Cold Rolled Steel (CR) Strips / Coils
Product
Cold Rolled Steel (CR) Strips / Coils
With the growing demand of cold rolled strips and sheets, SWASTIK PIPE LIMITED has started manufacturing CR coils and strips in year 2003 with annual capacity of 1 lac MT / annum in various sizes and thickness.
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
Strip Width
12mm to 1250mm
Strip Thickness
0.3mm to 3.2mm
Coil Weight
2-17 Kg/mm width
Coils Diameter
Internal 400mm & 500mm External 1700mm (max)
CR Strips
Mild Steel in Drawing, Deep Drawing, Extra Deep Drawing Grades Medium and High carbon, SAE 1020, If Steel, High Tensile Steel ( SPC-370-440)
Specifications
IS 513, BS 1449, JIS G3141, DIN1623, IS 7226 and equivalent. SPCC, SPCD,SPCE
Cut to Length Sheets
Length 350mm to 3000mm Width 40mm to 1250mm Thickness 0.40mm to 3.2mm
Surface Finish
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
CR Surface Finish Bright / Polished Mat Finished
Most of the applications are covered with this Surface roughness to have trouble free deep drawing and lacquering operations.
- Semi processed unalloyed electrical
- Hot rolled oiled & picketed steel
APPLICATIONS & SPECIFICATION
Customized Cold Rolled Steel sheets and strips are used for the follows applications:-
A.C. & Refrigerator industry
Washing Machine
Electrical Parts
Electronic 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 | |
| Extra Deep Drawing Quality | - | - | - | - | - | FEP05 | |
| Super Extra Deep Drawing Quality (If Grade | - | - | - | - | - | FEP06 | |
| 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 |
Note:
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 | |||||||||
Note:
1. For the intermediate nominal thickness of 0.4mm or more and 1.6mm or less which are not listed in this table, the value shall be obtained by the method of interposition and rounded off at one place of decimal.
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 |
Note:
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 |