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About Carbon Steel, Alloy Steel, Spring Steel, and Cast Iron
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Oversized Hardened Multipurpose 4140 Alloy Steel Bars
- Yield Strength: 95,000 psi
- Hardness: Rockwell C25 (Hard)
- Fabrication: Hot Rolled
- Specifications Met: ASTM A578, ASTM A829
Because the thickness is oversized, you can finish these bars to your exact requirements. 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. These bars have been manufactured to meet ASTM standards for quality and performance.
Note: Bars may be made from either 4140 or 4142 alloy steel. They are interchangeable in most applications.
If you don't see the size you're looking for, please specify a length under additional bar lengths.
Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
Bars
| Wd. | Thick. Tolerance | Mechanical Finish | Flatness Tolerance | 1/2 ft. Lg. | 1 ft. Lg. | 2 ft. Lg. | 3 ft. Lg. | 4 ft. Lg. | 6 ft. Lg. | 8 ft. Lg. | |
1/8" Thick. | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1/2" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 00000000 | |||||||
| 1" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 00000000 | |||||||
| 2" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 00000000 | |||||||
| 3" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 00000000 | |||||||
1/4" Thick. | |||||||||||
| 1" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 00000000 | |||||||
| 2" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 00000000 | |||||||
3/8" Thick. | |||||||||||
| 1" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 00000000 | |||||||
1/2" Thick. | |||||||||||
| 1/2" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 00000000 | |||||||
| 3/4" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 00000000 | |||||||
| 1" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 0000000 | |||||||
| 1 1/2" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 0000000 | |||||||
| 2" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 0000000 | |||||||
| 2 1/2" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 0000000 | |||||||
| 3" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 0000000 | |||||||
| 4" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 00000000 | |||||||
5/8" Thick. | |||||||||||
| 5/8" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 00000000 | |||||||
| 1" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 00000000 | |||||||
3/4" Thick. | |||||||||||
| 3/4" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 00000000 | |||||||
| 1" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 0000000 | |||||||
| 1 1/4" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 00000000 | |||||||
| 1 1/2" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 0000000 | |||||||
| 2" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 0000000 | |||||||
| 2 1/2" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 0000000 | |||||||
| 3" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 0000000 | |||||||
| 4" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 00000000 | |||||||
1" Thick. | |||||||||||
| 1" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 0000000 | |||||||
| 1 1/4" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 00000000 | |||||||
| 1 1/2" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 0000000 | |||||||
| 1 3/4" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 00000000 | |||||||
| 2" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 0000000 | |||||||
| 2 1/2" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 0000000 | |||||||
| 3" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 0000000 | |||||||
| 3 1/2" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 00000000 | |||||||
| 4" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 00000000 | |||||||
| 5" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 00000000 | |||||||
1 1/4" Thick. | |||||||||||
| 1 1/4" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 00000000 | |||||||
| 2" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 00000000 | |||||||
1 1/2" Thick. | |||||||||||
| 1 1/2" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 0000000 | |||||||
| 1 3/4" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 00000000 | |||||||
| 2" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 0000000 | |||||||
| 2 1/2" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 0000000 | |||||||
| 3" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 0000000 | |||||||
| 3 1/2" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 00000000 | |||||||
| 4" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 00000000 | |||||||
2" Thick. | |||||||||||
| 2" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 0000000 | |||||||
| 2 1/2" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 0000000 | |||||||
| 3" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 0000000 | |||||||
| 3 1/2" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 00000000 | |||||||
| 4" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 00000000 | |||||||
2 1/2" Thick. | |||||||||||
| 2 1/2" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 00000000 | |||||||
3" Thick. | |||||||||||
| 3" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 00000000 | |||||||
4" Thick. | |||||||||||
| 4" | 0.020" to 0.045" | Ground | 1/16" per 5 ft. | 00000000 | |||||||
Additional Bar Lengths
To Order: Please specify length in increments of 0.25" within the range listed.
