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Compare over 50 grades of steel and cast iron to find the right material for you—all with material certificates for traceability.
Hardened Multipurpose 4140 Alloy Steel Bars
 |
The surface of these bars is hardened to increase their resistance to impacts and abrasion. Also known as chrome-moly steel, which is used to create molds, structural supports, and other parts. It resists fracturing from repeated stress.
If you don't see the size you're looking for, check out our Made-to-Order Hardened 4140 Alloy Steel Bars.
Note: Bars may be made from either 4140 or 4142 alloy steel. They are interchangeable in most applications.
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Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
Wd. | Fabrication | Heat Treatment | Yield Strength, psi | Hardness | Mechanical Finish | Specs. Met | 1/2 ft. Long | 1 ft. Long | 2 ft. Long | 3 ft. Long | 4 ft. Long | 6 ft. Long | 8 ft. Long | |||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1/8" Thick | ||||||||||||||||
| 1/2" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K787 | — | — | — | 000000 | — | 000000 | — | ||
| 1" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K788 | — | 000000 | — | 00000 | — | 00000 | — | ||
| 2" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K789 | — | 00000 | — | 00000 | — | 000000 | — | ||
| 3" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K791 | — | 00000 | — | 00000 | — | 000000 | — | ||
1/4" Thick | ||||||||||||||||
| 1" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K792 | — | 00000 | — | 00000 | — | 00000 | — | ||
| 2" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K793 | — | 00000 | — | 00000 | — | 000000 | — | ||
3/8" Thick | ||||||||||||||||
| 1" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K794 | — | 00000 | — | 00000 | — | 00000 | — | ||
1/2" Thick | ||||||||||||||||
| 1/2" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K795 | — | 00000 | — | 00000 | — | 00000 | — | ||
| 3/4" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K796 | — | 00000 | — | 00000 | — | 00000 | — | ||
| 1" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K11 | 000000 | 00000 | 000000 | 00000 | — | 000000 | — | ||
| 1 1/2" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K12 | 00000 | 00000 | 00000 | 00000 | — | 000000 | — | ||
| 2" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K13 | 00000 | 00000 | 00000 | 00000 | — | 000000 | — | ||
| 2 1/2" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K14 | 00000 | 00000 | 00000 | 000000 | — | 000000 | — | ||
| 3" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K15 | 00000 | 00000 | 00000 | 000000 | — | 000000 | — | ||
| 4" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K797 | — | 00000 | — | 000000 | — | 000000 | — | ||
5/8" Thick | ||||||||||||||||
| 5/8" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K798 | — | 00000 | — | 00000 | — | 00000 | — | ||
| 1" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K799 | — | 00000 | — | 00000 | — | 000000 | — | ||
3/4" Thick | ||||||||||||||||
| 3/4" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K801 | — | 00000 | — | 00000 | — | 000000 | — | ||
| 1" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K21 | 00000 | 00000 | 00000 | 00000 | — | 000000 | 0000000 | ||
| 1 1/4" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K802 | — | 00000 | — | 00000 | — | 000000 | — | ||
| 1 1/2" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K22 | 00000 | 00000 | 00000 | 00000 | — | 000000 | — | ||
| 2" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K23 | 00000 | 00000 | 00000 | 000000 | — | 000000 | — | ||
| 2 1/2" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K24 | 00000 | 00000 | 000000 | 000000 | — | 000000 | — | ||
| 3" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K25 | 00000 | 00000 | 000000 | 000000 | — | 000000 | — | ||
| 4" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K803 | — | 00000 | — | 000000 | — | 000000 | — | ||
1" Thick | ||||||||||||||||
| 1" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K31 | 00000 | 00000 | 00000 | 00000 | 000000 | 000000 | 000000 | ||
| 1 1/4" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K804 | — | 00000 | — | 00000 | — | 000000 | — | ||
| 1 1/2" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K32 | 00000 | 00000 | 00000 | 000000 | 000000 | 000000 | 000000 | ||
| 1 3/4" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K805 | — | 00000 | — | 000000 | — | 000000 | — | ||
| 2" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K33 | 00000 | 00000 | 000000 | 000000 | — | 000000 | — | ||
| 2 1/2" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K34 | 00000 | 00000 | 000000 | 000000 | — | 000000 | — | ||
| 3" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K35 | 00000 | 00000 | 000000 | 000000 | — | 000000 | — | ||
| 3 1/2" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K806 | — | 00000 | — | 000000 | — | 000000 | — | ||
| 4" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K807 | — | 000000 | — | 000000 | — | 000000 | — | ||
| 5" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K768 | — | 000000 | — | — | — | — | — | ||
1 1/4" Thick | ||||||||||||||||
| 1 1/4" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K808 | — | 00000 | — | 000000 | — | 000000 | — | ||
| 2" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K809 | — | 00000 | — | 000000 | — | 000000 | — | ||
1 1/2" Thick | ||||||||||||||||
| 1 1/2" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K41 | 00000 | 00000 | 00000 | 000000 | — | 000000 | — | ||
| 1 3/4" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K811 | — | 00000 | — | 000000 | — | 000000 | — | ||
| 2" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K42 | 00000 | 00000 | 000000 | 000000 | — | 000000 | — | ||
| 2 1/2" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K43 | 00000 | 00000 | 000000 | 000000 | — | 000000 | — | ||
| 3" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K44 | 00000 | 00000 | 000000 | 000000 | — | 000000 | — | ||
| 3 1/2" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K779 | — | 000000 | — | — | — | — | — | ||
| 4" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K781 | — | 000000 | — | — | — | — | — | ||
2" Thick | ||||||||||||||||
| 2" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K51 | 00000 | 00000 | 000000 | 000000 | — | 000000 | — | ||
| 2 1/2" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K52 | 00000 | 000000 | 000000 | 000000 | — | 000000 | — | ||
| 3" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K53 | 00000 | 000000 | 000000 | 000000 | — | 000000 | — | ||
| 3 1/2" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K782 | — | 000000 | — | — | — | — | — | ||
| 4" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K783 | — | 000000 | — | — | — | — | — | ||
2 1/2" Thick | ||||||||||||||||
| 2 1/2" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K784 | — | 000000 | — | — | — | — | — | ||
3" Thick | ||||||||||||||||
| 3" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K785 | — | 000000 | — | — | — | — | — | ||
4" Thick | ||||||||||||||||
| 4" | Hot Rolled | Hardened | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 9116K786 | — | 000000 | — | — | — | — | — | ||
Made-to-Order Hardened 4140 Alloy Steel Bars
|
When an off-the-shelf size won't do, we'll get you the exact dimensions you need.
