Zinc Aluminum Alloy Steel Coil - Galvanized ZnAl Coated Cold Rolled Steel Strip

Zinc aluminum alloy steel coil represents a premium-grade corrosion-resistant steel product that combines the protective properties of zinc with aluminum's oxidation resistance. This advanced coating technology delivers superior durability for construction, automotive, and appliance manufacturing applications where long-term performance in challenging environments is essential. Engineered for manufacturers seeking cost-effective alternatives to traditional galvanized steel, these coils provide enhanced service life while maintaining excellent formability and weldability characteristics.

What is Zinc Aluminum Alloy Steel Coil?

Zinc aluminum alloy steel coil is cold-rolled steel substrate coated with a metallic layer consisting of zinc (typically 43.4%-88%), aluminum (5%-55%), and minor alloying elements such as silicon and rare earth metals. The coating is applied through continuous hot-dip galvanizing processes per ASTM A792/A792M standards, creating a metallurgical bond that provides barrier protection and sacrificial corrosion resistance. Common coating designations include ZA (zinc-aluminum), Galvalume, and Zincalume, with coating weights ranging from 30 g/m² to 275 g/m² depending on service requirements.

Zinc Aluminum Alloy Steel Coil Technical Specifications

Standard substrate materials include commercial quality cold-rolled steel conforming to ASTM A1008 with thickness ranging from 0.12 mm to 3.0 mm and widths up to 1,850 mm. The zinc-aluminum coating composition follows ASTM A792 Type ZA specifications with 55% aluminum-43.4% zinc-1.6% silicon for optimal corrosion performance. Mechanical properties include minimum yield strength of 140 MPa for structural grade and tensile strength of 270 MPa minimum. Surface finishes available include regular spangle, minimized spangle, and skin-passed options with coating adhesion meeting bend test requirements per ASTM A1003 Section 7.3.

Why Choose Our Zinc Aluminum Alloy Steel Coil?

Our manufacturing facility operates continuous galvanizing lines with precise coating weight control systems ensuring uniform ZnAl application within ±10 g/m² tolerance. We maintain ISO 9001:2015 certification and provide complete mill test certificates documenting chemical composition, mechanical properties, and coating weight verification per customer specifications. With annual production capacity exceeding 500,000 metric tons and strategic warehouse locations, we deliver factory-competitive pricing with lead times of 15-25 days for standard specifications and 30-40 days for customized orders including slit widths and special tempers.

Frequently Asked Questions

What is the minimum order quantity (MOQ)?

Our standard MOQ is 25 metric tons per specification for stock items. For customized widths, coating weights, or special chemical compositions, the minimum order increases to 100 metric tons to optimize production efficiency. We offer flexible payment terms including LC at sight and TT with 30% deposit for established customers.

Do you provide material test certificates?

Yes, we supply comprehensive mill test certificates (MTC) per EN 10204 Type 3.1 standards with every shipment. Documentation includes chemical analysis results, mechanical property test data, coating weight measurements, and surface quality inspection reports. Third-party inspection services from SGS, BV, or Intertek can be arranged at customer request.

What is the typical delivery time?

Standard specifications from existing inventory ship within 7-10 business days after deposit confirmation. Custom orders requiring specific substrate grades, coating formulations, or width slitting require 20-30 days production time plus 15-20 days ocean freight to major international ports. Express production scheduling is available for urgent requirements with 10-15 day lead times subject to capacity availability.

Can you cut to custom sizes?

Our precision slitting equipment handles coil widths from 20 mm to 1,850 mm with tolerance of ±0.5 mm. We provide edge trimming, tension leveling, and recoiling services to customer specifications. Cut-to-length processing is available for sheet applications with lengths up to 12,000 mm and thickness range of 0.15 mm to 2.5 mm maintaining flatness within I4 tolerance per ASTM A1003.

Get a Competitive Quote for Zinc Aluminum Alloy Steel Coil

Contact our technical sales team today to receive mill-direct pricing for your zinc aluminum alloy steel coil requirements. We provide detailed quotations within 24 hours including material specifications, coating options, packaging details, and logistics solutions tailored to your project timeline. Our engineering support staff assists with material selection, forming recommendations, and application-specific technical guidance to ensure optimal performance in your manufacturing processes.