The isothermal section of Al-Cr-Si system at 700 degrees C was determined by means of scanning electron microscopy coupled with energy dispersive X-ray spectroscopy and X-ray powder diffraction. In the 700 degrees C isothermal section, fourteen three-phase regions exist, three ternary compound named tau(1), tau(2) and tau(3) are confirmed to be stable and the Al-11 Cr-2 phase is not observed in this section. The solubility of Si in AlCr2 is relatively low in the Al-Cr-Si system, but the CrSi2 phase possesses a relatively high solubility of Al. The maximum Al solubility in CrSi2, CrSi and Cr5Si3 at 700 degrees C reaches 25.9, 3.5 and 9.0 at.%, respectively. (C) 2013 Elsevier B.V. All rights reserved.