Thank you for the replies.
So, this isn't a standard measurement, in fact no one does it. What we are looking to do is get some data on our metal without having to invest in expensive equipment. We want to eventually get a spectrometer and an micro-ohm meter but it isn't in the budget, so...
I think it may help you out to know I am an industrial engineer working for a foundry.
My main reason for this effort is that I need to be able to compare our metal to industry standards. Especially since we aren't using straight A356.2 ingots in our batches anymore, we are recycling old...
I will be using a 4 point method to measure this and I have several multimeters and an oscilloscope on hand to play with.
I am trying to use tensile bars that we already have made instead of tooling a whole new bar for resistivity experimentation. If this proves to be a reasonably consistent...
I'm trying to measure the resistivity of a sample of A356 to back out the thermal conductivity. I do not have anything sensitive enough to measure the micro-ohm resistance (my sample is 0.5" x 0.25" x 3").
If I want to use an oscilloscope or multimeter to measure the voltage drop, I should...