THE steels to which reference is made in this article are primarily what are known as alloy constructional steels. The special steels which are being used to some extent in the construction of aeroplane frames and bodies are not included in this category. Alloy constructional steels are those developed by modern metallurgical research for use in engine parts, propeller shafting, and so forth.
Aircraft Engineering and Aerospace Technology – Emerald Publishing
Published: Feb 1, 1929