up to 1250 mm + 7, - 0
Above 1250 mm + 10, - 0

Tolerance on Length of Sheets

Length of Sheets Tolerance
Up to 2000 mm + 15, -0Z
Above 2000 mm + 0.75% of length, - 0

Applications

Specification Size Applications
IS 513 O / D (K) Bitumen and Barrel sizes Packaging
IS 513 D/ DD/ EDD All sizes Automobile
IS 513 O / D (K) 0.8 to 2 mm thickness Precision tubes
IS 513 O/ D with Cu 0.63 to 2 mm thickness Corrosion resistance applications
IS 513 O, D 0.8 to 2 mm Household appliances

 
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