Can any one will help to find a commercial test house who can test following magnetic properties of a stainess steel bar of AISI 430 bar diameters range 6-20.0mm
Saturation induction BS = 1,66
Relative magnetic permeability 1/4 r > 700
Residual induction Br = 0,5 - 0,8
Coercitive field strength Hc < 500 (A/m)
Although I can tell where you are located in the world, I will not divulge that information to the general public. Instead, I suggest that you let people at this forum know what country and city you are located in so the responses will be appropriate.
Another way of achieving your goal would be to discuss your requirement with a large testing laboratory in your city and see if they can recommend a specialized laboratory for this somewhere nearby or somewhere else in your country. I am confident that there are laboratories throughout your country with this capability.