Steel Coil

Processing Services (Coil Processing & Customization)

Selling full-width steel coils is only part of our service. We provide comprehensive in-house coil processing to save you time, reduce material waste, and lower your overall manufacturing costs.

1. Slitting Service

Custom Widths: We can slit master coils into narrow strips with precise tolerances (as narrow as 10 mm), ready for your stamping, roll forming, or pipe making lines.

Slit Edges: We offer precise slit edges (burr-free) to ensure smooth feeding and protect your tooling.

Oscillate Winding (For Narrow Strip): Available for small-diameter, heavy-weight narrow strips used in welding wire or specialized manufacturing.

2. Cut-to-Length (CTL)

Precision Leveling: Our heavy-duty leveling lines eliminate coil memory and internal stress, delivering perfectly flat sheets.

Custom Lengths: We cut sheets to your exact specified lengths (e.g., 2000mm, 2500mm, 3000mm), eliminating on-site shearing and scrap.

Square Cutting: High-precision flying shears guarantee square corners and accurate diagonal tolerances.

3. Edge Trimming & Welding

Mill Edge vs. Slit Edge: We can supply coils with the original mill edge (for cost savings) or precisely trimmed slit edges.

Coil Joining: We can weld smaller coils together to create larger, continuous coils to maximize your continuous production line efficiency.

4. Custom Packaging

Eye-to-Sky (Vertical) or Eye-to-Wall (Horizontal): We pack coils according to your crane or forklift handling capabilities.

Custom Coil Weights: We can cut coils down to smaller weights (e.g., 3 tons - 5 tons) to fit your specific machine capacity.

Coating & Surface Quality

We apply strict quality control to ensure consistent coating thickness, flawless surface appearance, and excellent formability for downstream processing.

1. Zinc Coating (For Galvanized Coils - GI/GL)

Zinc Coating Mass: Available in standard weights (e.g., Z120, Z180, Z275, or AZ150 for Galvalume) to meet different corrosion resistance requirements. Coating mass is tested on both sides to ensure uniformity.

Surface Finish: Available in regular spangle (standard crystalline finish), minimized spangle, or skin-passed (smooth) finish for painting.

Anti-Fingerprint (AFP): A thin organic coating applied to the surface to prevent fingerprints and oxidation during handling and transportation.

Chromate Passivation: Enhances corrosion resistance and prevents white rust during sea transit.

2. Paint Coating (For Prepainted Coils - PPGI)

Coating Structure: Topcoat and primer applied on both sides (e.g., 20μm top / 5μm back). Custom thickness available.

Paint Types: Polyester (PE), Silicon Modified Polyester (SMP), Polyvinylidene Fluoride (PVDF), and Epoxy.

Adhesion Test: All paint is subjected to a T-bend test (usually 0T to 3T) to ensure the paint film does not peel or crack during severe bending.

Pencil Hardness: Tested to ensure the surface resists scratches during fabrication.

Gloss & Color: RAL color matching and gloss control to meet architectural and appliance standards.

3. Base Metal Surface Quality (For HRC/CRC)

No Lamination or Cracks: 100% inspected before packing.

Pickled & Oiled (P&O): Scale-free surface for cold-rolled coils, protected with a uniform anti-rust oil layer.

Edge Quality: Burr-free slit edges or uniform mill edges.

Q1: What is the difference between Hot-Rolled (HRC) and Cold-Rolled Coils (CRC)?
A: HRC are processed at high temperatures, offering better ductility, lower costs, and a rougher surface, making them ideal for structural pipes and heavy machinery. CRC are further processed at room temperature after pickling, providing tighter dimensional tolerances, a smoother surface, and higher strength, which are preferred for automotive panels, appliances, and precision stamping.

Q2: What does "Zinc Coating Mass" (e.g., Z120, Z275) mean?
A: The "Z" number indicates the total zinc coating mass in grams per square meter (g/m²) on both sides of the coil. For example, Z120 means 120 g/m² of zinc (60 g/m² per side), offering moderate corrosion resistance for indoor use. Z275 offers a much thicker layer (275 g/m² total), ideal for outdoor roofing and harsh environments.

Q3: What is the difference between "Mill Edge" and "Slit Edge"?
A: Mill Edge retains the original rolled edge from the steel mill, which may have slight irregularities but is more cost-effective. Slit Edge has been precisely cut on our slitting line, providing straight, burr-free edges with exact widths, which is essential for automated stamping, roll forming, and pipe making.

Q4: How do you ensure the paint won't peel off your PPGI coils?
A: We maintain Strict Quality Control on our prepainted coils. The paint adhesion is verified through a T-bend test (ensuring the paint film withstands 0T to 3T bending without cracking) and a Pencil Hardness test to prevent scratches during fabrication. We also use high-quality primers and topcoats (PE, SMP, PVDF) matched to your application.

Q5: Can you supply custom slit widths and cut-to-length sheets?
A: Yes. We offer Integrated Customized Services. We can slit master coils into narrow strips (as narrow as 10-20 mm) or uncoil and cut them into flat sheets (CTL) to your exact lengths. This significantly reduces material waste and saves you from investing in processing equipment.

Q6: What are your payment terms and lead times?
A: We offer Flexible Payment plans, including L/C (Letter of Credit) and open account. Standard lead times are typically 20–35 days after receipt of the advance payment, depending on the coil types, coating requirements, and order volume.