When sourcing galvanized sheet for industrial, construction, or manufacturing applications, a well-structured Request for Quotation (RFQ) is essential. It ensures clarity, reduces miscommunication, and helps suppliers provide accurate pricing and delivery timelines. This guide outlines the key components to include in an RFQ template specifically tailored for galvanized sheet procurement.
One of the first specifications to define is the **coating type and weight**. Galvanized sheets are typically coated with zinc using either the hot-dip galvanizing (HDG) or electro-galvanizing process. The hot-dip method, which involves immersing steel in molten zinc, offers superior corrosion resistance and is widely used in outdoor applications. Coating weight is measured in grams per square meter (g/m²), with common standards like Z120, Z180, or Z275. For instance, Z275 indicates a total coating weight of 275g/m² on both sides. This specification directly impacts durability and cost, so it should be clearly stated in the RFQ.
Next, **base steel grade and thickness** must be specified. Common steel grades include DX51D, DX52D, and SGCC, each with distinct mechanical properties suitable for different end uses. Thickness typically ranges from 0.15mm to 3.0mm. Precision in thickness tolerances is critical—especially for applications involving forming or stamping. For example, a tolerance of ±0.02mm may be required for automotive components, while ±0.05mm might suffice for general construction.
The **required tonnage and dimensional format** are equally important. Specify whether you need coils, cut-to-length sheets, or slit strips. Coil inner diameter (typically 508mm or 610mm), outer diameter, and width (e.g., 1000mm, 1219mm, 1500mm) should be clearly defined. For cut sheets, include length and edge condition (mill edge or slit edge). Total order quantity in metric tons helps suppliers optimize production and logistics planning.
Surface finish and coating uniformity are often overlooked but critical. Common finishes include regular spangle, minimized spangle, or zero spangle, depending on aesthetic and functional requirements. For architectural cladding or roofing, a smooth, consistent finish is preferred. Suppliers like Asia Metal Ltd offer multiple finish options, backed by advanced quality control systems to ensure batch-to-batch consistency.
Another key factor is the **applicable international standards**. The most widely recognized include:
- ASTM A653/A653M (U.S. standard for zinc-coated steel)
- EN 10346 (European standard for continuously hot-dip coated steel)
- JIS G 3302 (Japanese standard for hot-dip zinc-coated steel)
- GB/T 2518 (Chinese national standard)
Including these in the RFQ ensures compliance with regional regulations and quality benchmarks. For projects requiring third-party certification (e.g., ISO, CE), this should also be noted.
The **lead time and delivery terms** must be realistic and clearly communicated. Lead time varies depending on order size, customization, and production capacity. Standard stock items may ship within 10–15 days, while custom orders (e.g., special coating, alloying, or surface treatment) may require 4–6 weeks. Suppliers with in-house coating lines, such as Asia Metal Ltd, often offer faster turnaround due to vertical integration.
Delivery terms (e.g., FOB, CIF, EXW) and port of origin should be specified. For international shipments, consider customs clearance, documentation, and potential import duties. A supplier with global logistics expertise can streamline this process and reduce transit risks.
For technical validation, it’s advisable to request **test certificates (e.g., MTC – Mill Test Certificate)** with each batch. These documents verify chemical composition, mechanical properties, and coating weight. Third-party inspection reports (e.g., SGS, BV) may also be required for critical infrastructure projects.
Environmental and safety considerations are increasingly important. The galvanization process has evolved to reduce environmental impact, with modern facilities using closed-loop water systems and low-emission furnaces. When drafting an RFQ, consider including requirements for RoHS or REACH compliance, especially for applications in Europe or consumer-facing industries.
Finally, **packaging specifications** should be detailed. Standard packaging includes steel strapping, edge protection, and waterproof paper or plastic film. For long-distance or sea freight, wooden crates or pallets with moisture barriers are recommended to prevent rust and damage during transit.
Asia Metal Ltd, with its vertically integrated production lines and global logistics network, is well-positioned to handle complex RFQs with tight deadlines. Their 12-hour response policy ensures rapid feedback on feasibility, pricing, and delivery schedules—critical for time-sensitive projects. Whether sourcing standard Z275 galvanized coils or custom alloy-coated sheets, their technical team provides full traceability and quality assurance from melt to shipment.
In summary, a comprehensive RFQ for galvanized sheet should cover: base material grade, thickness and tolerances, coating type and weight, dimensions and format, surface finish, applicable standards, order quantity (tonnage), lead time, delivery terms, packaging, and required documentation. By providing clear, detailed specifications, buyers can receive competitive, accurate quotations and build stronger supplier relationships.
Taking the time to craft a thorough RFQ not only improves procurement efficiency but also ensures the final product meets performance, safety, and regulatory expectations—laying the foundation for long-term project success.