Aluzinc Prepainted Steel Coil Suppliers - Galvanized Alloy Coated Metal Rolls

Aluzinc prepainted steel coil suppliers provide factory-direct access to aluminum-zinc alloy coated steel substrates with organic paint finishes, engineered for superior corrosion resistance and aesthetic versatility. This composite material combines the sacrificial protection of zinc with aluminum's oxidation barrier, delivering service life up to 4 times longer than conventional galvanized products in industrial and coastal environments. Target customers include metal building contractors, appliance manufacturers, and architectural cladding fabricators requiring pre-finished coil stock with guaranteed coating adhesion per ASTM D3359.

What is Aluzinc Prepainted Steel Coil?

Aluzinc prepainted steel coil consists of cold-rolled steel substrate hot-dip coated with 55% aluminum-43.4% zinc-1.6% silicon alloy (per ASTM A792/A792M), subsequently treated with chemical conversion coating and finished with polyester, PVDF, or SMP paint systems. The metallic coating weight ranges from AZ50 to AZ185 (150-550 g/m²), while organic topcoat thickness varies between 15-27 microns depending on exposure classification.

Aluzinc Prepainted Steel Coil Technical Specifications

Standard production parameters include substrate thickness from 0.23mm to 1.20mm, coil width 600-1500mm, and yield strength 280-550 MPa per EN 10169. The aluminum-zinc coating provides thermal reflectivity of 0.61-0.68, reducing cooling loads by 15-20% compared to darker finishes. Paint adhesion must achieve minimum 5B rating per cross-hatch test, with pencil hardness ≥2H for industrial applications.

Why Choose Professional Aluzinc Coil Suppliers

Established suppliers maintain ISO 9001:2015 certified production lines with continuous galvanizing kettles, tension levelers, and multi-roll coating applicators ensuring uniform film thickness within ±2 microns. Mill-direct sourcing eliminates intermediary markups while guaranteeing traceability through heat number documentation and third-party inspection certificates. Value-added services include precision slitting to ±0.5mm tolerance, custom RAL color matching, and protective PE film lamination for transit protection.

Frequently Asked Questions

What is the minimum order quantity for custom colors?

Standard MOQ for bespoke color formulations is 25 metric tons per SKU to justify paint kitchen setup costs. Stock colors in RAL 9002, 3009, and 5015 are available from 5 tons with 7-10 day lead time from bonded warehouse inventory.

Do you provide material test certificates with chemical composition analysis?

Every coil shipment includes mill test certificate per EN 10204 3.1 standard, detailing substrate chemistry (C≤0.01%, Mn 0.10-0.60%), coating weight verification via triple-spot XRF analysis, and paint system specifications including resin type, curing temperature, and gloss level at 60° geometry.

What is the typical delivery time for standard specifications?

In-stock items ship within 3-5 business days FOB manufacturing facility. Custom orders requiring specific coating weights or non-standard widths require 18-25 days production cycle, including substrate procurement, coating line scheduling, and quality assurance testing per ASTM D7091 accelerated weathering protocol.

Can you process coils to custom slit widths and recoil to smaller diameters?

Precision slitting services accommodate widths from 80mm to 1250mm with edge camber controlled to ≤3mm per meter. Recoiling to 508mm or 610mm internal diameter is standard, with optional oscillate winding for improved coil geometry. Maximum slit coil weight is 8 tons for standard lifting equipment compatibility.

Get a Competitive Quote for Aluzinc Prepainted Steel Coil

Request factory-direct pricing with detailed specifications including substrate grade, coating designation (AZ100/AZ150), paint system requirements, and annual volume projections. Our technical sales team provides material selection guidance, corrosivity classification assessment per ISO 12944, and logistics optimization for container or break-bulk shipments. Contact us for mill test reports, color chip samples, and performance warranties backed by 15+ years of export experience to 47 countries.