In the SEM photographs in Fig. 3a and d is the aspect of adhesion of both coating system thicknesses over non nitrided H13. The cracks around the indentations in both samples indicate a poor adhesion due to low load bearing capacity of the non nitrided substrates. The SEM photographs in Fig. 3b and e show the adhesion of both coating system thicknesses over nitrided case A. While Fig. 3c and f shows the adhesion of both TiAlN/TiN coating system thicknesses over case B. According to HF patterns it is possible to classify both coating system over nitrided substrates specimens as been either HF1 or HF2 which would be classified as an acceptable adhesion. According to HF patterns in both HF1 and HF2 mostly of the failure mode is cohesive [12].