Samples of steel pipes and pipe segments were subject to multiple impacts by direct reduced iron pellets, exposed to hydrogen and carbon monoxide gas mixtures, at temperatures ranging from 300 to 600 degrees C. Material loss and microscopic observations were used to evaluate wear. The results are useful for material selection and preventative maintenance planning. Erosion wear was the important mechanism. Comparison between laboratory test and pilot plant was made and their analysis used to provide predictions of wear rates.