4140 Hot Rolled SBQ Bar
Hot rolled 4140 steel bar is a medium-carbon alloy steel that has a high hardenability. This grade is also widely used for forging. Hot rolled 4140 steel also has good fatigue and impact resistance after heat treating. Eaton Steel Bar Company stocks various diameters of 4140 hot rolled steel to meet the market demands. We also supply 4140 hot rolled round bar to various industries like ATV, automotive, firearm, and military.
4140 Steel Bar Applications
Typical applications for 4140 hot rolled round steel bar include:
- Drill Collars
- Pins
- Axles
- Bolts
- Shafts
- Firearm Components
- Spindles
4140 Hot Rolled Steel Bar Requirements
Eaton Steel Bar Company can meet the following specifications for this grade:
- ASTM A29
- ASTM A322
- JDM QL-2 certified
4140 Hot Rolled Round Steel Bar
Eaton Steel Bar Company supplies 4140 steel bar in a variety of sizes ranging from 7/16”-15”. The shapes available for this grade include:
***Minimum Total Quantity Per Order is 10,000 lbs.***
Standard "4140 Grade" Chemical Composition
| Carbon | 0.38-0.43 |
| Manganese | 0.75-1.00 |
| Phosphorus (max) | 0.035 |
| Sulfur (max) | 0.040 |
| Silicon | 0.15-0.35 |
| Chromium | 0.80-1.10 |
| Molybdenum | 0.15-0.25 |
Estimated Mechanical Property Ranges for "Grade 4140"
| Tensile strength (psi) | 95,000 - 105,000 |
| Yield strength (psi) | 65,000 - 75,000 |
| Elongation in 2” (%) | 20 - 30 |
| Reduction of area (%) | 35 - 45 |
| Brinell Hardness (BHN) | 200 - 230 |
Interested in Eaton Steel's Hot Rolled Catalog?
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