What are 4140/4150 Steel Bars?
TensalloyTM 4140 Round Bars and 4150 Round Bars are special turned, ground, and polished steel designed for applications where stress and shock resistance are vital. There are some differences between 4140 and 4150, read our blog post to learn more. The biggest difference is the carbon content, which affects hardenability. A 4140 grade of steel has a nominal 0.40% carbon content, while 4150 has a nominal 0.50% carbon content. The carbon contents are produced with a +3/-2 point range. For example, 4140 can have a carbon range between 0.38% to 0.43%. Clifton Steel representatives can help determine which grade is more beneficial for your project.
Advantages
- Extended service life compared to carbon steel bars
- High shock and stress resistance
Tolerances
Standard Diameter tolerances
- Hot roll – ASTM A322
- Cold finished – ASTM A108
- Can be furnished to customer specifications
4150 Steel Bar Specifications
All 4150 Steel Bar supplied meets ASTM A322 standards
Chemical Composition
| Carbon | 0.43 – 0.50 |
| Manganese | 0.60 – 0.90 |
| Phosphorus | 0.025 max |
| Sulfur | 0.020 max |
Mechanical Properties
| Yield Strength | 145,000 psi |
| Tensile Strength | 165,000 psi |
| Elongation (% in 2") | 20 |
| Grain Size | 95% of 8 on Shepard fracture grain-size standards |
Sizes
| 1/2" through 7" Diameter |
| Lengths 20 - 24 feet |
Hardness
28 – 32 Rc
Welding
Tensalloy™ 4140 and 4150 is compatible with Tensaweld Workmate and Tensaweld Nickel-90 welding wire.
Tolerances
Tensalloy™ is turned, ground, and polished and machined straightened.
Diameter tolerances are +0″, -.002″ with a fine 8 micro-finish or better
Special lengths, diameters, and tolerances can be furnished to customer specifications.