SAE/AISI 8617 Alloy Steel (UNS G86170)
SAE/AISI 8617 is a low-alloy steel that combines high strength, hardness, and ductility with excellent corrosion, heat, and wear resistance. Its balanced properties make it ideal for machining and fabricating components across various industries requiring durability and reliability.
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| Chemical Composition | ||
|---|---|---|
| Element | Min | Max |
| Iron | 96.98% | 98.05% |
| Carbon | 0.15% | 0.20% |
| Chromium | 0.40% | 0.60% |
| Manganese | 0.70% | 0.90% |
| Molybdenum | 0.15% | 0.25% |
| Nickel | 0.40% | 0.70% |
| Phosphorous | —— | 0.035% |
| Silicon | 0.15% | 0.30% |
| Sulfur | —— | 0.04% |
The following table provides a list of SAE/AISI 8617 properties in both SI and US customary/Imperial units.
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| Physical Properties | Metric |
|---|---|
| Density | 7700 - 8030 kg/m3 |
| Mechanical Properties | Metric |
| Young’s Modulus (E) | 190 - 210 GPa |
| Bulk Modulus (K) | 140 GPa |
| Shear Modulus (G) | 80 GPa |
| Poisson’s Ratio (ν) | 0.27 - 0.30 |
| Thermal Properties | Metric |
| Thermal Conductivity | 46.6 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 | 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 8617 Alloy Steel
| Advantages | Disadvantages |
|---|---|
| High strength | More expensive than other types of steel |
| Good machinability | More difficult to weld than other types of steel |
| Good corrosion resistance | Can be brittle in some applications |
| Good wear resistance |
Applications of 8617 Alloy Steel
AISI 8617 steel is widely utilized across multiple industries, offering strength and versatility in applications including:
- Automotive Industry: Used to manufacture gears, shafts, and other essential components.
- Aerospace Industry: Applied in the production of fasteners, turbine blades, and related parts.
- Medical Industry: Employed in implants and various medical devices.
- Construction Industry: Utilized for structural components such as beams and columns.