# Skin depth reference data for common materials

Is there any well-regarded publication that gives values for skin depths of common metals (Al alloys, brasses, other engineering alloys) in the Hz-to-MHz frequency range? I am not an electrical engineer, perhaps there is someone here who knows such a source of reference data.

• Isn't it just a function of resistivity and frequency? I don't see why you'd need to tabulate it. Nov 27 '18 at 16:06
• OK, yes, resistivity and permabilities are tabulated. Thanks. Nov 27 '18 at 16:18
• Search on "skin depth calculator". The ones I found are all in the microwave region. This is fine if you're doing that work -- I was poking at some motor thing, so I was working in GHz/1000000 and getting answers in thousands of $\mu\mathrm{m}$, but I was able to translate. Nov 27 '18 at 16:28
• Standard thickness copper foil --- 1 ounce per square foot---- of 1.4 mils or 35micron thickness, has skin frequency of about 5 MHz. Given the squareroot in the math, 20MHz gives TWO depths, and with each depth giving ONE NEPER (8.7dB), you can expect 2*8.7 = 17.4 dB attenuation. Nov 27 '18 at 18:17
• upload.wikimedia.org/wikipedia/commons/thumb/f/f3/… Nov 27 '18 at 19:10