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1991 Edition, June 1, 1991

Complete Document

Report on Electrical Conductivity in Heat Treated Aluminum Alloy Plate

Includes all amendments and changes through Reprint , June 1, 1991

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Active, Most Current

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Product Details:

  • Revision: 1991 Edition, June 1, 1991
  • Published Date: June 1, 1991
  • Status: Active, Most Current
  • Document Language: English
  • Published By: Aluminum Association (AA)
  • Page Count: 28
  • ANSI Approved: No
  • DoD Adopted: No

Description / Abstract:

This paper discusses the value and the limitations of using electrical conductivity for monitoring the strength of aluminum alloy plate. The variation of conductivity and mechanical properties with quench rate is detailed and the process for distinguishing metal with a marginal quench from metal with a good quench is described.

The factors which influence conductivity other than quench rates are also discussed. These factors include lot-to-lot variations in chemistry and laboratory-to-laboratory variations in test methods and test equipment. Because of these variations, it is concluded that conductivity is an excellent tool for in-process quality control where one operator using one instrument can check the conductivity of one piece of plate for differences which may indicate differences in quench rate. It is not, however, an effective acceptance test because of the large errors which can be introduced into the measurements. The final referee for metal integrity must remain the mechanical property tests.

This report was originally published on October 1, 1982.