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What is the difference between weld decay and knife line attack?

April 26, 2017Attack decay difference Knife line weld

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What is the difference between weld decay and knife line attack?

1 Answer

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There are two major differences: (1) materials – weld decay occurs to normal, un-stabilized steels while knife line attack occurs to stabilized steels; (2) location of attack – weld decay occurs in the heat affected zone (HAZ) while knife line attack is located at the fusion line.