Multipurpose 4140 Alloy Steel Rod
2-1/8" Diameter



Diameter | 2 1/8" |
Diameter Tolerance | -0.004" to 0" |
Fabrication | Cold Worked |
Heat Treatment | Annealed |
Yield Strength | 60,000 psi |
Hardness | Rockwell C19 |
Hardness Rating | Medium |
Maximum Hardness After Heat Treatment | Rockwell C48 |
Specifications Met | ASTM A108 |
Appearance | Plain |
Application | Multipurpose |
Certificate Form | Digital |
Certificate Type | Material Certificate with Traceable Lot Number |
Coefficient of Thermal Expansion | 6.8 × 10^-6 |
Elongation | 15% |
Heat Treatable | Yes |
Material | 4140 Alloy Steel |
Tolerance Rating | Standard |
Length Tolerance | 0" to 1/8" |
Length Tolerance Type | Plus |
Material Composition | |
Carbon | 0.36% to 0.46% |
Chromium | 0.75% to 1.2% |
Iron | Remainder |
Manganese | 0.65% to 1.1% |
Molybdenum | 0.10% to 0.25% |
Phosphorus | 0.035% Max. |
Silicon | 0.15% to 0.40% |
Sulfur | 0.04% Max. |
Vanadium | 0.05% to 0.15% |
Maximum Temperature | 1,500° F |
Minimum Temperature | Not Rated |
Performance | High Strength, Machinable, High Temperature, Weldable, Made-to-Order |
Shape | Rod |
Straightness Tolerance | 1/8"/10 ft. |
Warning Message | Physical and mechanical properties are not guaranteed. They are intended only as a basis for comparison and not for design purposes. |
Country of Origin | United States |
DFARS Compliance | Specialty Metals Compliant (252.225-7008), Specialty Metals Compliant (252.225-7009) |
Export Control Classification Number (ECCN) | EAR99 |
REACH Compliance | REACH (EC 1907/2006) (06/27/2024, 241 SVHC) Compliant |
RoHS Compliance | RoHS 3 (2015/863/EU) Compliant |
Schedule B Number | 722850.5000 |
U.S.–Mexico–Canada Agreement (USMCA) Qualifying | No |
Additional Specifications |
When an off-the-shelf size won't do, we'll get you the exact dimensions you need.
Also known as chrome-moly steel, this versatile 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 added wear resistance, the surface can be hardened with heat treating.
Note: Rods may be made from either 4140 or 4142 alloy steel. They are interchangeable in most applications.
The information in this 3-D model is provided for reference only.

























