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论述了地铁客车转向架焊接构架用材的选择准则，并对现用的Ст．２０号钢和０９Г２Д号钢和新钢种Ст．１０Г２БД号钢用于构架的效果进行了试验比较。得出：在非对称循环系数大的情况下采用СтＣ．１０Г２БД号钢是有发展前途的。
Discusses the selection criteria of the material for the welding frame of the subway passenger car bogie, and on the current Ст. 20 steel and 09Г2Д steel and new steel Ст. The effect of 10Г2БД steel on the structure was tested and compared. It is concluded that СтC is used in the case of large asymmetric coefficient of circulation. 10Г2БД steel is promising.