A steel coil is a long, coiled strip of metal that is wound up into a roll. Steel coils are made from various types of steel, each with its own unique properties and characteristics. Here are some common materials used to make steel coils:
- Hot Rolled Steel:
- Cold Rolled Steel:
- Galvanized Steel
- Stainless Steel:
- Alloy Steel:
- Strips:
This is a type of steel that is rolled at high temperatures, typically above 1700 degrees Fahrenheit. Hot rolled steel is commonly used for construction and manufacturing applications.
This is a type of steel that is rolled at lower temperatures than hot rolled steel, typically between room temperature and 1600 degrees Fahrenheit. Cold rolled steel is commonly used in applications where surface finish and dimensional accuracy are important.
This is a type of steel that has been coated with a layer of zinc to protect it from corrosion. Galvanized steel coils are commonly used in outdoor and marine applications where exposure to moisture and saltwater can cause corrosion.
This is a type of steel that contains at least 10.5% chromium, which makes it highly resistant to corrosion and staining. Stainless steel coils are commonly used in applications that require high corrosion resistance, such as in the food industry, medical equipment, and marine applications.
This is a type of steel that has been combined with other elements to improve its properties, such as strength, hardness, and toughness. Alloy steel coils are commonly used in applications that require high strength, such as in the automotive and aerospace industries.
These strips offer precise width, thickness, and length tolerances, making them ideal for applications such as electrical panels, machinery parts, and packaging materials. High-quality strips ensure consistent mechanical properties, surface finish, and corrosion resistance for demanding industrial uses.
These are some of the most common materials used to make steel coils, but there are many other variations available to suit different applications and requirements.
Coil Specifications
| Material | Thickness Range | Width Range | Inner Diameter | Outer Diameter | Tolerance |
|---|---|---|---|---|---|
| Hot Rolled Steel Coil | 1.5mm to 20mm | 1000mm to 2000mm | 508mm or 610mm | Max. 2000mm | +/- 0.2mm to +/- 3mm |
| Cold Rolled Steel Coil | 0.3mm to 3mm | 1000mm to 1500mm | 508mm or 610mm | Max. 2000mm | +/- 0.05mm to +/- 0.5mm |
| Galvanized Steel Coil | 0.3mm to 5mm | 1000mm to 1500mm | 508mm or 610mm | Max. 2000mm | +/- 0.05mm to +/- 0.5mm |
| Stainless Steel Coil | 0.3mm to 12mm | 1000mm to 2000mm | 508mm or 610mm | Max. 2000mm | +/- 0.1mm to +/- 3mm |
Coil Grades
| Material | Standard | Available Grades |
|---|---|---|
| Stainless Steel Coils | ASTM / ASME A240 | 304, 304L, 316, 316L, 309, 310S, 409, 430 |
| Cold Rolled Steel Coils (CR) | ASTM A1008 / JIS G3141 | CR1, CR2, CR3, CR4, SPCC, SPCD, SPCE |
| Hot Rolled Steel Coils (HR) | ASTM A1011 / JIS G3132 | HR1, HR2, SS400, S235JR, S275JR, A36 |
| Galvanized Coils (GI) | ASTM A653 / JIS G3302 | SGCC, SGCH, DX51D, DX52D, DX53D |
| Galvalume Coils (GL / Alu-Zinc) | ASTM A792 / JIS G3321 | AZ50, AZ55, AZ70, AZ100, AZ150 |
| Prepainted Coils (PPGI / PPGL) | ASTM A755 / JIS G3312 | PPGI DX51D, PPGL AZ70, AZ100, AZ150 |
| Aluminium Coils | ASTM B209 | 1100, 3003, 5052, 5083, 6061, 8011 |
| Copper & Copper Nickel Coils | ASTM B152 / B466 | C101, C102, C110, 90/10 CuNi, 70/30 CuNi |
| Nickel Alloy Coils | ASTM B168 / B443 | Inconel 600, 625, 800, 825, Alloy 20 |
| Hastelloy Coils | ASTM B575 | C22, C276, B2, X |
Coil Features
- High tensile strength
- Very durable
- Temperature resistant
- Easy formability and fabrication
- Low-maintenance
Finishes Type Of Coil
| Patterned Finish | 2B Finish |
| Hairline Finish Plate | Mirror Finish Plate |
| No. 8 Finish | Brushed Finish |
| No.4 Finish | Embossed Finish |
| No. 4 – Brushed finish | 2R (Bright Annealed) Finish |
| No. 2B – Matte finish | No.8 – Mirror finish |
| Polished Finishes | Mirror Polished |