WORKABLE: Alloy C4140 steel is an oil-hardening steel of relatively high hardenability. Its chromium content provides good hardness penetration, and the molybdenum imparts uniformity of hardness and high strength. C4140 steel responds well to heat-treatment and is comparatively easily machined in the heat-treated condition. With a combination of such highly desirable properties as good strength and wear resistance, excellent toughness, coupled with good ductility, and the ability to resist stress at elevated temperatures.
USES: Drill Collars, Bolts, Rotary Table Shafting, Axle Shafts, Chain Links, Rams, Piston Rods, Etc.
PROPERTIES: Tensile Strength 95,000 PSI, Yield Strength 60,000 PSI min.
HARDNESS: Brinell Hardness — 187