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LM124: What is the thermal conductivity of the leads? They are Iron and Nickel?

Ashley Reisig
Prodigy 10 points
Part Number: LM124

Hi,

I'm trying to find the thermal conductivity of the leads for the 7704302XA part. The lead material is listed as Iron~55% and Nickel ~45%. This looks to be Invar with around ~15 W/mC conductivity, but I want confirmation this is the case.