Methods for the Identification of Aircraft Tubing of Plain Carbon Steel and Chromium-Molybdenum Steel
A 1930 technical report from NASA's Technical Reports Server on methods for telling aircraft tubing of plain carbon steel from chromium-molybdenum steel, written for aeronautical engineers and inspectors. The single picture is a grainy halftone of a dark metal fitting with a cylindrical body and a tapered tubular shaft, showing the kind of part a designer might study for form and surface texture rather than for detail.
