SAE/AISI 8615 Alloy Steel (UNS G86150)

Image of SAE/AISI 8615 bars

SAE/AISI 8615 is a nickel-chromium-molybdenum alloy steel that is known for its high strength, toughness, and hardenability. It is a versatile material that can be used for a variety of applications, including gears, shafts, bolts, and other high-stress components.

Chemical Composition
ElementMinMax
Iron96.995%98.07%
Carbon0.13%0.18%
Chromium0.40%0.60%
Manganese0.70%0.90%
Molybdenum0.15%0.25%
Nickel0.40%0.70%
Phosphorous0.035%
Silicon0.15%0.30%
Sulfur0.04%

The following table provides a list of SAE/AISI 8615 properties in both SI and US customary/Imperial units.

Click on the icon to switch between Metric and Imperial units.

Table of SAE/AISI 8615 Properties
Physical Properties
Metric
Density7700 - 8030 kg/m3
Mechanical PropertiesMetric
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 PropertiesMetric
Thermal Conductivity46.6 W/m·K
Specific Heat Capacity (Cp)470 J/kg·K
Coefficient of Thermal Expansion (αL)1.3×10-5 1/°C
Electrical PropertiesMetric
Electrical Conductivity4.23×106 S/m
Electrical Resistivity2.36×10-7 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 8615 Alloy Steel

AdvantagesDisadvantages
Good strength and toughnessMore expensive than carbon steel
Resistant to fatigue and corrosionMore difficult to weld than carbon steel
Can be heat treated to improve propertiesMore difficult to machine than carbon steel

Applications of 8615 Alloy Steel

8615 steel is a good choice for a variety of demanding applications. It is strong, tough, and machinable, making it a versatile material that can be used in a variety of ways. Some common applications of AISI 8615 steel include:

  • Aerospace: 8615 steel is used in a variety of components in aircraft, including landing gear, gears, and shafts.
  • Automotive: 8615 steel is used in a variety of components in automobiles, including engine blocks, crankshafts, and axles.
  • Machinery: 8615 steel is used in a variety of machinery components, including gears, shafts, and bearings.
  • Construction: 8615 steel is used in a variety of construction components, including beams, columns, and plates.
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