Problem 2-15 - From the last two digits the carbon content...

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MACHINE DESIGN - An 2-15-1 PROBLEM 2-15 Statement: What are the principal alloy elements of an AISI 4340 steel? How much carbon does it have? Is it hardenable? By what techniques? Solution: See Mathcad file P0215. 1. Determine the principal alloying elements from Table 2-5 for 43xx steel. . 1.82% Nickel 0.50 or 0.80% Chromium 0.25% Molybdenum 2. From "Steel Numbering Systems" in Section 2.6, the carbon content is
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Unformatted text preview: From the last two digits, the carbon content is 0.40%. 3. Is it hardenable? Yes, all of the alloying elements increase the hardenability. By what techniques? It can be through hardened by heating, quenching and tempering; and it can also be case hardened ( See Section 2.4). P
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