This specification covers an aircraft-quality, low-alloy steel in the form of bars, forgings, mechanical tubing, and forging stock.
These products have been used typically for parts 0.500 inch (12.50 mm) and under in nominal section thickness at time of heat treatment requiring a through-hardening steel capable of developing hardness as high as 52 HRC when properly hardened and tempered and also parts of greater thickness but requiring proportionately lower hardness, but usage is not limited to such applications.
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Tolerances Low-Alloy Steel Bars
Tolerances Low-Alloy Steel Sheet, Strip, and Plate
Steel Bars Free-Machining Cold Drawn (SAE 1212 or SAE 1215)
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