Cold Rolled Steel (CR) Strips / Coils

CR Strips / Coils

On line stringent quality checks ensure the tolerances and dimension for sophisticated applications

CR production plant consists of two 4 HI and one 6 HI cold rolling mills along with bell furnaces, Skin Pass, Slitting, cut to length and testing facilities.

Products Range

  • CRCA strips with low carbon
  • Medium carbon steel
  • High strength low alloy steel
  • Semi processed unalloyed electrical
  • Hot rolled oiled & picketed steel
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Coils Specifications

Strip Width Strip Thickness Coil Weight
12mm to 1250mm 0.3mm to 3.2mm 2-17 Kg/mm width
Coils Diameter CR Strips Specifications
Internal 400mm & 500mm External 1700mm (max) Mild Steel in Drawing, Deep Drawing, Extra Deep Drawing Grades Medium and High carbon, SAE 1020, If Steel, High Tensile Steel ( SPC-370-440) IS 513, BS 1449, JIS G3141, DIN1623, IS 7226 and equivalent. SPCC, SPCD,SPCE
Cut to Length Sheets Surface Finish CR Surface Finish Bright / Polished Mat Finished
Length 350mm to 3000mm Width 40mm to 1250mm Thickness 0.40mm to 3.2mm Bright suitable for most purpose & recommended for electro plating with light Mat- Surface is suitable for deep drawing and for painting. Bright Finish, Dull finish, matt Finish Most of the applications are covered with this Surface roughness to have trouble free deep drawing and lacquering operations.

Customized Applications

Customized Cold Rolled Steel sheets and strips are used for the follows applications:-

  • A.C. & Refrigerator industry
  • Washing Machine
  • Electrical Parts
  • Automobile Industry
  • Steel Furniture Industry
  • Fabrication & Engineering

Cold Rolled Closed Anneled

International Standards

Grade Specifications
15513 JIS G3141 BS1449 DIN 1623 ASTM* EN 10130
Drawing Quality D SPCD CR3 St.12.13 CQ FEP03
Deep Drawing Quality DD SPCE CR2 St 14 DQ FEP03
Extra Deep Drawing Quality EDD SPCEN CR1 - EDDQ FEP04
High tensile grades available as per customers Specification on mutual agreement ASTM = A366/A366M /A619/ A619WA620/A620M
Designation Elongation%,
Min.Thickness range (mm)
Tensile Strength 		- Test Piece
- - 0.40 to 0.60
excl 		0.60 to1.0
excl		 1.0 to1.6excl -
SPCC (34) (36) (37) (38) No.5 in
SPCD (36) (38) (39) 40 Rolling
SPCE 18 40 41 42 Direction
  • 1. The tensile test value does not usually apply to SPCC
  • 2. For those less then 0.60mm in thickness the tens on test shall generally be omitted
Designation Erichsen Values for Thickness (mm)
- 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.2 1.4 1.6
SPCC 7.2 7.8 8.4 8.8 9.1 9.4 9.6 10.0 10.3 10.5
SPCD 7.6 8.2 8.8 9.2 9.5 9.8 10.0 10.4 10.7 10.9
SPCE 8.0 8.6 9.2 9.6 9.9 10.2 10.4 10.8 11.1 11.3

Shall apply to the average of the values of 3 pieces.

Thickness
Tolerance 		Width under
600 		630 to 1,000
excl. 		1,000 to 1,250
excl 		1,250 to 1,600
excl.		 1,600 to and
over
Thickness
         
0.30 to 0.40 excl.
± 0.04 ± 0.04 ± 0.04 - -
0.40 to 0.60 excl.
± 0.05 ± 0.05 ± 0.05 ± 0.06 -
0.60 to 0.80 excl.
± 0.06 ± 0.06 ± 0.06 ± 0.07 ± 0.08
0.80 to 1.00 excl.
± 0.07 ± 0.07 ± 0.08 ± 0.09 ± 0.10
1.00 to 1.25 exc l.
 ± 0.08 ± 0.08 ± 0.09 ± 0.10 ± 0.12
1.25 to 1.60 excl.
± 0.09 ± 0.10 ± 0.11 ± 0.12 ± 0.14
1.60 to 2.00 excl.
± 0.10 ± 0.11 ± 0.12 ± 0.14 ± 0.16

BS 1449 Part 1 Carbon Steel Plates, Sheet & Strip

Chemical composition Grade Chemical Composition, % Max. Classification
- C Mn P S -
CR 4 0.12 0.60 0.050 0.050 Drawing Quality
CR 3 0.10 0.50 0.040 0.040 Deep Drawing Quality
CR 2 0.08 0.45 0.030 0.035 Extra Deep Drawing Quality
CR 1 0.08 0.45 0.025 0.030 -

Mechanical Properties

Grade Yield Strength Tensile Strength Original Gauge Length Lo Bend mandrel Diameter
  N/mm²min. N/mm²min 50 mm 80mm 200mm 180º bend)
CR4 (140) (280) - - - CONTACT
CR 3 (140) (280) (34) (32) (25) CONTACT
CR 2 140 280 36 (34) 27 CONTACT
CR 1 140 280 38 (36) 29 CONTACT
  • 1. Tensile Properties given in brackets are for guidance only and are not mandatory unless specially agreed at the time of ordering. Tensile test result is not normally requested for grade CR 3 and
  • 2. For material less then 1.00 mm thick, the percentage elongation is reduced by 1 for each 0.25mm reduction in thickness.
  • 3 In case of this specification the agreement between the manufacturer and the customer is prior to ordering .
  • 4. *t- thickness of material

DIN 1623 Part 1 Cold Rolled Sheet and Strips for Cold Forming

  Chemical Composition, % Max. Mechanical Properties   Hardness, Max .
Steel* Grade % C %P %S Tensile Strength N/MM² Yield Strength N/MM², max Elongation %, min HRB HR30T
St12 0.10 - - 270~410 280 28 65 60
St13 0.10 - - 270~370 240 34 55 53
St14 0.08 - - 270~350 210 38 50 50