Abstract This paper presents some micromechanical and macromechanical test data for steel fiber reinforced concrete at normal (22°C) and at low (−50°C) temperatures. Micromechanical tests were in the form of fiber pull-out tests with the fiber aligned in the direction of the applied pull-out load. In the macromechanical tests, steel fiber reinforced concrete beams were loaded at triple points (4-point loading). Two levels of matrix strength, normal and high, were investigated. Strengths in all cases were higher at −50°C than at 22°C. Toughness at −50°C, on the other hand, was marginally reduced for composites with a normal strength matrix and drastically reduced for those with a high strength matrix. normal strength matrix and drastically reduced for those with a high strength matrix.