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BIS certification for steel used in electrically welded round link chains is essential to ensure that these materials meet the stringent quality and performance standards set by the Bureau of Indian Standards (BIS). This certification verifies that the steel possesses the necessary mechanical properties, such as tensile strength, toughness, and wear resistance, which are crucial for the safe and reliable performance of the chains in demanding applications. Adherence to BIS standards ensures product consistency, reliability, and safety, preventing potential failures that could lead to accidents or operational disruptions. BIS certification also fosters consumer confidence, supports regulatory compliance, and promotes industry best practices, ensuring that the steel used in manufacturing these chains meets the highest quality benchmarks necessary for critical industrial applications.

As per the latest Quality Control Order (QCO) issued by the Ministry of Steel, Government of India on 5th February 2024, steel used for electrically welded round link chains must conform to the Indian Standard IS 6967:1973. This standard outlines the essential requirements for the chemical composition, mechanical properties, and manufacturing processes of steel intended for such chains. Adherence to IS 6967:1973 ensures that the steel maintains adequate strength, toughness, and weldability necessary for the reliable performance of electrically welded round link chains in various industrial applications. Compliance with this standard is crucial to uphold safety standards, ensure product durability, and maintain the integrity of chains used in lifting and securing heavy loads across India.

The following are the major tests for Steel for electrically welded round link chains.

• 1. Manufacture
• 2. Freedom from Defects
• 3. Ladle Analysis
• 4. Product Analysis
• 5. Heat treatment
• 6. Hardenability
• 7. Grain size
• 8. Dimension and Tolerance