ASTM A792M AZ150 Galvalume Steel Anti-Finger Print AS1397 G550 AFP Aluzinc Steel Coil Light Steel House Structural Steel

ASTM A792M AZ150 Galvalume Steel Anti-Finger Print

AS1397 G550 AFP Aluzinc Steel Coil Light Steel House Structural Steel

1. Introduction :

Aluminium zinc plating: AZ150 for short, aluminium zinc plating is galvanized corrosion 2-6 times, aluminium zinc plating keel long-term naked surface has no colour change, such as in the case of chemical corrosion, the surface of the physical reaction occurs on the surface of the keel to form a protective film of aluminium, so that the outside world of the chemical substances and the keel separated from the separation of the keel to protect the keel of the main body of the material, to prevent rusting.

G550 550Mpa 2.06X105 N/mm 2 7.85g/cm 3 1.2×10-5℃

The commonly used mechanical properties and physical parameters of G550 aluminium zinc plating are as follows:

Name Yield strength Modulus of elasticity Volume weight Coefficient of thermal expansion

G550 550Mpa 2.06X105 N/mm 2 7.85g/cm 3 1.2×10-5°C 

2. Standards for Aluminum-Zinc Coated Steel Coils

Aluminum-zinc coated steel coils are produced and tested according to several international and national standards to ensure quality, performance, and safety. Here are some of the primary standards that govern these products:

• International Standards

1. ASTM Standards (American Society for Testing and Materials)

- ASTM A792/A792M: This specification covers the requirements for aluminum-zinc alloy-coated steel sheet in coils and cut lengths. It includes details about the coating composition, mechanical properties, and testing methods.

- ASTM A875/A875M: This standard covers steel sheet, 55% aluminum-zinc alloy-coated by the hot-dip process, intended for applications requiring corrosion resistance.

2. ISO Standards (International Organization for Standardization)

- ISO 9364: Specifies the requirements for continuously hot-dip aluminum-zinc alloy-coated steel sheet and strip.

• National Standards

1. JIS Standards (Japanese Industrial Standards)

- JIS G 3321: Covers aluminum-zinc alloy-coated steel sheets and strips. This standard specifies the types of products, dimensions, shapes, mass, and mechanical properties, as well as test methods and inspection rules.

2. EN Standards (European Norms)

- EN 10346: This standard specifies the requirements for continuously hot-dip coated steel flat products, including aluminum-zinc coatings. It covers properties such as the coating thickness, adhesion, and mechanical properties.

3. GB Standards (Chinese National Standards)

- GB/T 14978: This standard pertains to hot-dip aluminum-zinc alloy-coated steel sheets and strips, specifying the material's chemical composition, mechanical properties, and coating requirements.

• Common Requirements Across Standards

1. Coating Composition

- The typical composition of the aluminum-zinc coating is about 55% aluminum, 43.4% zinc, and 1.6% silicon. This combination offers superior corrosion resistance and heat reflectivity.

2. Coating Weight

- Standards specify the minimum and maximum coating weights, often measured in grams per square meter (g/m²). Common coating weights include AZ50, AZ100, and AZ150, where the number indicates the total coating weight on both sides of the sheet.

3. Mechanical Properties

- These include tensile strength, yield strength, and elongation. The mechanical properties ensure that the steel can withstand various structural demands without failure.

4. Surface Quality and Appearance

- Standards often define the acceptable levels of surface defects, such as blemishes, scratches, and coating uniformity, ensuring the material meets aesthetic and functional requirements.

5. Dimensional Tolerances

- Specifications include tolerances for thickness, width, and flatness to ensure consistency and compatibility in various applications.

6. Testing and Inspection Methods

- Standards outline methods for testing coating adhesion, corrosion resistance, mechanical properties, and other critical characteristics. These tests ensure the product meets the required performance criteria.

• Conclusion

Aluminum-zinc coated steel coils adhere to rigorous international and national standards to ensure high quality and reliability. Standards like ASTM, ISO, JIS, EN, and GB set comprehensive guidelines for coating composition, mechanical properties, surface quality, and testing methods. Adherence to these standards ensures that aluminum-zinc coated steel coils provide superior performance in various applications, particularly in construction and infrastructure projects.

3. Characteristics:

• Corrosion resistance: zinc is chemically active, in the air at room temperature, the surface generates a thin and dense layer of alkaline zinc carbonate film, which can prevent further oxidation, and aluminium in the air, can form a layer of insoluble oxides, in which the barrier protection function.
• Heat Resistant: Aluminium zinc plated sheets can be used in high temperature environments up to 315 degrees.
• Reflectivity: Aluminium-zinc coated sheets are highly reflective, with a heat reflectivity almost twice that of galvanised steel, making them ideal for use on steel metal roofs to achieve energy savings.
• Easy to paint: Aluminium-zinc-plated sheets from aluminium-zinc-plated sheet manufacturers have excellent adhesion between the sheet and the paint and can be painted without pre-treatment or weathering.
• The coating adhesion of the aluminium-zinc plating layer is relatively good, so it can be applied directly to advertising boards and general-purpose boards without pre-treatment such as weathering.

4. Specifications 

1) Standard: ASTM A792M, AS1397, EN10346/ EN10143 all according to the customer's request
2) Grade: SGCC, CS-Type B, Grade 350, G550, Grade 50, Grade 80, SS550GD, all according to the customer's request

3) Capacity: about 20000 tons per month

4) Thickness: from 0.13mm to 2mm, all available
5) Width: from 600mm to 1250mm, regular size:750-762mm,900-914mm,1000mm,1200mm,1219-1250mm all available
6) Coil ID: 508mm
7) Coil weight: from 2-10MT, according to the customer's request

8) Zinc coating weight: AZ30~AZ165g/m2

9) Spangle: regular spangle,big spangle, small spangle
10) Surface treatment: Anti-finger print (Green, Blue, Golden, No color) Chemical passivating, oils, passivating oils,skin passed
11) Edge: mill edge, cut edge
12) Min trial order 25 ton each thickness

Application: 

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