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Fabrication Fabrication |
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Yield Strength Yield Strength |
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Tolerance Rating Tolerance Rating |
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Maximum Hardness After Heat Treatment Maximum HardnessAfter Heat Treatment |
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Hardness Hardness |
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Heat Treatment Heat Treatment |
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About Carbon Steel, Alloy Steel, Spring Steel, and Cast Iron
More
Low-Carbon Steel Hex Bars
- Yield Strength:
Inch sizes: 54,000 psi
Metric sizes: Not Rated - Hardness:
Inch sizes: Rockwell B70 (Medium)
Metric sizes: Rockwell B80 (Medium) - Heat Treatable: Yes
- Max. Hardness After Heat Treatment:
Inch sizes: Rockwell C60
Metric sizes: Not Rated - Specifications Met:
Inch sizes: ASTM A108
Also known as mild steel, low-carbon steel is easy to machine, form, and weld. It's widely fabricated into parts that don’t require high strength, such as fixture clamps, mounting plates, and spacers. This material can be surface hardened with heat treating.
For technical drawings and 3-D models, click on a part number.
| Wd. | Wd. Tolerance | 1 ft. Lg. | 3 ft. Lg. | 6 ft. Lg. | |
| 1/4" | -0.002" to 0" | 00000000 | |||
| 5/16" | -0.002" to 0" | 00000000 | |||
| 3/8" | -0.002" to 0" | 00000000 | |||
| 1/2" | -0.002" to 0" | 00000000 | |||
| 5/8" | -0.002" to 0" | 00000000 | |||
| 11/16" | -0.002" to 0" | 00000000 | |||
| 3/4" | -0.002" to 0" | 0000000 | |||
| 7/8" | -0.003" to 0" | 0000000 | |||
| 1" | -0.003" to 0" | 0000000 | |||
| 1 1/8" | -0.003" to 0" | 00000000 | |||
| 1 1/4" | -0.003" to 0" | 0000000 | |||
| 1 3/8" | -0.003" to 0" | 00000000 | |||
| 1 1/2" | -0.003" to 0" | 0000000 | |||
| 1 5/8" | -0.004" to 0" | 00000000 | |||
| 1 3/4" | -0.004" to 0" | 00000000 | |||
| 2" | -0.004" to 0" | 0000000 | |||
| 2 1/2" | -0.004" to 0" | 0000000 | |||
| 5mm | -0.05mm to 0mm | 0000000 | |||
| 6mm | -0.05mm to 0mm | 0000000 | |||
| 7mm | -0.05mm to 0mm | 0000000 | |||
| 8mm | -0.05mm to 0mm | 0000000 | |||
| 10mm | -0.05mm to 0mm | 0000000 | |||
| 12mm | -0.05mm to 0mm | 0000000 | |||
| 13mm | -0.05mm to 0mm | 0000000 | |||
| 15mm | -0.05mm to 0mm | 0000000 | |||
| 18mm | -0.05mm to 0mm | 0000000 | |||
| 19mm | -0.05mm to 0mm | 0000000 | |||
| 20mm | -0.05mm to 0mm | 0000000 | |||
| 22mm | -0.08mm to 0mm | 0000000 | |||
| 25mm | -0.08mm to 0mm | 0000000 | |||
| 50mm | -0.1mm to 0mm | 0000000 |
Ultra-Machinable 12L14 Carbon Steel Hex Bars
- Yield Strength: 60,000 psi
- Hardness: Rockwell B85 (Medium)
- Heat Treatable: Yes
- Max. Hardness After Heat Treatment: Rockwell C60
- Specifications Met: ASTM A108
The lead additive acts as a lubricant, which allows 12L14 carbon steel to withstand very fast machining. It's used to fabricate a wide variety of machine parts.
For technical drawings and 3-D models, click on a part number.
| Wd. | Wd. Tolerance | 1 ft. Lg. | 3 ft. Lg. | 6 ft. Lg. | |
| 3/16" | -0.002" to 0" | 00000000 | |||
| 1/4" | -0.002" to 0" | 00000000 | |||
| 5/16" | -0.002" to 0" | 00000000 | |||
| 3/8" | -0.002" to 0" | 00000000 | |||
| 7/16" | -0.002" to 0" | 00000000 | |||
| 1/2" | -0.002" to 0" | 00000000 | |||
| 9/16" | -0.002" to 0" | 00000000 | |||
| 5/8" | -0.002" to 0" | 00000000 | |||
| 11/16" | -0.002" to 0" | 00000000 | |||
| 3/4" | -0.002" to 0" | 00000000 | |||
| 13/16" | -0.003" to 0" | 00000000 | |||
| 7/8" | -0.003" to 0" | 0000000 | |||
| 15/16" | -0.003" to 0" | 00000000 | |||
| 1" | -0.003" to 0" | 0000000 | |||
| 1 1/8" | -0.003" to 0" | 00000000 | |||
| 1 1/4" | -0.003" to 0" | 0000000 | |||
| 1 3/8" | -0.003" to 0" | 0000000 | |||
| 1 1/2" | -0.003" to 0" | 0000000 | |||
| 1 3/4" | -0.004" to 0" | 0000000 | |||
| 2" | -0.004" to 0" | 0000000 | |||
| 3" | -0.005" to 0" | 0000000 |
Easy-to-Machine 1215 Carbon Steel Hex Bars
- Yield Strength: 60,000 psi
- Hardness: Rockwell B85 (Medium)
- Heat Treatable: Yes
- Max. Hardness After Heat Treatment: Not Rated
- Specifications Met: ASTM A108
A lead-free alternative to 12L14, 1215 carbon steel contains the same amount of sulfur and phosphorus for excellent machinability. It is often used for shaft couplings, studs, and pins.
