Sn-PLATED COPPER ALLOY BAR HAVING EXCELLENT FATIGUE CHARACTERISTICS

摘要

Disclosed is an Sn-plated copper alloy bar having good fatigue characteristics wherein deterioration of fatigue characteristics due to Sn plating is prevented. In a copper alloy bar which is provided with an Sn or Sn alloy plating film by electroplating or reflow processing, fatigue characteristics are improved by setting the average hydrogen concentration at about 2 mass ppm or less.