表1-56常用金屬元素性能表名稱元素符號密度g/cm3熔點℃線膨脹系數(shù)1/℃導(dǎo)電率%抗拉強度σbMPa伸長率σ%收縮率%布氏硬度HB色澤銀鋁金鈹鉍AgAlAuBeBi10.492.7019.321.859.8960.5660.210631285271.20.00001890.00002360.00001420.00001150.00001341006071271.418080~ (共 1006 字) [閱讀本文] >>
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 表1-56常用金屬元素性能表名稱元素符號密度g/cm3熔點℃線膨脹系數(shù)1/℃導(dǎo)電率%抗拉強度σbMPa伸長率σ%收縮率%布氏硬度HB色澤銀鋁金鈹鉍AgAlAuBeBi10.492.7019.321.859.8960.5660.210631285271.20.00001890.00002360.00001420.00001150.00001341006071271.418080~ (共 1006 字) [閱讀本文] >>