為便于合金(jin)材料(liao)的使用(yong)，世界各國(guo)均(jun)根據本國(guo)的實際情況(kuang)對合金(jin)材料(liao)依(yi)據其所具有的物理性(xing)(xing)(xing)(xing)(xing)(xing)能(如比重(zhong)、熔點、導電性(xing)(xing)(xing)(xing)(xing)(xing)、導熱性(xing)(xing)(xing)(xing)(xing)(xing)、熱膨脹(zhang)性(xing)(xing)(xing)(xing)(xing)(xing)、磁性(xing)(xing)(xing)(xing)(xing)(xing)等)、化(hua)學(xue)性(xing)(xing)(xing)(xing)(xing)(xing)能(耐用(yong)腐蝕性(xing)(xing)(xing)(xing)(xing)(xing)、抗氧(yang)化(hua)性(xing)(xing)(xing)(xing)(xing)(xing))，力(li)學(xue)性(xing)(xing)(xing)(xing)(xing)(xing)能(機械性(xing)(xing)(xing)(xing)(xing)(xing)能)制定了符合本國(guo)實際應用(yong)的合金(jin)牌號(hao)。在實際應用(yong)中，設(she)計師只(zhi)需要根據設(she)計需要選用(yong)適當牌號(hao)的合金(jin)材料(liao)即(ji)可。