Dear experts,
We have copper tube as per BS EN 1057 of R290 hard material. While establishing brazing procedure for Lap joint, tensile strength results are 240 Mpa to 260 Mpa (fracture in parent metal). As per sec. IX, QB 153 "the specimen shall have a minimum tensile strength that is not less than the specified minimum tensile strength of the base metal ( 290 Mpa) in the annealed condition.
My question is acceptance crieteria of tensile strength as material is hard and after brazing ( somewhat Annealed), we have to refer same as base metal tensile strength or any relaxation for annealed criteria. Any reference of code if available it will help to clear BPS.
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