SAE/AISI 4615 Alloy Steel (UNS G43350)
SAE/AISI 4615 is a nickel-molybdenum steel that is known for its good strength, toughness, and machinability. It is a versatile material that is used in a wide variety of applications, including automotive parts, gears, shafts, and fasteners.
| Chemical Composition | ||
|---|---|---|
| Element | Min | Max |
| Iron | 96.495% | 97.42% |
| Carbon | 0.13% | 0.18% |
| Manganese | 0.45% | 0.65% |
| Molybdenum | 0.20% | 0.30% |
| Nickel | 1.65% | 2.0% |
| Phosphorous | 0.035% | |
| Silicon | 0.15% | 0.30% |
| Sulfur | 0.04% | |
The following table provides a list of SAE/AISI 4615 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 |
| Young’s Modulus (E) | 205 GPa |
| Bulk Modulus (K) | 140 GPa |
| Shear Modulus (G) | 80 GPa |
| Poisson’s Ratio (ν) | 0.29 |
| Brinell Hardness | 170 - 212 |
| Thermal Properties | Metric |
| Thermal Conductivity | 44.5 W/m·K |
| Specific Heat Capacity (Cp) | 470 J/kg·K |
| Coefficient of Thermal Expansion (αL) | 1.1×10-5 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 4615 Alloy Steel
| Advantages | Disadvantages |
|---|---|
| High strength and toughness | Relatively high cost compared to carbon steels |
| Excellent hardenability | Requires precise heat treatment for optimal properties |
| Good wear resistance | Limited availability and potential lead times |
| High impact toughness | Lower corrosion resistance compared to stainless steels |
| Versatile for various applications | Can be more challenging to machine than softer steels |
Applications of 4615 Alloy Steel
AISI 4615 steel, known for its high strength, toughness, and wear resistance, finds application in various industries. Here are some common applications of AISI 4615 steel:
- Gears and Gear Shafts: AISI 4615 steel’s excellent combination of hardness and toughness makes it well-suited for manufacturing gears and gear shafts.
- Axles and Shafts: Due to its high strength and impact toughness, AISI 4615 steel is used in the production of axles and shafts.
- Bolts and Fasteners: AISI 4615 steel’s high strength and wear resistance make it suitable for manufacturing bolts, screws, and other fasteners.
- Machine Components: AISI 4615 steel is utilized in the production of various machine components, such as crankshafts, camshafts, and couplings.
- Tooling and Die Components: The wear resistance and toughness of AISI 4615 steel make it suitable for tooling and die applications.
- Automotive Parts: AISI 4615 steel is employed in the automotive industry for manufacturing parts like transmission components, steering components, and suspension parts.
- Construction and Heavy Equipment: AISI 4615 steel is used in the construction and heavy equipment industry for various components, such as shafts, pins, and structural parts.