MIL-STD-1537C
FOREWORD
1. This test method standard is approved for use by all Departments and Agencies of the
Department of Defense.
2. An electrical conductivity measurement of an aluminum alloy determines its conductivity in ohm centimeters or in percent of the International Annealed Copper Standard (IACS) by comparison with certified conductivity standards. For a properly identified aluminum alloy, electrical conductivity measurement is a nondestructive method for verifying heat treatment. The electrical conductivity test used in conjunction with hardness testing makes it feasible to verify proper heat treatment.
3. Electrical conductivity in production part testing is measured by the eddy current method. Direct reading type eddy current instruments indicate conductivity in percent IACS (%IACS) and indirect type eddy current instruments are normally scaled in microamperes. To calibrate either of these types of eddy current instruments, certified non-ferrous conductivity standards are required.
4. Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document shall be addressed to ASC/ENOI, 2530 Loop Road West, Wright-Patterson Air Force Base, Ohio 45433-7101 by using Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.
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