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Ｆｅ－１５Ｃｒ－４Ａｌ－Ｙ合金克服了ＦｅＣｒＡｌ合金的高温脆化和４７５℃脆性，热强性和冷加工性也明显改善，ＦｅＣｒＡｌ使用温度高，抗氧化性好等优点则得到保留。还研制了使用温度更高的Ｆｅ－２０Ｃｒ－４Ａｌ－Ｙ和Ｆｅ－２５Ｃｒ－４Ａｌ－Ｙ合金，形成了低脆性合金系列。加入强化元素能进一步提高合金的热强性，用轻稀土元素代替Ｙ则能降低生产成本。合金生产中的工艺困难已经解决，现已投入批量生产。合金用于电热、电阻元件，耐热结构件和耐高温涂层。用它代替Ｎｉ—Ｃｒ系合金可降低元件成本，提高其使用温度和服役寿命。
The Fe-15Cr-4Al-Y alloy overcomes the high temperature embrittlement and the brittleness at 475 ℃ of the FeCrAl alloy, and significantly improves the hot strength and cold workability. The FeCrAl has the advantages of high service temperature and good oxidation resistance. Fe-20Cr-4Al-Y and Fe-25Cr-4Al-Y alloys have also been developed at higher temperatures to form a series of low-friability alloys. Join the strengthening elements can further improve the thermal strength of the alloy, with light rare earth elements instead of Y can reduce production costs. Alloy production process difficulties have been resolved, is now put into mass production. Alloys are used for electrothermal, resistive elements, heat-resistant structural parts and high temperature resistant coatings. Use it instead of Ni-Cr alloy can reduce component costs and improve its service temperature and service life.