This paper deals with the mechanical properties of concrete with steel fibers subjected to temperatures up to 500°C. Now a day concrete are being used extensively in the construction that might be subjected to elevated temperatures. The behavior of concrete structures at elevated temperatures is of significant importance in predicting the safety of structures in response to certain accidents or particular service conditions. Concrete mixes of M 50 have been designed along with steel fibers from 0.5-4% by weight of cement. Specimens were made and subjected at room temperature, 100, 200,300,400 and 500 °C. Compressive strength were determine and compare with value with regression analysis. This investigation developed some important data on the properties of concrete exposed to elevated temperatures up to 500°C.