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Allegheny Ludlum Stainless Steel Ohmaloy® 40 Resistance Alloy, UNS K91470

 

Subcategory: Electronic/Magnetic Alloy

Material Notes:
Iron content above calculated as remainder.

Ohmaloy 40 alloy is a moderately magnetic, ductile stainless steel having extremely high electrical resistivity. In addition to imparting high electrical resistivity, the aluminum content in these iron-13% chromium-aluminum resistance alloys also provides oxidation resistance. This alloy are capable of resisting oxidation for continuous duty at temperature up to 982 degrees Celsius, and is satisfactory for intermittent heating in temperatures form 982 to 1038 degrees Celsius. This alloy is used in many applications requiring dissipation of electrical energy. Some examples are grid resistors for mine locomotives, crane starters and, the largest application, braking resistors for railroad diesel locomotives. This alloy is used where the application demands heavy-duty resistors with a small volume-to-volume ratio. They can also be used in applications where resistance heating is required.

Information provided by Allegheny Ludlum

Available Properties
  • Density
  • Hardness, Rockwell B
  • Tensile Strength, Ultimate
  • Tensile Strength, Yield
  • Elongation at Break
  • Electrical Resistivity
  • CTE, linear 20°C
  • CTE, linear 500°C
  • CTE, linear 1000°C
  • Thermal Conductivity
   
Property Data

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