SAE/AISI 4815 Alloy Steel (UNS G82150)
SAE/AISI 4815 is a low-alloy nickel steel that is known for its good strength, toughness, and hardenability. It is typically used in applications where high strength and wear resistance are required, such as gears, shafts, and bearings.
| Chemical Composition | ||
|---|---|---|
| Element | Min | Max |
| Iron | 94.795% | 95.87% |
| Carbon | 0.13% | 0.18% |
| Manganese | 0.40% | 0.60% |
| Molybdenum | 0.20% | 0.30% |
| Nickel | 3.25% | 3.75% |
| Phosphorous | 0.035% | |
| Silicon | 0.15% | 0.30% |
| Sulfur | 0.04% | |
The following table provides a list of SAE/AISI 4815 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) | 550 MPa |
| Tensile Strength (Yield) | 370 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 | 170 |
| Thermal Properties | Metric |
| Thermal Conductivity | 44.5 W/m·K |
| Specific Heat Capacity (Cp) | 470 J/kg·K |
| Coefficient of Thermal Expansion (αL) | 1.2×10-5 1/°C |
| Electrical Properties | Metric |
| Electrical Conductivity | 3.83×106 S/m |
| Electrical Resistivity | 2.61×10-7 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 4815 Alloy Steel
| Advantages | Disadvantages |
|---|---|
| High strength | More expensive than carbon steel |
| High Toughness | More difficult to weld than carbon steel |
| Corrosion resistance | Can be susceptible to hydrogen embrittlement |
| Heat resistance | Can be difficult to machine |
Applications of 4815 Alloy Steel
AISI 4815 steel is a low-alloy steel that is known for its high strength and toughness. It is also resistant to corrosion and heat, making it a good choice for a variety of applications. Some of the most common applications of 4815 steel include:
- Boiler and furnace components: 4815 steel is used in a variety of components in boilers and furnaces, such as tubes, headers, and drums.
- Pressure vessels: 4815 steel is used in pressure vessels, such as storage tanks and reactors.
- Gears: 4815 steel is used in gears that require high strength and toughness, such as those used in heavy machinery.
- Shafts: 4815 steel is used in shafts that require high strength and toughness, such as those used in engines and turbines.
- Tools: 4815 steel is used in tools that require high strength and toughness, such as hammers and wrenches.
- Machinery: 4815 steel is used in machinery that requires high strength and toughness, such as lathes and milling machines.
- Automotive parts: 4815 steel is used in automotive parts that require high strength and toughness, such as axles and crankshafts.
- Welding electrodes: 4815 steel is used in welding electrodes that require high strength and toughness, such as those used in shipbuilding and construction.