Authentic Steel produces high-precision zero spangle galvanized steel coils (also known as non-spangle or smooth GI coils) engineered specifically for applications requiring superior surface flatness, aesthetic uniformity, and flawless paint adhesion. Manufactured by precise lead-free hot-dip galvanizing process followed by skin-pass rolling treatment, our zero spangle coils feature a uniform, crystal-free silver appearance without visible zinc flowers or surface roughness.
Zero spangle galvanized steel coils are the premier material choice for downstream prepainted steel (PPGI) production, precision stamping, home appliance manufacturing, and architectural interior paneling. The absence of zinc crystal boundaries eliminates surface telegraphing when painted, ensuring a micro-smooth finish for high-end industrial and commercial applications.
Surface Finish: Zero Spangle / Non-Spangle (Skin-passed extra smooth surface finish)
Thickness Range: 0.15mm to 3.00mm precision tolerance control)
Width Availability: 600mm, 914mm, 1000mm, 1200mm, 1219mm, 1250mm, 1500mm, or customized slitted strips
Zinc Coating Weight: Z30 to Z275 (Dual-sided continuous hot-dip zinc protection)
Substrate Mechanical Grades: Commercial Quality (CQ / SPCC / DX51D+Z), Drawing Quality (DQ / DX52D+Z), Deep Drawing Quality (DDQ / DX53D+Z / DX54D+Z), Structural Quality (S250GD+Z to S350GD+Z)
Surface Passivation & Sealing: Anti-Fingerprint (AFP Clear/Blue/Green), Chromated Passivation, Oiled, Dry
Compliance Standards: ASTM A653 / A653M, EN 10346, JIS G3302, GB/T 2518
Substrate for Prepainted Steel (PPGI): Essential base substrate for high-gloss prepainted steel coils (PPGI), ensuring zero zinc texture reflection through organic paint coatings.
Home Appliances & HVAC Cabinets: Widely used in air conditioner outdoor casings, refrigerator back panels, washing machine side panels, and microwave oven enclosures.
Precision Automotive & Electronic Parts: Formed into internal automotive reinforcement brackets, computer server rack chassis, electrical distribution boxes, and cable tray covers.
Architectural Interior Wall Panels: Utilized for high-end cleanroom partition walls, ceiling tiles, elevator cabin doors, and decorative architectural cassettes.
Flawless Skin-Passed Surface Smoothness: Our secondary inline skin-pass (temper rolling) mill removes surface yield elongation, flattens tension lines, and imparts optimal surface micro-roughness for high-grade organic coating adhesion.
Environmentally Compliant & Lead-Free: Produced using high-purity 99.995% zinc ingots without lead addition, fully compliant with global RoHS and REACH environmental regulations.
Seaworthy Rust-Proof Packaging: Each coil is wrapped in multi-layer VCI corrosion-inhibiting paper, PE waterproof membrane, galvanized steel edge protectors, and high-tensile steel strapping on sturdy wooden pallets to eliminate transit rust.
