Metallurgical Testing’s covers Rockwell Hardness Testing’s HRA, HRB & HRC grades., Portable hardness Testing’s HL、HB、HRB、HRC、HRA、HV、HS Testing’s, Micro Vickers hardness Testing’s, Case depth Testing’s, Microstructure testing’s, Nitride layers, diffusion, compound ( white ), oxide layer testing’s, inclusion & grain size analysis