For technical drawings and 3-D models, click on a part number.
| Wd. | Wd. Tolerance | 1 ft. Lg. | 3 ft. Lg. | 6 ft. Lg. | |
| 1/4" | -0.002" to 0" | 0000000 | |||
| 3/8" | -0.002" to 0" | 0000000 | |||
| 1/2" | -0.002" to 0" | 0000000 | |||
| 9/16" | -0.002" to 0" | 0000000 | |||
| 5/8" | -0.002" to 0" | 0000000 | |||
| 11/16" | -0.002" to 0" | 0000000 | |||
| 3/4" | -0.002" to 0" | 0000000 | |||
| 13/16" | -0.003" to 0" | 0000000 | |||
| 7/8" | -0.003" to 0" | 0000000 | |||
| 15/16" | -0.003" to 0" | 0000000 | |||
| 1" | -0.003" to 0" | 0000000 | |||
| 1 1/2" | -0.003" to 0" | 0000000 | |||
| 2" | -0.004" to 0" | 0000000 | |||
| 2 1/2" | -0.004" to 0" | 0000000 | |||
| 3" | -0.005" to 0" | 0000000 |
Hardened Multipurpose 4140 Alloy Steel Hex Bars
- Yield Strength: 105,000 psi
- Hardness: Rockwell C35 (Hard)
- Specifications Met: ASTM A193, ASTM A29
These hex bars are hardened for increased abrasion and impact resistance. They are also stress relieved to reduce the chance of warping during machining. 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.
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 ACTIVITY after your order ships.
| Wd. | Wd. Tolerance | Heat Treatment | 1 ft. Lg. | 3 ft. Lg. | 6 ft. Lg. | |
| 5/8" | -0.01" to 0.01" | Hardened, Stress Relieved | 0000000 | |||
| 3/4" | -0.01" to 0.01" | Hardened, Stress Relieved | 0000000 | |||
| 7/8" | -0.01" to 0.01" | Hardened, Stress Relieved | 0000000 | |||
| 1" | -0.01" to 0.01" | Hardened, Stress Relieved | 0000000 | |||
| 1 1/8" | -0.013" to 0.021" | Hardened, Stress Relieved | 0000000 | |||
| 1 1/4" | -0.013" to 0.021" | Hardened, Stress Relieved | 0000000 | |||
| 1 3/8" | -0.013" to 0.021" | Hardened, Stress Relieved | 0000000 | |||
| 1 1/2" | -0.013" to 0.021" | Hardened, Stress Relieved | 0000000 | |||
| 1 3/4" | -0.016" to 0.031" | Hardened, Stress Relieved | 0000000 | |||
| 2" | -0.016" to 0.031" | Hardened, Stress Relieved | 0000000 |
Multipurpose 4140 Alloy Steel Hex Bars
- Yield Strength: 60,000 psi
- Hardness: Rockwell B90 (Medium)
- Heat Treatable: Yes
- Max. Hardness After Heat Treatment: Not Rated
- Specifications Met: ASTM A108, ASTM A304
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.
For technical drawings and 3-D models, click on a part number.
| Wd., mm | Wd. Tolerance, mm | Heat Treatment | 1 ft. Lg. | 3 ft. Lg. | 6 ft. Lg. | |
| 5 | -0.051 to 0 | Annealed (Softened) | 000000 | |||
| 7 | -0.051 to 0 | Annealed (Softened) | 000000 | |||
| 10 | -0.051 to 0 | Annealed (Softened) | 000000 | |||
| 12 | -0.051 to 0 | Annealed (Softened) | 000000 | |||
| 15 | -0.051 to 0 | Annealed (Softened) | 000000 | |||
| 20 | -0.013 to 0 | Annealed (Softened) | 000000 | |||
| 27 | -0.013 to 0 | Annealed (Softened) | 000000 | |||
| 50 | -0.102 to 0 | Annealed (Softened) | 000000 |