Black annealed cold rolled steel coil is a high-quality low-carbon steel plate that has been cold rolled and annealed. The surface is dark gray (without pickling or coating treatment), with excellent formability, flatness and dimensional accuracy. It is suitable for stamping, bending and deep drawing processes that do not require high surface quality but require high plasticity.
Cold Rolled Black AnnealedCRBA Coil Features
✅ High formability
Annealing softens the material and makes it elongated (A80≥30%), which is suitable for complex stamping and deep drawing.
✅ Accurate dimensions
The cold rolling process ensures a small thickness tolerance (±0.03mm), a smooth surface, and no oxide scale residue.
✅ Economical and practical
Compared with galvanized or pickled plates, it has lower costs and is suitable for subsequent secondary processing such as spraying and electroplating.
Technical Parameters
|
Item |
Parameters |
|
Material |
Low carbon steel (such as DC01, DC03, SPCC) |
|
Surface condition |
Black annealed (unpickled, slight oxide film) |
|
Thickness range |
0.3mm~3.0mm (customizable) |
|
Width range |
600mm~1500mm |
|
Yield strength |
120~220 MPa (annealed state) |
|
Tensile strength |
270~400 MPa |
|
Elongation |
≥30% |
|
Roll weight |
3~10 tons/roll (can be cut) |
Advantages comparison
|
Features |
Black annealed cold rolled coil |
Galvanized sheet |
Pickling plate |
|
Cost |
Minimum |
Higher |
Medium |
|
Rust resistance |
Subsequent treatment required |
Excellent (zinc layer protection) |
General (short-term rust prevention) |
|
Formability |
Excellent (annealed and softened) |
Good |
Excellent |
|
Surface condition |
Dark grey, uncoated |
Bright silver zinc layer |
Off-white |
Application areas
🔹 Metal stamping: hinges, brackets, metal boxes
🔹 Home appliance manufacturing: air conditioner shell, washing machine inner drum frame
🔹 Auto parts: seat slides, fuel tank reinforcement plates
🔹 Architectural decoration: concealed structural parts, metal curtain wall substrates
Storage and processing recommendations
Storage: Store in a dry environment, avoid moisture, and prevent oxidation and rust.
Processing:
Lubricant can be applied before stamping to reduce mold wear.
Welding requires the removal of surface oxide film to ensure joint strength.
Protection: It is recommended to spray or electroplating anti-rust treatment within 48 hours after processing.
Why choose our black annealed cold rolled steel coil?
✨ Strictly control the composition to ensure no cracking during stamping
✨ Uniform thickness, precise tolerance, and reduced scrap rate
GNEE Group strictly follows domestic and international trade practices, regards reputation as life, and provides all customers with the best quality products and the most complete services. The company has established a complete service system and technical support system, not only providing customers with the best quality products, but also providing complete after-sales service.
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