This thesis is based on a commission which was carried out in collaboration with CSI Nordic AB. The work was based on a client’s request to compare the material in two steel knife holders and through this analysis get a basis for their decision on which to choose.The thesis contains a theoretical explanation about different analysis techniques which will be used. The analysis techniques performed were, light optical microscopy, scanning electron microscopy, electron backscatter diffraction, tensile test, impact test and hardness measurement.The results show that the knife holders are composed of a very similar steel with the biggest difference in vanadium with 1 % more in Sample 1 than Sample 2. The hardness measurement show that Sample 1 is harder and the tensile test show that Sample 2 has longer elongation to fracture, but Sample 1 has higher ultimate tensile strength.To say which sample is better than the other is difficult. In some regards, like hardness, Sample 1 prevails but in ductility Sample 2 is better. Depending on what the knife holder will be used for and what the preferred properties are a decision can be made based on this thesis.