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Ｍｏ对改善Ｆｅ２Ａｌ的高温力学性能有十分重要的作用。在Ｆｅ－２８Ａｌ－５Ｃｒ合金中，Ｍｏ的溶解度在１％（ｍｏｌ／ｍｏｌ）左右。Ｍｏ含量超过１％时，基体中有富Ｍｏ的第二相颗粒形成。Ｍｏ的加入提高了合金的室温和高温强度，改善了抗蠕变性能，并使Ｆｅ３Ａｌ的屈服强度和温度反常关系中的强度峰向高温方向移动。但是Ｍｏ加入Ｆｅ３Ａｌ后导致塑性降低，并提高了合金的脆性转变温度，这对热形变加工带来不利的影响。
Mo plays a very important role in improving the high-temperature mechanical properties of Fe2Al. In Fe-28Al-5Cr alloy, the solubility of Mo is about 1% (mol / mol). When the Mo content exceeds 1%, Mo-rich second-phase particles are formed in the matrix. The addition of Mo improves the room temperature and high temperature strength of the alloy, improves the creep resistance, and shifts the intensity peak of the Fe3Al yield strength and the temperature anomaly to the high temperature. However, the addition of Mo to Fe3Al results in a decrease in ductility and an increase in the brittle transition temperature of the alloy, which adversely affects the thermal deformation process.