This paper analyses the weldable characteristics between congeneric metals and heterogeneous matals in details,aiming at the choice for electric locomotive air pipeline material.

• 针对电力机车空气管道材质的选择问题,详细分析了一些常用同种金属材料和异种金属材料的可焊性,并根据应用经验提出选材参考对象。