3.3 Magnetic Finite Element Analysis: Infolytica MagNet6 FEA software was used for the magnetic finite element modeling in this study. This software allows for 3D, non-linear, anisotropic FEA calculations with user- supplied magnetization functions. NdFeB magnets with a coercivity of 1.6x106 A/m were used to magnetize the steel plate in the x direction. This magnetization level produces a flux density of about 1.8T in the sample, this corresponds to a high magnetization level during an actual MFL inspection. Four fold symmetry allows the use of a quarter model, which is shown schematically in Figure 9.