Metallic materials. Method of test for the determination of quasistatic fracture toughness of weldsBS EN ISO 15653: 2010 Metallic materials. Method of test for the determination of quasistatic fracture toughness of welds BS EN ISO 15653 is an international Standard which specifies methods for determining fracture toughness in terms of: K (stress intensity factor) (crack tip opening displacement, CTOD) and J (experimental equivalent of the J integral) for welds in metallic materials. BS EN ISO 15653 is complementary to BS EN ISO 12135, which covers

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1 Test specimens

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1 Material requirements

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