en10346对应的国标

en10346对应的国标
EN 10346: Continuously hot-dip coated steel flat products - Technical delivery conditions
Introduction:
EN 10346 is a European standard that specifies the requirements for continuously hot-dip coated steel flat products for cold forming. This standard aims to provide technical delivery conditions for steel products that are coated with zinc, zinc-iron alloy, zinc-aluminium alloy, aluminium-zinc alloy or aluminium-silicon alloy.
Scope:
EN 10346 applies to steel products that are coated by a continuous hot-dip process and intended for use in various applications, including construction, automotive, appliances, and general engineering. The standard covers a wide range of steel grades and coating types, providing flexibility for different requirements.
Coating types:
EN 10346 specifies several coating types that can be applied to the steel products. These include:
1. Zinc coating (Z): This is the most common type of coating used in the industry. It provides good corrosion resistance and is suitable for general applications.
2. Zinc-iron alloy coating (ZF): This coating offers improved corrosion resistance compared to pure zinc coating. It is often used in demanding environments.
3. Zinc-aluminium alloy coating (ZA): This coating provides excellent corrosion resistance and heat reflectivity. It is commonly used in roofing and cladding applications.
4. Aluminium-zinc alloy coating (AZ): This coating offers superior corrosion resistance and is suitable for outdoor applications.
5. Aluminium-silicon alloy coating (AS): This coating is commonly used in electrical applications due to its excellent heat resistance and electrical conductivity.
Mechanical properties:
EN 10346 specifies the mechanical properties of the coated steel products, including yield strength, tensile strength, elongation, and hardness. These properties ensure that the steel products meet the required performance criteria for their intended applications.
Surface quality:
The standard also specifies the surface quality requirements for the coated steel products. This includes the appearance, roughness, and absence of defects such as cracks, scratches, or delamination. The surface quality is important for achieving a visually appealing and durable finish.
Dimensions and tolerances:
EN 10346 provides guidelines for the dimensions and tolerances of the coated steel products. This ensures that the products meet the required dimensional accuracy and fitment for their intended applications. The standard covers various dimensions, including thickness, width, and length.
Testing and certification:
EN 10346 requires that the coated steel products undergo various tests to ensure their conformity to the specified requirements. These tests include coating adhesion, corrosion resistance, mechanical properties, and surface quality. Manufacturers are also required to provide a declaration of performance and a CE marking, demonstrating compliance with the standard.
Conclusion:
EN 10346 is a comprehensive standard that defines the technical delivery conditions for continuously hot-dip coated steel flat products. It provides guidelines for the coating types, mechanical properties, surface quality, dimensions, and testing requirements. Compliance with this standard ensures that the coated steel products meet the necessary performance criteria and are suitable for their intended applications.。