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Hi all, Anybody know what powders are good for magnetic brake application? Does it have to be of stainless steel for temperaure and corrosion resistances? Does particle size matter to high full-field torque and low no-field drag torque? Which is better, small (10s micro) or large (100s micro)?

Thank Mike and ED. Our indirect measurement from inductance data seems suggest less than 100 in 1 Oe range.

Magmike, Thank you very much for your response. The Chemical composition of H13: 0.41%C, 5.35%Cr,1.4%Mo, 0.35%Mn, 1.0%Si, 0.90%V, balance Iron. How much permeability might be guessed per the compositions?

Hi all, The tool steel H13 is a Fully Magnetic material. But no magnetic properties data could be found. Any body has used it in magnetic design? What are the permeability and B-H curve. Thank you in advance for any inputs. Key