We stock AISI 4140 and AISI 4150 steel in rounds, squares, and flats. All material is provided in a hot roll finish. Call or Email Us For a Free Quote. Material is quench & tempered, stress relieved and machine straightened. We offer an extensive inventory of hard-to-find sizes and lengths including (10/12 Ft Random Lengths, 20/24 Ft Random Lengths and Custom Cut-To-Length options). Alloy 4140 and 4150 are widely used for general purpose machine applications. Typically, round bar stock over 10″ diameter is furnished as Rough Turned Oversized.

Typical Mechanical PropertiesAvailable Lengths
Brinnell Hardness – 269/341BHN
Tensile Strength – 156,000 PSI
Yield Strength – 123,500 PSI
10/13 Ft R/L
20/26 Ft R/L
Custom Cut-To-Lengths

ROUNDS (INCHES)

1/2 1-7/8 3-1/2 6-1/4 9 14
5/8 2 3-3/4 6-1/2 9-1/2 15
3/4 2-1/8 4 6-3/4 9-3/4 16
7/8 2-1/4 4-1/4 7 10
1 2-3/8 4-1/2 7-1/4 10-1/2
1-1/8 2-1/2 4-3/4 7-1/2 11
1-1/4 2-5/8 5 7-3/4 11-1/4
1-3/8 2-3/4 5-1/4 8 11-1/2
1-1/2 2-7/8 5-1/2 8-1/4 12
1-5/8 3 5-3/4 8-1/2 13
1-3/4 3-1/4 6 8-3/4 13-1/2

SQUARES (INCHES)

1/2 1 1-3/4 3-1/2 6
5/8 1-1/8 2 4
3/4 1-1/4 2-1/2 4-1/2
7/8 1-1/2 3 5

FLATS (INCHES)

1/4 x 1 3/8 x 4 5/8 x 3 1 x 2-1/2 1-1/2 x 2-1/2 2-1/2 x 3-1/2
1/4 x 1-1/2 1/2 x 1 3/4 x 1-1/2 1 x 3 1-1/2 x 3 2-1/2 x 4
1/4 x 2 1/2 x 1-1/2 3/4 x 2 1 x 4 1-1/2 x 4 2-1/2 x 6
1/4 x 3 1/2 x 2 3/4 x 2-1/2 1 x 5 1-1/2 x 5 3 x 4
1/4 x 4 1/2 x 2-1/2 3/4 x 3 1 x 6 1-1/2 x 6 3 x 5
1/4 x 5 1/2 x 3 3/4 x 4 1-1/4 x 2 2 x 2-1/2 3 x 6
1/4 x 6 1/2 x 3-1/2 3/4 x 5 1-1/4 x 2-1/2 2 x 3
3/8 x 1-1/2 1/2 x 4 3/4 x 6 1-1/4 x 3 2 x 3-1/2
3/8 x 2 1/2 x 5 1 x 1-1/4 1-1/4 x 3-1/2 2 x 4
3/8 x 2-1/2 1/2 x 6 1 x 1-1/2 1-1/4 x 4 2 x 5
3/8 x 3 5/8 x 2 1 x 2 1-1/2 x 2 2 x 6

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Phone: 800.321.8500