Fay Industries, Inc.
Headquarters/East Coast Operations
Fay Industries, Inc.
PO Box 36097
17200 Foltz Parkway
Strongsville, OH 44136
Phone: (800) 523-4865
Email: order@fayind.net
Website: www.fayindustries.com
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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.
Unit of Measure
1 2 

Size

Estimated Weight per Foot

Estimated Weight 20-Ft. Bar

11/16 N/A 1.263 lb N/A 25.27 lb
3/4 N/A 1.504 lb N/A 30.07 lb
7/8 N/A 2.046 lb N/A 40.93 lb
1 N/A 2.673 lb N/A 53.46 lb
1 1/8 N/A 3.383 lb N/A 67.66 lb
1 1/4 N/A 4.176 lb N/A 83.53 lb
1 3/8 N/A 5.053 lb N/A 101.1 lb
1 1/2 N/A 6.014 lb N/A 120.3 lb
1 5/8 N/A 7.058 lb N/A 141.2 lb
1 3/4 N/A 8.186 lb N/A 163.7 lb
1 7/8 N/A 9.397 lb N/A 187.9 lb
2 N/A 10.69 lb N/A 213.8 lb
2 1/8 N/A 12.07 lb N/A 241.4 lb
2 1/4 N/A 13.53 lb N/A 270.6 lb
2 3/8 N/A 15.08 lb N/A 301.5 lb
2 1/2 N/A 16.71 lb N/A 334.1 lb
2 5/8 N/A 18.42 lb N/A 368.4 lb
2 3/4 N/A 20.21 lb N/A 404,3 lb
2 7/8 N/A 22.09 lb N/A 441.9 lb
3 N/A 24.06 lb N/A 481.1 lb
3 1/8 N/A 26.10 lb N/A 522.0 lb
3 1/4 N/A 28.23 lb N/A 564.6 lb
3 1/2 N/A 32.74 lb N/A 654.8 lb
3 5/8 N/A 35.12 lb N/A 702.5 lb
3 3/4 N/A 37.59 lb N/A 751.7 lb
4 N/A 42.77 lb N/A 855.3 lb
4 1/4 N/A 48.28 lb N/A 965.6 lb
4 1/2 N/A 54.13 lb N/A 1083 lb
4 3/4 N/A 60.31 lb N/A 1206 lb
5 N/A 66.82 lb N/A 1336 lb
5 1/4 N/A 73.67 lb N/A 1473 lb
5 1/2 N/A 80.86 lb N/A 1617 lb
5 3/4 N/A 88.37 lb N/A 1767 lb
6 N/A 96.22 lb N/A 1924 lb
6 1/4 N/A 104.4 lb N/A 2088 lb
6 1/2 N/A 112.9 lb N/A 2259 lb
6 3/4 N/A 121.8 lb N/A 2436 lb
7 N/A 131.0 lb N/A 2619 lb
7 1/4 N/A 140.5 lb N/A 2810 lb
7 1/2 N/A 150.4 lb N/A 3007 lb
7 3/4 N/A 160.5 lb N/A 3211 lb
8 N/A 171.1 lb N/A 3421 lb
8 1/4 N/A 181.9 lb N/A 3638 lb
8 1/2 N/A 193.1 lb N/A 3862 lb
8 3/4 N/A 204.6 lb N/A 4093 lb
9 N/A 216.5 lb N/A 4330 lb
9 1/4 N/A 228.7 lb N/A 4574 lb
9 1/2 N/A 241.2 lb N/A 4824 lb
9 3/4 N/A 254.1 lb N/A 5082 lb
10 N/A 267.3 lb N/A 5346 lb
Unit of Measure
1 2