Aluminum-Zinc Coated Steel (GL)

We supply a full range of Aluzinc steel products, including Aluzinc for construction and home appliances. All products are sourced from well known steel mills.

SUMMARY
OVERVIEW

Property	Specification
Thickness	0.12mm – 3.0mm
Aluminum-Zinc Coating Thickness	50 – 150 g/m²
Inner Coil Dia.	508mm or 610mm
Width	900 – 1500mm
Zinc Spangle	Regular Spangle, Large Spangle, Small Spangle, Zero Spangle
Surface	Bright, Oiled, Passivated, Anti-Fingerprint
Standard	GB, ASTM, EN, JIS etc.
Grades	DX51D+AZ, DX52D+AZ, CS Type A/B, FS, SS Grade 33/37/50/80, SGLCC, SGLCD1/2/3 etc.

Introduction

Aluzinc coils are steel products with an aluminum-zinc alloy coating on the surface. This product combines the excellent properties of aluminum and zinc, offering enhanced corrosion resistance, thermal stability, and high oxidation resistance. As a result, it is widely used in industries requiring high corrosion resistance and aesthetic quality. Aluzinc coils are particularly suitable for construction, home appliances, and automotive applications, demonstrating superior corrosion resistance, especially in high-temperature or humid environments.

What Are Aluzinc Coils

Aluzinc coils are steel products coated with an aluminum-zinc alloy to enhance corrosion resistance, high-temperature performance, and oxidation resistance. The aluminum-zinc alloy typically contains approximately 55% aluminum, 43.4% zinc, and a small amount of silicon. This alloy layer provides dual protection: the aluminum layer effectively resists high-temperature oxidation, while the zinc layer prevents corrosion.

Compared to traditional galvanized steel, aluzinc steel offers superior resistance to high temperatures, oxidation, and corrosion, making it more suitable for applications exposed to extreme environments over extended periods.

Production Process of Aluzinc Coils

The production of aluzinc coils involves a hot-dip coating process, where the steel sheet is immersed in a molten aluminum-zinc alloy to form a protective coating. The key steps include:

Substrate Preparation: Cleaning, pickling, and annealing to ensure a clean and smooth surface.
Coating Deposition: Applying the aluminum-zinc alloy layer onto the steel sheet through the hot-dip process.
Post-Treatment: Processes such as passivation, oiling, or anti-fingerprint coating to enhance corrosion resistance, workability, and other specific properties.

Classification of Aluzinc Steels

Aluzinc sheets are primarily classified based on their application, including: Construction Aluzinc Sheets, Home Appliance Aluzinc Sheets.

Standards for Aluzinc Steels

Chinese Standard:
- GB/T 2518 – Covers requirements for hot-dip Aluzinc steel sheets and coils, including coating thickness, mechanical properties, and corrosion resistance.
American Standard:
- ASTM A792/A792M – Specifies the requirements for hot-dip Aluzinc steel sheets, including chemical composition, mechanical properties, and coating thickness.
European Standard:
- EN 10346 – Defines production requirements for hot-dip Aluzinc steel sheets, covering coating thickness and mechanical properties.
Japanese Standard:
- JIS G 3321 – Japanese standard for hot-dip Aluzinc steel coils, addressing coating thickness, surface quality, and inspection methods.

Applications of Aluzinc Steels

Construction: Roofing, walls, canopies, etc.
Home Appliances: Water heaters, air conditioner casings, etc.
Energy: Solar panel substrates, power plant pipelines, etc.
Industrial Equipment: Chemical storage tanks, chimneys, etc.

Advantages of Aluzinc Steels

Advantages	Disadvantages
Higher corrosion resistance compared to galvanized steel coils	Slightly lower paint adhesion, requiring additional treatment
More suitable for energy-efficient buildings
Better high-temperature resistance

Summary

Aluminum-zinc coated steel is a specialized steel product that combines the benefits of aluminum and zinc. By applying an aluminum-zinc alloy coating on the steel surface, it offers excellent corrosion resistance, heat resistance, and oxidation resistance. Its superior performance in high-temperature and harsh environments makes it an ideal anti-corrosion material for various industries.

Warehouses

Workability

HK Hantie’s laminated metal products are versatile in processing, offering capabilities such as deep drawing, steel sheet punching, V-bending, 180° bending, printing, CNC engraving, and custom requests.
We also provide cutting services for film-coated glass to meet customer needs.

Packing & Delivery

Export packaging or customized packaging as per customer requirements, with reinforced protection during shipment to ensure product stability.

FAQ

How do you ensure the quality of the steel?

We strictly select suppliers that meet the required standards and control the dimensional tolerances within the standard range. Mill’s testing certificate upon export will be provided to our customer. Additionally, at customer’s request, we can arrange third-party inspection and certificate of conformity will be issued.

What payment methods do you accept for steel orders?

For product orders, we accept payment methods such as L/C, T/T, and others.

Does your company keep stock of steel materials, and can customers order locally?

We maintain stock for commonly used materials, such as SA516 Gr70N, to ensure fast delivery. For specific grades and specifications, please consult us. In addition to our warehouse in China, we also have a warehouse in Vietnam, which enables us to provide fast delivery to nearby regions.

How can I avoid the impact of price fluctuations?

Steel, being a bulk commodity, is subject to frequent price fluctuations, which can affect customer cost control. For long-term agreement customers, we offer price locking options, with periods such as one quarter or one year.

Is there a minimum order quantity (MOQ)?

There is no MOQ for regular products. For agreement-based products, the minimum order will depend on the steel mill’s production schedule.

What is the process for handling quality disputes?

If customers find discrepancies between the received goods and the contract or technical agreement, they can raise the issue with us. After an initial review, we will submit a quality dispute to the steel mill. Both the steel mill and our representatives or a third-party inspector will verify the issue, and compensation will be provided once verified.

Relative Products

Read to learn more details?

The form has been submitted successfully!

There has been some error while submitting the form. Please verify all form fields again.