AISI 4140 is a chromium-molybdenum alloy steel The chromium content provides good hardness penetration, and the molybdenum content ensures uniform hardness and high strength AISI 4140 chrome-molybdenum steel can be oil hardened to a relatively high level of hardness The desirable properties of the AISI 4140 include superior toughness, good ...
AISI/SAE 4340 Alloy Steel, 4340, is a nickel-chromium-molybdenum alloy steel known for its toughness and its ability to attain high strengths in the heat-treated condition Commercial and military aircraft, automotive systems, forged hydraulic and other machine tool applications, forged steel crankshafts..
