Cold Rolled Steel can also be termed as Semi-finished or Non-coated steel which is produced in different levels of Hardness/Finish. The hardness/finish is classified as Cold Rolled Full Hard (CRFH) & Cold Rolled Closed Annealed (CRCA) Steel. It is produced by the process of Cold Reduction (i.e) by rolling the raw material Hot Rolled Coil in reversible direction applying pressure from top/bottom of the sheet using multiple Solid Rollers. The steel coils can be annealed (heated in a controlled atmosphere) to make the steel more formable (cold rolled annealed) or further processed on the metallic coating line, with a coating of Zinc (galvanised). Cold rolled steel is available in a range of grades, each with a range of properties for differing applications. .
| Specification | ASTM A 366/A 568/A 620, Euro norm EN 10130,JIS G 3141-1B(Full Hard) & Other equivalent specifications |
|---|---|
| Width Range (mm) | 750 to 1250 mm |
| Thickness Range | 0.15 mm to 1.00 mm |
| Coil Weight | 5 to 10 MT max |
| Coil ID | 508 / 610 mm |
| Hardness | Min.85 HRB and above. |
| Edge Condition | Smooth Mill Edges or Trimmed Edges (For Thinner Gauges) as required. |
| Surface Finish | Bright |
| Specification | Grade / Quality |
| JIS-G-3141-1996 ( Japanese) | SPCC-SD/SB,SPCD-SD/SB , SPCE-SD/SB,SPCEN-SD/SB , CR-1,CR-2,CR-3 & CR-4 |
| DIN 1623-Part 1 (German) | St-12,St-13,St-14 |
| BS 1449,Part 1 (British) | CR-1,CR-2,CR-3 & CR-4 |
| ASTM | A 1008/M 1008-01a,A 366,A 619,A 620,A 629,A 606 & A 609 |
| SAE | 1010100,81,006 |
| IS-513-1994/1997 (Indian) | EDD,DD,D & O |
| Dimensional Range | Thickness: 0.30 to 2.00 mm |
| Width: 900 / 1250mm max | |
| Coil Id: 508 mm/610 mm | |
| Coil Wt: 5 to 8 MT max | |
| Packing: Sea Worthy Export Packaging |
| Field of Application | General Construction, Pressure Vessels, Automobile Industry, Structural Uses, Pipes and Tubes, Shipbuilding |
|---|---|
| Machine Components, Agricultural Instruments | |
| Production Standards & Steel Grades (I) | EN 10025 S 235 JR G2 (=DIN 17100 RSt 37-2) |
| EN 10025 S 275 JR (=DIN 17100 St 44-2) | |
| EN 10025 S 275 J2G3 (=DIN 17100 St 44-3) | |
| EN 10025 S 355 J2G3 (=DIN 17100 St 52-3) | |
| EN 10111 DD 11 / DIN 1614 P2 StW 22 | |
| EN 10111 DD 12 / DIN 1614 P2 RRStW 23 | |
| Production Standards & Steel Grades (II) | EN 10111 DD 13 / DIN 1614 P2 StW 24 |
| EN 10149 – S315MC, S355MC, S420MC, S460MC, S500 MC | |
| DIN 1614-1 St 22 or RRSt 23 (FOR RELOLLIBG) | |
| JIS G 3132 SPHT-2 | |
| JIS G 3101 SS 400 | |
| JIS G 3125 SPA-H / CORTEN A | |
| SAEJ 403-1070 | |
| API 5L-X 42-X 52-X 60-X 65-X70-PSL 1 | |
| J55 / H40 | |
| ASTM A 36, ASTM A 53 Gr.A, ASTM A 570 Gr.33, ASTM | |
| ABS – PS2 -04 AH 32 / AH 36 | |
| A-659 Gr.1018 ,Other special grades are avaliable upon request | |
| Sizes | HR COILS |
| Thickness: 1.00 mm – 18.00 mm Width: 700 – 1525 mm (varies with thickness) | |
| Coil Weight: 6.0 tons – 29.5 tons (varies with thickness) | |
| HR SHEETS | |
| Thickness: 1.50 mm – 16 mm Width: 700 – 2600 mm (varies with thickness) | |
| Packing weith: min 2 tons | |
| Marking | Information tags on coils or bundles |
| Packing | Can be wrapped in protective cover supported with wooden skids waterproof paper and other special wrapping material |
| Applicable upon request | |
| Mill Certificates | Issued upon request according to EN 10204 2.2; 3.1 (3.2 available on special request) |