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All Categories > Alloyed Bars and Plates > Cold Finished Alloy Steels > 4140 Annealed Cold Finished Alloy Steels > 4140 Annealed and Cold Drawn Alloy Steel - Hexagons  
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4140 Annealed and Cold Drawn Alloy Steel - Hexagons

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These are oil-hardening steels of relatively high hardenability. Their chromium content provides good hardness penetration, and the molybdenum imparts uniformity of hardness and high strength. These grades are especially suitable for forging because they have self-scaling characteristics. They respond readily to heat treatment and are comparatively easy to machine in the heat treated condition. They resist creep in temperatures up to 1000°F and maintain their properties even after long exposure at these relatively high working temperatures. 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, it is understandable why these are widely used and highly successful alloy steels.

This material is also available as leaded steel. The addition of lead improves machinability without sacrificing other desirable properties, with the exception that the use of this material is not recommended for applications over 400°F, since at elevated temperature ductility is low.

The following specifications are generally applicable for 4140/42 Heat Treated Rounds: ASTM A 193, Grade B7; ASTM A 434, Grades BC and BD.

Maximum Brinell 235

Stock Lengths 12' Approx.


Item #

Estimated Weight per Foot

Estimated Weight 12-Ft. Bar

7/16 .5641 lb 6.769 lb
1/2 .7368 lb 8.842 lb
9/16 .9325 lb 11.19 lb
5/8 1.151 lb 13.82 lb
11/16 1.393 lb 16.72 lb
3/4 1.658 lb 19.89 lb
13/16 1.946 lb 23.35 lb
7/8 2.257 lb 27.08 lb
15/16 2.590 lb 31.08 lb
1 2.947 lb 35.37 lb
Showing 10 of 27  |  View All 27 Standard Items

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