What is BS EN 10346:

Introduction

BS EN 10346 is a European standard that provides specifications for continuously hot-dip coated steel flat products, mainly used in construction, appliances, automotive, and packaging industries. This standard defines the requirements of steels with high yield strength for cold forming, with zinc or zinc-iron alloy coatings.

Key Features of BS EN 10346

1. Coating Types: There are different coating types specified in BS EN 10346. The standard covers various options including pure zinc coating (Z), zinc-iron alloy coating (ZF), zinc-aluminum alloy coating (ZA), and zinc-magnesium alloy coating (ZM). Each type has its own characteristics and advantages depending on the specific application.

2. Steel Grades: BS EN 10346 covers a wide range of steel grades classified according to their yield strength. These grades include DX51D, S220GD, S550GD, and many more. The choice of steel grade depends on factors such as the required mechanical properties, thickness, and intended use of the product.

3. Mechanical Properties: The standard specifies the minimum values for tensile strength, elongation, and yield strength of the coated steels. These properties determine the performance and suitability of the material for different applications. Compliance with these requirements ensures the reliability and quality of the finished product.

4. Surface Quality: BS EN 10346 defines the visual appearance and surface quality of the coated steel products. It sets standards for surface defects, such as blisters, cracks, and peeling. These parameters ensure that the final product meets the aesthetic requirements and performs well in terms of durability and corrosion resistance.

5. Test Methods: The standard also outlines the test methods for evaluating the properties of the coated steels. These tests include measurements of coating thickness, adhesion, and corrosion resistance. The results obtained from these tests help manufacturers assess the quality of their products and ensure they meet the defined specifications.

Benefits and Applications

BS EN 10346 provides a benchmark for the production of high-quality coated steel flat products. The use of this standard offers several benefits, such as:

1. Enhanced Corrosion Protection: The zinc or zinc alloy coatings specified in BS EN 10346 provide excellent corrosion resistance, thus prolonging the lifespan of the steel products. This makes them suitable for outdoor applications exposed to harsh weather conditions.

2. Improved Aesthetic Appeal: The standard ensures a consistent and visually appealing surface finish, free from defects. Coated steel products manufactured in compliance with BS EN 10346 are often used in architectural applications where aesthetics play a significant role.

3. Wide Range of Applications: The versatility of BS EN 10346 compliant coated steels makes them suitable for a broad range of applications. From construction materials, such as roofing and cladding, to automotive components and household appliances, these products find extensive use across various industries.

In conclusion, BS EN 10346 is a crucial standard that defines the requirements for continuously hot-dip coated steel flat products. The standard ensures the quality, performance, and reliability of these products by specifying coating types, steel grades, mechanical properties, surface quality, and test methods. Manufacturers and consumers alike benefit from using BS EN 10346 compliant coated steels due to their enhanced corrosion protection, improved aesthetic appeal, and versatile applications.