4140 is one of the chromium, molybdenum, manganese low alloy steels noted for toughness, good torsional strength and good fatigue strength.
4140 is generally pre-hardened and tempered and can be further surface hardened by flame or induction hardening and nitriding.
4140 is used in most industry sectors in a varity of applications as:
Various Shafts & Parts, Spindles, Ejector Pins
Adapters, Arbors, Bolts, Connection Rods, Chuck Bodies, Collets, Various Pins & Rolls, Forks, Gears, , Rods, Nuts, Pinions, etc
Carbon 0.36-0.44 %
Silicon 0.10-0.40 %
Manganese 0.65-1.10 %
Chromium 0.75-1.20 %
Molybdenum 0.15-0.35 %
Phosphorous 0-0.04 %
Sulphur 0-0.04 %
AISI 4140 Chrome - Moly High Tensile
Steel, offers a very good balance of strength,
toughness and wear-resistance with generally hardened and tempered properly with a tensile strength of around 850-1000 MPa.