They are hardened for increased abrasion and impact resistance. Also known as chrome-moly steel, this versatile alloy steel is used for a variety of parts, such as molds and structural supports. It resists fracturing from repeated stress. These ground bars are decarb-free, which means residue created during manufacturing has been removed. As a result, these bars have a uniform surface that's ready for machining, heat treating, and finishing. Because the thickness is oversized, you can finish these bars to your exact requirements.
Note: Bars may be made from either 4140 or 4142 alloy steel. They are interchangeable in most applications.
Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
Wd. | Choose a Length | Fabrication | Yield Strength, psi | Hardness | Mechanical Finish | Specs. Met | Per Inch | |||
|---|---|---|---|---|---|---|---|---|---|---|
1/2" Thick (0.020" to 0.04" Tolerance) | ||||||||||
| 1" | 13" to 90" | Hot Rolled | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 6682N11 | 00000 | ||
| 1 1/2" | 13" to 90" | Hot Rolled | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 6682N12 | 0000 | ||
| 2" | 13" to 90" | Hot Rolled | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 6682N13 | 0000 | ||
| 2 1/2" | 13" to 90" | Hot Rolled | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 6682N14 | 0000 | ||
| 3" | 13" to 90" | Hot Rolled | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 6682N15 | 0000 | ||
| 4" | 13" to 90" | Hot Rolled | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 6682N16 | 0000 | ||
3/4" Thick (0.020" to 0.04" Tolerance) | ||||||||||
| 1" | 13" to 90" | Hot Rolled | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 6682N17 | 0000 | ||
| 1 1/2" | 13" to 90" | Hot Rolled | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 6682N18 | 0000 | ||
| 2" | 13" to 90" | Hot Rolled | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 6682N19 | 0000 | ||
| 2 1/2" | 13" to 90" | Hot Rolled | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 6682N21 | 0000 | ||
| 3" | 13" to 90" | Hot Rolled | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 6682N22 | 0000 | ||
| 4" | 13" to 90" | Hot Rolled | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 6682N23 | 0000 | ||
1" Thick (0.020" to 0.04" Tolerance) | ||||||||||
| 1" | 13" to 90" | Hot Rolled | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 6682N24 | 0000 | ||
| 1 1/2" | 13" to 90" | Hot Rolled | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 6682N25 | 0000 | ||
| 2" | 13" to 90" | Hot Rolled | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 6682N26 | 0000 | ||
| 2 1/2" | 13" to 90" | Hot Rolled | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 6682N27 | 0000 | ||
| 3" | 13" to 90" | Hot Rolled | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 6682N28 | 00000 | ||
| 4" | 13" to 90" | Hot Rolled | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 6682N29 | 00000 | ||
1 1/4" Thick (0.020" to 0.04" Tolerance) | ||||||||||
| 1 1/4" | 13" to 90" | Hot Rolled | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 6682N31 | 0000 | ||
| 1 1/2" | 13" to 90" | Hot Rolled | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 6682N32 | 0000 | ||
| 2" | 13" to 90" | Hot Rolled | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 6682N33 | 0000 | ||
| 2 1/2" | 13" to 90" | Hot Rolled | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 6682N34 | 0000 | ||
| 3" | 13" to 90" | Hot Rolled | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 6682N35 | 00000 | ||
| 4" | 13" to 90" | Hot Rolled | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 6682N36 | 00000 | ||
1 1/2" Thick (0.020" to 0.04" Tolerance) | ||||||||||
| 1 1/2" | 13" to 90" | Hot Rolled | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 6682N37 | 0000 | ||
| 2" | 13" to 90" | Hot Rolled | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 6682N38 | 00000 | ||
| 2 1/2" | 13" to 90" | Hot Rolled | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 6682N39 | 00000 | ||
| 3" | 13" to 90" | Hot Rolled | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 6682N41 | 00000 | ||
| 4" | 13" to 90" | Hot Rolled | 95,000 | Rockwell C25 (Hard) | Ground | ASTM A578, ASTM A829 | 6682N42 | 00000 | ||
