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MIL-STD-1537 Electrical Conductivity Test For Verification Of Heat Treatment Of Aluminum Alloys, Eddy Current MethodThis standard contains procedures for verifying aluminum alloy heat treatment by means of eddy current techniques, which measure electrical conductivity. Aluminum alloy heat treatment can be verified when electrical conductivity measurements are used in conjunction with hardness measurements.

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M1L-STD-1537C


NOTE:  Two different hardness conditions can provide the same conductivity reading in %1ACS. Use hardness to verify condition.


Conductivity - %1ACS


NOTE:  Figure 2 is a typical curve for information purposes only and shall not be used for acceptance or rejection.


Figure 2. Hardness vs. Conductivity for 7075 Aluminum Alloy.


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