MIL-DTL-8971F
3.4 Mass. The mass of the electrodes shall be determined in accordance with 4.6.2.1.
The mass of a disk electrode shall be not less than 0.918 grams (g). The mass of a rod electrode
shall be not less than 7.18 g.
3.5 Density. The density of the electrode stock shall be determined in accordance with
3.6 Resistivity. The resistivity of the electrode material shall be determined in
accordance with 4.6.2.3. The resistivity shall be 220 to 450 micro-ohm-inches (µΩ-inches).
3.7 Flexural strength. The flexural strength of the electrode material shall be determined
in accordance with 4.6.2.4. The flexural strength shall be 2,200 to 7,300 pounds per square inch
(psi).
3.8 Electrode impurities. The following elements are classified as impurities for
electrodes covered by this specification: iron (Fe), silver (Ag), molybdenum (Mo), aluminum
(Al), chromium (Cr), nickel (Ni), silicon (Si), copper (Cu), magnesium (Mg), sodium (Na), lead
(Pb), tin (Sn), titanium (Ti), boron (B) and zinc (Zn). The amount of impurities in electrodes
shall be determined in accordance with 4.6.2.5. The amount of each impurity element in
electrodes shall be not more than one part per million (ppm). The combined amount of all
impurity elements in electrodes shall be not more than six ppm.
3.9 Electrode accuracy and repeatability. The accuracy and repeatability characteristics
of electrodes shall be determined in accordance with 4.6.2.6. Electrode accuracy characteristics
shall conform to the criteria of table I. Electrode repeatability characteristics shall conform to the
criteria of table II. For identification and test purposes, new electrodes being tested for
qualification or conformance determination shall be identified as 'candidate' electrodes, and
'reference' electrodes shall refer to electrodes that have previously been tested and approved for
government use, and are being used to facilitate the testing of candidate electrodes.
3.10 Workmanship. The electrodes shall be uniform in quality and free from all defects
(such as pits, chips, flat spots, cracks, fractures, and spalling), which may affect their
serviceability and appearance (see 4.6.1).
3.11 Cleanliness. Disk electrodes, rod electrodes, non-electrode test specimens (see
4.3.1) and containers supplied to the Government shall be free of non-carbon dust, dirt,
machining debris or scrap, fingerprints, moisture, or other foreign matter that can be detected by
visual examination and/or touch (see 4.6.1).
5
For Parts Inquires submit RFQ to Parts Hangar, Inc.
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business