方型镀锡铜包钢线技术条件 截面尺寸
a×a(mm)允许偏差(mm)对角线长度(mm)允许偏差(mm)抗拉强度(Kg/mm2)延伸率(%)弯曲次数(次)0.40×0.40±0.0050.520±0.01≥802≥30.45×0.45±0.0050.580±0.01≥802≥30.50×0.50±0.0050.655±0.01≥802≥30.55×0.55±0.0050.707±0.01≥802≥30.60×0.60±0.0050.810±0.01≥752≥30.64×0.64±0.0050.860±0.01≥702≥30.70×0.70±0.0050.940±0.01≥682≥30.75×0.75±0.0050.990±0.01≥652≥30.80×0.80±0.0051.080±0.01≥652≥30.90×0.90±0.0051.210±0.01≥602≥31.00×1.00±0.0051.360±0.01≥602≥3  截面尺寸
a×a(mm)锡层厚度(um)导电率(%)耐温测试170±5℃ 4小时焊锡测试250±5℃ 2-3秒0.40×0.406-8≥25OK合格0.45×0.456-8≥25OK合格0.50×0.506-8≥25OK合格0.55×0.556-8≥25OK合格0.60×0.606-8≥25OK合格0.64×0.646-8≥25OK合格0.70×0.706-8≥25OK合格0.75×0.756-8≥25OK合格0.80×0.806-8≥25OK合格0.90×0.906-8≥25OK合格1.00×1.006-8≥25OK合格