Black Annealed Cold Rolled Steel Coil – Coating Substrate Grade
Product Overview
Black annealed cold rolled steel coil is a cost-effective substrate material designed specifically as feedstock for hot-dip galvanizing, galvalume, color coating and electroplating lines. Manufactured by cold rolling and annealing with controlled surface chemistry and roughness, this grade delivers excellent coating adhesion, uniform surface quality and consistent processability. It is optimized for continuous coating lines, providing a reliable base for high-quality finished coated steel products.
Why Choose CNB Coating Substrate Steel?
We supply coating-grade substrate coils from mills specializing in galvanizing and color coating feedstock, with strict control over surface cleanliness, roughness and flatness to optimize coating line performance. Our substrate coils are produced to consistent thickness and width tolerances to ensure smooth running on high-speed continuous coating lines, reducing line downtime and improving finished product yield.
Key Specifications
| Item | Specification |
|---|---|
| Product Name | Black Annealed Cold Rolled Substrate Coil |
| Steel Grade | SPCC / DX51D base grade |
| Product Form | Coil (feedstock for coating lines) |
| Thickness Range | 0.12mm – 2.0mm |
| Standard Widths | 900mm, 1000mm, 1200mm, 1250mm |
| Coil Inner Diameter | 508mm / 610mm |
| Coil Weight | 5MT – 15MT per coil |
| Surface Condition | Black annealed, scale-free, uniform |
| Applicable Standards | GB/T 11253, coating substrate standards |
| Surface Roughness | Controlled for optimal coating adhesion |
| Flatness | Optimized for continuous coating lines |
Core Advantages
- Coating-optimized surface: Clean uniform surface for excellent coating adhesion and finish.
- Cost-effective substrate: Lower cost than bright cold rolled for coating feedstock.
- Process consistent: Tight dimensional tolerances for smooth high-speed line running.
- Coating line proven: Widely used in galvanizing and color coating lines across China.
- Customizable: Tailored surface roughness and chemistry for specific coating processes.
Applications
This black annealed cold rolled coil is predominantly used as feedstock for hot-dip galvanizing lines, galvalume coating lines, color coating (PPGI/PPGL) lines, electroplating lines and general coating processes. It is also used for internal structural parts and tubing where surface appearance is not critical.
Get a Quotation
We supply coating-grade substrate coils in various grades, thicknesses and widths optimized for galvanizing, galvalume and color coating lines. Custom surface specifications and coil weight configurations are available upon request. Contact our coating materials team for a substrate quotation tailored to your line requirements.
