SAE/AISI 6150 Alloy Steel (UNS G61500)
SAE/AISI 6150 is a chromium-vanadium alloy steel renowned for its high strength, toughness, and wear resistance. Commonly utilized in heavily stressed machinery components such as shafts, gears, and pinions, it also serves critical roles in hand tools and automotive parts, delivering reliable performance under demanding conditions.
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| 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 is widely applied across industries for components requiring superior strength, toughness, and wear resistance, including:
- Springs: Widely used in manufacturing helical and flat springs such as automotive suspension, valve, clutch, and mechanical springs requiring high strength and resilience.
- Automotive Components: Employed in leaf springs, coil springs, stabilizer bars, torsion bars, and other critical parts subject to high stress and heavy loads.
- Gears and Gear Shafts: Suitable for manufacturing gears, pinions, camshafts, and power transmission components operating under high loads and sliding contact conditions due to excellent toughness and wear resistance.
- Crankshafts: Preferred for engine crankshafts because of its high strength, fatigue resistance, and hardness to withstand cyclic loading and bending forces.
- Axles and Shafts: Commonly used in producing axles, drive shafts, and other shafts in heavy-duty machinery, construction equipment, and transportation vehicles.
- Tooling and Dies: Applied in certain tooling and die applications such as punches, dies, and forming tools owing to good toughness and wear resistance.
- Blades and Cutting Tools: Used for blades, cutting tools, and knives requiring durability and edge retention due to a combination of high hardness and toughness.
- Firearms Components: Occasionally used in firearm parts like trigger springs and firing pins where high strength and resilience are essential.