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All Categories > Alloyed Bars and Plates > Hot Rolled Alloy Steels > 4340 Hot Rolled Annealed Alloy Steel > 4340 Hot Rolled Annealed Alloy Steel - Rounds  
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4340 Hot Rolled Annealed Alloy Steel - Rounds

58 Items Available

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This is the "king" of the hardening grades of constructional alloy steels. Because of richer alloy content, 4340 possesses much deeper hardenability than the 4100 series. This advantage is realized principally where high strength is required in heavy sections. In addition, unusually high hardenability insures maximum toughness and ductility at the desired strength level. The fatigue-tensile ratio makes this grade ideal for highly stressed parts. It maintains its strength, ductility, and toughness at relatively high temperatures. It has remarkable non-distorting properties for an alloy steel. Thus, for high strength in heavy sections, or for highly stressed parts operating under the most severe conditions, or where the greatest margin of safety is desired, this is the steel to use.

Nickel-Chromium-Molybdenum Steel

UNS G43400

Machine Straightened

Maximum Brinell 235

Stock Lengths 20' Approx.

Item #

Estimated Weight per Foot

Estimated Weight 20-Ft. Bar

11/16 1.263 lb 25.27 lb
3/4 1.504 lb 30.07 lb
7/8 2.046 lb 40.93 lb
1 2.673 lb 53.46 lb
1 1/8 3.383 lb 67.66 lb
1 1/4 4.176 lb 83.53 lb
1 3/8 5.053 lb 101.1 lb
1 1/2 6.014 lb 120.3 lb
1 5/8 7.058 lb 141.2 lb
1 3/4 8.186 lb 163.7 lb
Showing 10 of 58  |  View All 58 Standard Items


Tolerance - Hot Rolled Carbon and Alloy Bars
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Tolerances - Carbon and Alloy Bars
(PDF, 358KB)

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