This alloy responds well to heat treatment. Its chromium content provides good hardenss penetration, and the molybdenum imparts uniformity of hardness and high strength. In the annealed condition it machines at 110 sfm. Other desirable properties include good wear resistance, excellent toughness and good ductility in the quenched and tempered condition.

Shape	Round, Hexagon, Flats
Grade	4140
Tolerance	Meets cold finished carbon steel bar manufacturing tolerances
Application	Highly stressed parts, or parts subject to severe wear.

Specifications

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Available Sizes

Rounds All popular sizes Hexagon All popular sizes Flats All popular sizes

Available Length

Round For best delivery lengths should be specified as 11'/13'. Hexagon For best delivery lengths should be specified as 11'/13'. Flats For best delivery lengths should be specified as 11'/13'.

Available Finishes

Rounds, Hexagon, Flats Standard "as drawn" finish Rounds, Hexagon, Flats Ground and Polished Rounds, Hexagon, Flats Turned Ground and Polished Rounds, Hexagon, Flats Turned and Polished Rounds, Hexagon, Flats Rough Turned

Chemistry

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Chemistry

Carbon 0.38/0.43 Maganese 0.75/1.00 Phosphorus 0.035 (Max) Sulphur 0.04 (Max) Silicon 0.15/0.35 Chromium 0.80/1.10 Molybdenum 0.15/0.25