Should the weld reinforcement be removed before testing?

Yes, both sides of the weld should be machined flush with the surface of the parent metal to prevent stress risers.

What happens if the specimen breaks in the parent metal?

If it breaks in the parent metal and meets minimum parent metal strength requirements, the weld joint is generally considered acceptable.

What code governs the operation of the tensile testing machine?

The general principles for tensile testing of metallic materials as per IS 1608 apply.

IS 3600 Part 1

: 1982

Methods of Testing of Fusion Welded Joints and Weld Metal - Part 1: Tensile Testing of Butt Welds

CurrentSpecializedTesting MethodMaterials Science · Steel and Reinforcement

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This part of the standard covers the method of transverse tensile testing of fusion welded butt joints to determine their tensile strength. It provides guidelines on specimen extraction, preparation, and the testing procedure to ensure weld joint integrity.

Specifies the method for tensile testing of fusion welded butt joints and weld metal.

Quick Reference Values

Test temperature10°C to 35°C (Ambient)

Specimen orientationTransverse to the welded joint

Weld reinforcement removalMachined flush with the parent metal

Thickness measurement accuracy± 0.01 mm

Key Formulas

Rm = Fm / So — Tensile Strength = Maximum Load / Original Cross-sectional Area

Practical Notes

Test specimens must be extracted transversely to the weld direction without altering the metallurgical properties of the joint.

Weld reinforcement is typically machined flush with the parent metal to prevent stress concentrations during testing.

The location of fracture (weld metal, HAZ, or parent metal) must be meticulously recorded alongside the ultimate tensile strength.