An　as-cast　chromium　white　cast　iron　alloy　with　chromium　(Cr)　content　of　0　wt%,　1　wt%,　2　wt%,　3　wt%,　and　4　wt%　was　prepared　via　metallurgical　smelting　and　casting　processes.　The　effects　of　Cr　content　on　the　toughness,　hardness,　and　microstructure　of　(Fe,　Cr)3C　carbides　was　evaluated.　The　results　revealed　that　the　microstructure　of　the　as-cast　alloys　is　mainly　composed　of　bulk　carbide　and　the　pearlite　matrix.　The　carbide　in　the　alloy　without　added　Cr,　i.e.,　eutectic　Fe3C,　was　characterized　by　a　continuous　network　structure.　With　the　addition　of　Cr　atoms,　the　Fe3C-type　carbide　was　transformed　into　(Fe,　Cr)3C,　leading　to　a　gradual　increase　in　the　fracture　toughness　of　the　carbide.　This　may　have　resulted　from　the　incorporation　of　Cr　into　Fe3C　and　the　consequent　crystal-structure　transformation　of　the　carbide.　When　the　Cr　content　of　the　carbide　was　lower　than　the　saturation　level　(　©　2020　Elsevier　B.V.