Wholesale Prepainted Galvanized Steel Coil - High-Strength AZ150 Coated

Technical Specifications of Wholesale Prepainted Galvanized Steel Coil

Wholesale Prepainted Galvanized Steel Coil - High-Strength AZ150 Coated

Wholesale prepainted galvanized steel coil represents a premium-grade metal substrate engineered for construction, appliance manufacturing, and architectural applications demanding superior corrosion resistance combined with aesthetic versatility. This factory-direct product features a continuous hot-dip galvanized base layer with zinc coating mass ranging from Z80 to AZ150 (80-150 g/m²), subsequently treated with chromate conversion coating and topped with polyester, silicon-modified polyester (SMP), or polyvinylidene fluoride (PVDF) paint systems. Targeted at metal fabricators, roofing contractors, and OEM manufacturers, this coil stock delivers exceptional formability with T-bend ratings of 0T-2T per ASTM A755/A755M standards, enabling tight-radius forming without paint delamination while maintaining a service life exceeding 15-25 years in moderate to severe atmospheric conditions.

What is Wholesale Prepainted Galvanized Steel Coil?

Wholesale prepainted galvanized steel coil constitutes a continuous-coil metal product where cold-rolled steel substrate undergoes hot-dip galvanization to deposit a protective zinc or zinc-aluminum alloy layer, followed by chemical pretreatment and electrostatic application of organic coatings in thicknesses ranging from 15 to 25 microns per side, manufactured in accordance with ASTM A755, EN 10169, or JIS G3312 specifications for architectural and industrial use.

Wholesale Prepainted Galvanized Steel Coil Technical Specifications

Standard configurations include substrate thickness from 0.30 mm to 1.20 mm with width availability of 914 mm to 1,250 mm, coil weight capacity up to 8 metric tons, and zinc coating designation complying with Z275 (275 g/m² total both sides) minimum per ASTM A653/A653M. The steel base material exhibits yield strength of 280-550 MPa depending on grade selection (DX51D, DX52D, DX53D per EN 10346), with carbon content maintained below 0.12% maximum to ensure optimal weldability and forming characteristics suitable for roll-forming, press-braking, and shearing operations.

Why Choose Our Prepainted Galvanized Steel Coil

Our manufacturing facility operates continuous coil coating lines achieving paint thickness uniformity within ±2 microns, equipped with infrared curing ovens maintaining precise temperature profiles of 230°C ±5°C for polyester systems, ensuring superior paint adhesion exceeding 100% retention per ASTM D3359 cross-hatch testing. We provide mill test certificates documenting chemical composition per ASTM E1086 optical emission spectrometry, mechanical properties validated through ASTM E8 tensile testing, and coating weight verification via ASTM A90 triple-spot testing methodology, backed by ISO 9001:2015 quality management certification.

Frequently Asked Questions

What is the minimum order quantity (MOQ)?

Our standard MOQ stands at 25 metric tons per specification (single color, thickness, and width combination), with flexibility for mixed-container orders totaling 25 tons across multiple SKUs, accommodating trial orders of 10 tons for qualified distributors establishing long-term supply agreements with quarterly volume commitments exceeding 100 tons annually.

Do you provide material test certificates?

Every coil shipment includes EN 10204 Type 3.1 mill test certificates issued by our CNAS-accredited laboratory, documenting chemical composition analysis, tensile properties (yield strength, tensile strength, elongation percentage), coating weight measurements, and paint system specifications including pencil hardness (minimum H per ASTM D3363), impact resistance (50 kg-cm per ASTM D2794), and salt spray performance (minimum 1,000 hours per ASTM B117 for standard polyester).

What is the typical delivery time?

Standard color offerings from our regular production inventory ship within 15-20 calendar days from deposit receipt, while custom RAL/Pantone color matching requiring new paint batch formulation extends lead time to 25-30 days, inclusive of sample approval cycle. Expedited production slots accommodate urgent requirements with 10-day turnaround for premium surcharge of 8-12% above standard mill-direct pricing.

Can you cut to custom sizes?

Our precision slitting lines accommodate width tolerances of ±3 mm for widths below 1,000 mm and ±5 mm for wider specifications, with minimum slit width of 100 mm and maximum of 1,250 mm. Cut-to-length processing delivers sheets from 1,000 mm to 6,000 mm length with squareness tolerance within 3 mm per meter, suitable for panel fabricators requiring ready-to-form blanks eliminating secondary processing operations.

Get a Competitive Quote for Wholesale Prepainted Galvanized Steel Coil

Contact our technical sales team for volume-based pricing reflecting current zinc surcharges, paint system selection, and delivery terms. We provide landed cost quotations inclusive of ocean freight, insurance, and destination port handling for containerized shipments, with payment terms supporting LC at sight, TT with 30% deposit, or established credit facilities for qualified accounts. Request sample books displaying our standard color range and technical data sheets specifying paint system warranties aligned with your project exposure classification requirements.