MIL-STD-1537 Revision C:2002
Current
The latest, up-to-date edition.
Electrical Conductivity Test for Verification of Heat Treatment of Aluminum Alloys, Eddy Current Method
25-06-2002
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1 SCOPE
1.1 Scope
2 APPLICABLE DOCUMENTS
2.1 General
2.2 NonGovernment publications
2.3 Order of precedence
3 DEFINITIONS
3.1 Volume resistivity
3.2 Conductivity
3.3 Percent IACS (International Annealed Copper Standard)
3.4 Eddy current instrument
3.5 Probe
3.6 Nonferrous conductivity standards
3.7 Standard depth of penetration
3.7.1 English Units
3.7.2 Metric Units
3.8 Liftoff effect
3.9 Direct reading eddy current instrument
3.10 Indirect reading eddy current instrument
4 GENERAL REQUIREMENTS
4.1 Equipment
4.1.1 Instruments
4.1.2 Instrument sensitivity
4.1.3 Instrument accuracy
4.2 Standards
4.2.1 Laboratory conductivity standards
4.2.2 Instrument conductivity standards
4.3 Calibration and standardization
4.3.1 Standardization
4.3.1.1 Standardization frequency
4.3.1.2 Liftoff effect
4.3.2 Laboratory calibration
4.4 Test article
4.4.1 Surface
4.4.2 Edge effect
4.4.2.1 Curvature correction factor
4.4.3 Sample thickness
4.4.3.1 Thin specimens
4.4.4 Clad Specimens
4.4.5 Alclad specimens
4.5 Personnel qualification
4.5.1 Direct reading instruments
4.5.2 Indirect reading instruments
5 DETAIL REQUIREMENTS
5.1 Procedure
5.1.1 Hardness tests
5.1.2 Conductivity tests
5.1.2.1 Acceptable mechanical properties
5.1.3 Correction factors for conductivity readings
on round stock
5.1.4 Liftoff correction factors
5.1.5 Operating precautions
5.2 Conductivity requirements
6 NOTES
6.1 Intended use
6.2 Issue of DoDISS
6.3 Subject term (key word) listings
6.4 Report of results
6.5 Changes from previous issues
Outlines ways of verifying aluminum alloy heat treatment using eddy current methods which measure electrical conductivity.
| DevelopmentNote |
C NOTICE 1 - Notice of Validation. (09/2008) C NOTICE 2 - Notice of Validation. (02/2018) New child NOT 3 2022 is now added.
|
| DocumentType |
Standard
|
| Pages |
22
|
| ProductNote |
NEW CHILD NOT 2 IS NOW ADDED. New child NOT 3 2022 is now added.
|
| PublisherName |
US Military Specs/Standards/Handbooks
|
| Status |
Current
|
This 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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| MIL-A-22771 Revision D:1984 | ALUMINUM ALLOY FORGINGS, HEAT TREATED |
| QQ-A-225 Revision G:1990 | ALUMINUM AND ALUMINUM ALLOY BAR, ROD, WIRE, OR SPECIAL SHAPES, ROLLED, DRAWN, OR COLD FINISHED, GENERAL SPECIFICATION FOR |
| SAE ARP 5812 : 2017 | ACTUATORS, LINEAR MECHANICAL, GENERAL SPECIFICATION GUIDE |
| MIL-A-21180 Revision D:1984 | ALUMINUM-ALLOY CASTINGS, HIGH STRENGTH |
| SAE AMS H 6088 : 2000 | HEAT TREATMENT OF ALUMINUM ALLOYS |
| SAE AMS2355M | QUALITY ASSURANCE, SAMPLING AND TESTING, ALUMINUM ALLOYS AND MAGNESIUM ALLOY, WROUGHT PRODUCTS (EXCEPT FORGING STOCK), AND ROLLED, FORGED, OR FLASH WELDED RINGS |
| SAE AMS 2772 : 2016 | HEAT TREATMENT OF ALUMINUM ALLOY RAW MATERIALS |
| SAE AMS2658D:2016 | HARDNESS AND CONDUCTIVITY INSPECTION OF WROUGHT ALUMINUM ALLOY PARTS |
| MIL-HDBK-6870 Revision B:2012 | NONDESTRUCTIVE INSPECTION PROGRAM REQUIREMENTS FOR AIRCRAFT AND MISSILE MATERIALS AND PARTS |
| MIL-HDBK-6870 Revision C:2020 | NONDESTRUCTIVE INSPECTION PROGRAM REQUIREMENTS FOR AIRCRAFT AND MISSILE MATERIALS AND PARTS |
| NASA STD 5006 : 2015 | GENERAL FUSION WELDING REQUIREMENTS FOR AEROSPACE MATERIALS |
| DIN 29546:1990-10 | Aerospace; wrought aluminium alloys sheet, plate and strip; technical specification; inactive for new design |
| SAE ARP 4058 : 2017 | GENERAL SPECIFICATION GUIDE FOR MECHANICAL GEARED ROTARY ACTUATORS |
| DIN 65186:1990-10 | Aerospace; wrought aluminium alloy sheet and strip shaped profiles (sections); technical specification; inactive for new design |
| MIL-H-6088 Revision G:1991 | HEAT TREATMENT OF ALUMINIUM ALLOYS |
| SAE AIR 4777 : 2013(R 2018) | NONDESTRUCTIVE INSPECTION (NDI) METHODS USED DURING PRODUCTION AND OPERATION OF AIRCRAFT WHEELS AND BRAKES |
| SAE AMS QQ A 225 : 2018 | ALUMINUM AND ALUMINUM ALLOY, BAR, ROD, WIRE OR SPECIAL SHAPES; ROLLED, DRAWN OR COLD FINISHED; GENERAL SPECIFICATION FOR |
| DIN 65166:1986-09 | AEROSPACE; WROUGHT ALUMINIUM ALLOY WEDGE; TECHNICAL SPECIFICATIONS |
| SAE AMS 4242 : 2015 | ALUMINUM ALLOY, CASTINGS, 4.7CU - 0.60AG - 0.35MN - 0.25MG - 0.25TI (B201.0-T7), SOLUTION HEAT TREATED AND OVERAGED |
| NAS410:2003 | NAS CERTIFICATION & QUALIFICATION OF NONDESTRUCTIVE TEST PERSONNEL |
| ASTM E 10 : 2017-05 | TEST METHOD FOR BRINELL HARDNESS OF METALLIC MATERIALS |
| ANSI/NCSL Z540 1 : 94(R2002) | CALIBRATION - CALIBRATION LABORATORIES AND MEASURING AND TEST EQUIPMENT - GENERAL REQUIREMENTS |
| ASTM B 193 : 2016 : REDLINE | Standard Test Method for Resistivity of Electrical Conductor Materials |
| ISO 10012-1:1992 | Quality assurance requirements for measuring equipment Part 1: Metrological confirmation system for measuring equipment |
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