SAE/AISI 6150 Alloy Steel (UNS G61500)
SAE/AISI 6150 is a chromium vanadium alloy steel that is commonly used in heavily stressed machinery parts, including shafts, gears, and pinions. It is also used in hand tool components and in the automotive industry.
| Chemical Composition | ||
|---|---|---|
| Element | Min | Max |
| Iron | 97.095% | 97.72% |
| Carbon | 0.48% | 0.53% |
| Chromium | 0.80% | 1.10% |
| Manganese | 0.70% | 0.90% |
| Phosphorous | 0.035% | |
| Silicon | 0.15% | 0.30% |
| Sulfur | 0.04% | |
| Vanadium | 0.15% | |
The following table provides a list of SAE/AISI 6150 properties in both SI and US customary/Imperial units.
Click on the icon to switch between Metric and Imperial units.
| Physical Properties | Metric |
|---|---|
| Density | 7850 kg/m3 |
| Mechanical Properties | Metric |
| Tensile Strength (Ultimate) | 670 MPa |
| Tensile Strength (Yield) | 415 MPa |
| Young’s Modulus (E) | 190 - 210 GPa |
| Bulk Modulus (K) | 140 GPa |
| Shear Modulus (G) | 80 GPa |
| Elongation at Break | 23% |
| Poisson’s Ratio (ν) | 0.27 - 0.30 |
| Brinell Hardness | 197 |
| Thermal Properties | Metric |
| Thermal Conductivity | 46.6 W/m·K |
| Specific Heat Capacity (Cp) | 470 J/kg·K |
| Coefficient of Thermal Expansion (αL) | 1.25×10-5 1/°C |
| Electrical Properties | Metric |
| Electrical Conductivity | 4.23×106 S/m |
| Electrical Resistivity | 2.36×10-7 Ω·m |
The values in this table are approximate and can vary depending on various factors such as the specific manufacturing process and heat treatment applied to the alloy.
Advantages & Disadvantages of 6150 Alloy Steel
| Advantages | Disadvantages |
|---|---|
| High strength and toughness | Relatively high cost compared to standard steels |
| Good wear resistance | Requires proper heat treatment for optimum properties |
| Excellent fatigue strength | Limited availability in some regions |
| Enhanced hardenability | Prone to distortion during heat treatment |
| Suitable for high-stress applications | Susceptible to corrosion without proper protection |
Applications of 6150 Alloy Steel
AISI 6150 steel finds application in various industries and is well-suited for components that require high strength, toughness, and wear resistance. Here are some common applications of AISI 6150 steel:
- Springs: AISI 6150 steel is widely used in the manufacturing of helical and flat springs, including automotive suspension springs, valve springs, clutch springs, and various mechanical springs that require high strength and resilience.
- Automotive Components: This steel is utilized in the production of automotive components such as leaf springs, coil springs, stabilizer bars, torsion bars, and other critical parts that endure high stress and heavy loads.
- Gears and Gear Shafts: AISI 6150 steel's excellent toughness and wear resistance make it suitable for manufacturing gears, pinions, camshafts, and other power transmission components that operate under high loads and sliding contact conditions.
- Crankshafts: The high strength, fatigue resistance, and hardness of AISI 6150 steel make it a preferred choice for manufacturing crankshafts in engines, where it can withstand the high cyclic loading and bending forces.
- Axles and Shafts: This steel is commonly used for producing axles, drive shafts, and other shafts in heavy-duty machinery, construction equipment, and transportation vehicles.
- Tooling and Dies: AISI 6150 steel's good toughness and wear resistance make it suitable for certain tool and die applications, including punches, dies, and forming tools.
- Blades and Cutting Tools: The combination of high hardness and toughness in AISI 6150 steel makes it applicable for certain types of blades, cutting tools, and knives that require durability and edge retention.
- Firearms Components: AISI 6150 steel is occasionally used in the construction of firearm components like trigger springs, firing pins, and other critical parts where high strength and resilience are desired.