1.Specifies the procedure for macro and micro examination of welded joints to check the soundness of the joint.
1.1 The macro examination is conducted for revealing certain aspects of the quality of the joint by subjecting it to the corrosive action of an etchant and examining visually or sometimes at a low magnification (usually 10 diameters or less ). The micro examination is conducted to study the micro structure at different zones at a magnification generally not less 100 diameters.
IS 3600 Pt.9-1985 history
1986IS 3600 Pt.9-1985 Test methods for fusion joints and weld metal in steel Part 9 Macroscopic and microscopic examination