| Wd. | Thick. Tolerance | Mechanical Finish | Flatness Tolerance | Choose a Length | Per Inch | |
1/2" Thick. | ||||||
|---|---|---|---|---|---|---|
| 1" | 0.020" to 0.04" | Ground | 1/16" per 5 ft. | 13"-90" | 0000000 | 00000 |
| 1 1/2" | 0.020" to 0.04" | Ground | 1/16" per 5 ft. | 13"-90" | 0000000 | 0000 |
| 2" | 0.020" to 0.04" | Ground | 1/16" per 5 ft. | 13"-90" | 0000000 | 0000 |
| 2 1/2" | 0.020" to 0.04" | Ground | 1/16" per 5 ft. | 13"-90" | 0000000 | 0000 |
| 3" | 0.020" to 0.04" | Ground | 1/16" per 5 ft. | 13"-90" | 0000000 | 0000 |
| 4" | 0.020" to 0.04" | Ground | 1/16" per 5 ft. | 13"-90" | 0000000 | 0000 |
3/4" Thick. | ||||||
| 1" | 0.020" to 0.04" | Ground | 1/16" per 5 ft. | 13"-90" | 0000000 | 0000 |
| 1 1/2" | 0.020" to 0.04" | Ground | 1/16" per 5 ft. | 13"-90" | 0000000 | 0000 |
| 2" | 0.020" to 0.04" | Ground | 1/16" per 5 ft. | 13"-90" | 0000000 | 0000 |
| 2 1/2" | 0.020" to 0.04" | Ground | 1/16" per 5 ft. | 13"-90" | 0000000 | 0000 |
| 3" | 0.020" to 0.04" | Ground | 1/16" per 5 ft. | 13"-90" | 0000000 | 0000 |
| 4" | 0.020" to 0.04" | Ground | 1/16" per 5 ft. | 13"-90" | 0000000 | 0000 |
1" Thick. | ||||||
| 1" | 0.020" to 0.04" | Ground | 1/16" per 5 ft. | 13"-90" | 0000000 | 0000 |
| 1 1/2" | 0.020" to 0.04" | Ground | 1/16" per 5 ft. | 13"-90" | 0000000 | 0000 |
| 2" | 0.020" to 0.04" | Ground | 1/16" per 5 ft. | 13"-90" | 0000000 | 0000 |
| 2 1/2" | 0.020" to 0.04" | Ground | 1/16" per 5 ft. | 13"-90" | 0000000 | 0000 |
| 3" | 0.020" to 0.04" | Ground | 1/16" per 5 ft. | 13"-90" | 0000000 | 00000 |
| 4" | 0.020" to 0.04" | Ground | 1/16" per 5 ft. | 13"-90" | 0000000 | 00000 |
1 1/4" Thick. | ||||||
| 1 1/4" | 0.020" to 0.04" | Ground | 1/16" per 5 ft. | 13"-90" | 0000000 | 0000 |
| 1 1/2" | 0.020" to 0.04" | Ground | 1/16" per 5 ft. | 13"-90" | 0000000 | 0000 |
| 2" | 0.020" to 0.04" | Ground | 1/16" per 5 ft. | 13"-90" | 0000000 | 0000 |
| 2 1/2" | 0.020" to 0.04" | Ground | 1/16" per 5 ft. | 13"-90" | 0000000 | 0000 |
| 3" | 0.020" to 0.04" | Ground | 1/16" per 5 ft. | 13"-90" | 0000000 | 00000 |
| 4" | 0.020" to 0.04" | Ground | 1/16" per 5 ft. | 13"-90" | 0000000 | 00000 |
1 1/2" Thick. | ||||||
| 1 1/2" | 0.020" to 0.04" | Ground | 1/16" per 5 ft. | 13"-90" | 0000000 | 0000 |
| 2" | 0.020" to 0.04" | Ground | 1/16" per 5 ft. | 13"-90" | 0000000 | 00000 |
| 2 1/2" | 0.020" to 0.04" | Ground | 1/16" per 5 ft. | 13"-90" | 0000000 | 00000 |
| 3" | 0.020" to 0.04" | Ground | 1/16" per 5 ft. | 13"-90" | 0000000 | 00000 |
| 4" | 0.020" to 0.04" | Ground | 1/16" per 5 ft. | 13"-90" | 0000000 | 00000 |
Oversized Multipurpose 4140 Alloy Steel Sheets and Bars
- Yield Strength: 60,000psi
- Hardness : Rockwell C15 (Medium)
- Heat Treatable: Yes
- Maximum Hardness After Heat Treatment: Rockwell C32
- Specifications Met: ASTM A829
The thickness is oversized for finishing to your exact requirements. Also known as chrome-moly steel, this versatile 4140 alloy steel is used for a wide range of parts, such as gears, axles, shafts, collets, and die holders. It resists fracturing from repeated stress. These sheets and bars are decarb-free for a uniform surface that will consistently accept heat treating.
For technical drawings and 3-D models, click on a part number.
Certificates with a traceable lot number are available for these products. Download certificates from ORDER HISTORY after your order ships.
