An age hardened super alloy with exceptional strength at high temperatures

Waspaloy lock nuts are known for their superb high strength at elevated temperatures. Waspaloy is a high performance nickel alloy combined with cobalt, chrome and molybdenum to create it’s unique combination of strength and high temperature stability.

Similar to that of Inconel 718 nuts, Waspaloy lock nuts exceed the strength and stability of Inconel 718 at elevated temperatures beyond 1400°F.  In addition, the oxidation resistance of Waspaloy nuts make it an ideal materials for high temperature applications like gas turbines engines, and a variety of other aerospace components. 

Resources: Waspaloy Torque Specs

 


Waspaloy Locknut Features and Beneifts

A waspaloy locknut resists loosening from vibrations and torque. One of the most common styles is a prevailing torque locknut. This kind of waspaloy locknut has a prevailing torque feature which deforms elastically, preventing it from freely spinning like a standard nut.

The two most common and reliable forms of prevailing torque locknuts are the flexloc style and the polymer insert lock nut. A waspaloy flexloc nut is all-metal in composition with a segmented collar that creates six “locking fingers,” that act as a spring. Waspaloy polymer insert lock nuts are often referred to as nylon insert locknuts, although various high performance polymers can be used for the screw threads to “bite into.” Both flexlock and polymer insert locknuts are available in both hexagonal and 12 point configurations.

 All Metal Flexloc Lock Nut          Flexloc Lock Nut  Polymer/Nylon Insert Lock Nut        Insert Lock Nut
  • Can be used at high temperatures
  • Distributes load evenly due to the fact that it is manufactured as one solid piece.
  • Is THE most reliable all-metal self-locking nut.
  • As it is all metal, it is best for high temperature or corrosive applications
  • One of the only all-metal lock nuts that is certified to 15 cycles of prevailing torque – which is military standard.
  • Overall the most reliable locknut, with the only limitation of application temperature
  • Best for low temp applications, typically less than 350°F
  • Various polymers inserts available (Nylon, Vespel, PVDF, etc.) for higher temp. or corrosive applications.
  • Excellent reusability – can reliably be re-used 15 times
  • Eliminates galling and cold-welding common with exotic alloys

Other all metal lock nuts available include the waspaloy stover and elliptical styles. Though these styles are often a cheaper initial cost, they are less reliable than the flexloc style. As these styles delivering less prevailing torque cycles and often result in more failures, the flexloc style is a better investment for both reliability and cost savings.


Waspaloy Chemistry & Specifications

Waspaloy is a solution annealed and age hardended alloy which provides its high strength properties. There are a few aging varieties however the AMS 5708 is one of the more common.

Waspaloy Specifications: UNS N07001, ASTM B 637, AMS 5708, AMS 5709, EN 2.4654

UNS N07001
Werkstoff 2.4654

Waspaloy Chemistry

 


Waspaloy Tensile Curve

Waspaloy Tensile Curve

 

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