MIL-HDBK-270A

Abstract

This handbook provides the following technical data and information for metals and alloys (in particular, aluminum, copper, nickel, and titanium alloys, and corrosion-resisting stainless steel): <br>(a) Common name. <br>(b) Commercial designation. <br>(c) UNS (unified numbering system) number. <br>(d) Chemical composition. <br>(e) Applicable Government and commercial specifications. <br>(f) Normal and other magnetic permeabilities at selected percentages of cold-working. <br>(g) Electrical conductivity. <br>(h) Magnetic permeability and electrical conductivity data source. <br>This document does not relieve the equipment manufacturers from meeting magnetic permeability requirements after fabrication regardless of any materials that were selected because of conclusions drawn from this handbook. <br><a>Tables I</a> through <a>V</a> contain data and information on non-ferrous alloys. <a>Tables VI</a> through <a>IX</a> contain data and information on iron alloys. <a>Table X</a> contains high strength steels (HY 80 and HY 100). <a>Table XI</a> lists magnetic permeability and electrical conductivity data sources. Each source has been assigned a number that relates to the numeric part of the code in the data sources column of <a>tables I</a> through <a>IX</a> (see <a>3.1.7</a>(i)). <a>Tables XII</a>, <a>XIII</a>, and <a>XIV</a> contain cross references of Government specifications to UNS numbers, commercial specifications to UNS numbers, and UNS numbers to Government specifications, respectively. For further cross-indexing of metals and alloys, refer to ASTM DS-56. <a>Table XV</a> contains an index of common names. <b><u>Intended Use:</u></b> The technical data and information contained herein are intended to be used as a guideline relating to the effects of fabrication methods on the magnetic permeability and electrical conductivity of materials. <br>