Sheets
| Thick. | Thick. Tolerance | Heat Treatment | Mechanical Finish | Flatness Tolerance | Each | |
6" × 6" | ||||||
|---|---|---|---|---|---|---|
| 0.25" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 000000 |
| 0.375" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 00000 |
| 0.5" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 00000 |
| 0.625" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 00000 |
| 0.75" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 00000 |
| 1" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 00000 |
| 1.25" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 00000 |
| 1.5" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 00000 |
6" × 12" | ||||||
| 0.25" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 00000 |
| 0.375" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 00000 |
| 0.5" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 00000 |
| 0.625" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 00000 |
| 0.75" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 00000 |
| 1" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 000000 |
| 1.25" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 000000 |
| 1.5" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 000000 |
6" × 24" | ||||||
| 0.25" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 000000 |
| 0.375" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 000000 |
| 0.5" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 000000 |
| 0.625" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 000000 |
| 0.75" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 000000 |
| 1" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 000000 |
| 1.25" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 000000 |
| 1.5" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 000000 |
8" × 8" | ||||||
| 0.25" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 00000 |
| 0.375" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 00000 |
| 0.5" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 00000 |
| 0.625" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 00000 |
| 0.75" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 00000 |
| 1" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 000000 |
| 1.25" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 000000 |
| 1.5" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 000000 |
10" × 12" | ||||||
| 0.25" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 00000 |
| 0.375" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 000000 |
| 0.5" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 000000 |
| 0.625" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 000000 |
| 0.75" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 000000 |
| 1" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 000000 |
| 1.25" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 000000 |
| 1.5" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 000000 |
12" × 12" | ||||||
| 0.25" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 000000 |
| 0.375" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 000000 |
| 0.5" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 000000 |
| 0.625" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 000000 |
| 0.75" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 000000 |
| 1" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 000000 |
| 1.25" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 000000 |
| 1.5" | 0.02" to 0.045" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 0000000 | 000000 |
Bars
To Order: Please specify length in increments of 0.25" within the range listed.
| Wd. | Heat Treatment | Mechanical Finish | Flatness Tolerance | Choose a Length | Per Inch | |
1/2" Thick. (0.02" to 0.04" Tolerance) | ||||||
|---|---|---|---|---|---|---|
| 1" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 13"-90" | 00000000 | 00000 |
| 1 1/2" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 13"-90" | 00000000 | 0000 |
| 2" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 13"-90" | 00000000 | 0000 |
| 2 1/2" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 13"-90" | 00000000 | 0000 |
| 3" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 13"-90" | 00000000 | 0000 |
| 4" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 13"-90" | 00000000 | 0000 |
3/4" Thick. (0.02" to 0.04" Tolerance) | ||||||
| 1" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 13"-90" | 00000000 | 0000 |
| 1 1/2" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 13"-90" | 00000000 | 0000 |
| 2" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 13"-90" | 00000000 | 0000 |
| 2 1/2" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 13"-90" | 00000000 | 0000 |
| 3" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 13"-90" | 00000000 | 0000 |
| 4" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 13"-90" | 00000000 | 0000 |
1" Thick. (0.02" to 0.04" Tolerance) | ||||||
| 1" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 13"-90" | 00000000 | 0000 |
| 1 1/2" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 13"-90" | 00000000 | 0000 |
| 2" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 13"-90" | 00000000 | 0000 |
| 2 1/2" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 13"-90" | 00000000 | 0000 |
| 3" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 13"-90" | 00000000 | 00000 |
| 4" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 13"-90" | 00000000 | 00000 |
1 1/4" Thick. (0.02" to 0.04" Tolerance) | ||||||
| 1 1/4" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 13"-90" | 00000000 | 0000 |
| 1 1/2" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 13"-90" | 00000000 | 0000 |
| 2" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 13"-90" | 00000000 | 0000 |
| 2 1/2" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 13"-90" | 00000000 | 0000 |
| 3" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 13"-90" | 00000000 | 00000 |
| 4" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 13"-90" | 00000000 | 00000 |
1 1/2" Thick. (0.02" to 0.04" Tolerance) | ||||||
| 1 1/2" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 13"-90" | 00000000 | 0000 |
| 2" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 13"-90" | 00000000 | 00000 |
| 2 1/2" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 13"-90" | 00000000 | 00000 |
| 3" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 13"-90" | 00000000 | 00000 |
| 4" | Annealed (Softened) | Ground | 1/16" per 5 ft. | 13"-90" | 00000000 | 00000 |