BS EN ISO 22826:2021 - Destructive Tests on Welds in Metallic Materials

Welcome to the comprehensive guide on the BS EN ISO 22826:2021 standard, a pivotal document for professionals in the field of metallurgy and welding. This standard is essential for those involved in the testing and quality assurance of welded joints, particularly those created using advanced techniques such as laser and electron beam welding.

Overview

The BS EN ISO 22826:2021 standard provides detailed methodologies for conducting destructive tests on welds in metallic materials. It focuses specifically on the hardness testing of narrow joints welded by laser and electron beam, utilizing the Vickers and Knoop hardness tests. This standard is crucial for ensuring the integrity and durability of welded joints, which are often subjected to extreme conditions in various industrial applications.

Key Features

• Standard Number: BS EN ISO 22826:2021
• Pages: 26
• Release Date: March 15, 2021
• ISBN: 978 0 539 15016 2
• Status: Standard

Importance of Hardness Testing

Hardness testing is a critical component in the evaluation of welded joints. It provides valuable insights into the mechanical properties of the weld, such as its strength, ductility, and resistance to wear and deformation. The BS EN ISO 22826:2021 standard outlines the procedures for conducting Vickers and Knoop hardness tests, which are widely recognized for their precision and reliability.

Vickers Hardness Test

The Vickers hardness test is a versatile method that can be used on a wide range of materials. It involves pressing a diamond indenter into the surface of the material under a specific load and measuring the size of the indentation. This test is particularly useful for assessing the hardness of thin sections and small areas, making it ideal for narrow welded joints.

Knoop Hardness Test

The Knoop hardness test is similar to the Vickers test but uses an elongated diamond indenter. This test is especially suited for brittle materials and thin coatings, as it produces a smaller indentation with less penetration depth. The Knoop test is an excellent choice for evaluating the hardness of delicate or intricate welds.

Applications

The BS EN ISO 22826:2021 standard is applicable across a wide range of industries, including aerospace, automotive, and manufacturing. It is particularly relevant for sectors where high precision and reliability of welded joints are paramount. By adhering to this standard, organizations can ensure that their welded products meet the highest quality and safety standards.

Benefits of Compliance

Compliance with the BS EN ISO 22826:2021 standard offers numerous benefits, including:

• Enhanced Quality Control: By following the standardized testing procedures, organizations can achieve consistent and reliable results, leading to improved product quality.
• Increased Safety: Ensuring the integrity of welded joints reduces the risk of failures, enhancing the safety of products and systems.
• Competitive Advantage: Adhering to international standards demonstrates a commitment to quality and excellence, providing a competitive edge in the marketplace.
• Regulatory Compliance: Many industries require compliance with specific standards as part of their regulatory framework. Meeting these requirements can facilitate market access and reduce legal risks.

Conclusion

The BS EN ISO 22826:2021 standard is an indispensable resource for professionals involved in the testing and evaluation of welded joints. By providing clear guidelines for hardness testing using the Vickers and Knoop methods, this standard ensures that welded products meet the highest standards of quality and safety. Whether you are in the aerospace, automotive, or manufacturing industry, adhering to this standard can significantly enhance your quality assurance processes and product reliability.

Invest in the BS EN ISO 22826:2021 standard today to ensure your welded joints are tested to the highest standards, providing peace of mind and confidence in your products' performance and durability.

BS EN ISO 22826:2021

This standard BS EN ISO 22826:2021 Destructive tests on welds in metallic materials. Hardness testing of narrow joints welded by laser and electron beam (Vickers and Knoop hardness tests) is classified in these ICS categories:

• 25.160.40 Welded joints and welds
• 25.160.30 Welding equipment

This International Standard specifies the requirements for hardness testing of transverse sections of narrow laser and electron beam welded joints in metallic materials. It covers Vickers and Knoop hardness tests in accordance with ISO 6507‑1 and ISO 4545, respectively, with test forces of 0,098 N to just under 98 N (HV 0,01 to just under HV 10) for the Vickers hardness test and test forces up to and including 9,8 N (just under HK 1) for the Knoop hardness test.

This International Standard is applicable to welds made with or without filler wire. It may not be applicable to the testing of wider hybrid laser/arc welds.

International Standards for hardness testing of welds without a narrow profile are ISO 9015‑1 and ISO 9015‑2.