I n t r i n s i c  D e v i c e s  I n c o r p o r a t e d


Alloy Selection

We offer products in a variety of nickel-titanium alloys to tailor the thermo-mechanical performance to specific applications.  Alloys C and H are typically used for permanent  fastening in extreme temperature environments.  Alloys D is used for permanent and demateable fastening in more benign thermal environments.  Alloys N and G are used for actuators and temporary clamping applications.

Alloy C components are shipped and stored in liquid nitrogen.  They recover to their memory shape on warming to room temperature.  This is a benefit when working with large assemblies or extremely heat sensitive components.  Alloy C applies clamping force over an operating temperature range of -65°C to +300°C.

Alloy H is our most broadly used alloy for fastening and sealing applications.   The alloy begins to recover at about 50°C and reaches full clamping force at 165°C.  Once installed, Alloy H parts maintain clamping force over a temperature range of -65°C to +300°C.  Cooling parts to below -120°C with liquid nitrogen will cause them to loosen their grip for disassembly or adjustment.

Alloy D is used for fastening applications with less demanding operating temperatures.  This alloy begins to recover at about 40°C, reaches full clamping force at 100°C and offers an operating range of 0°C to 200°C.  The low recovery temperature necessitates extra care in shipping and handling of Alloy D parts prior to installation.  Since Alloy D only requires heating to 100°C for installation, it can be installed on some assemblies Alloy H cannot.  Another potential advantage of this alloy is that it loosens at -50°C, allowing removal with HFC spray refrigerant or dry ice.

Alloy G starts recovery at 105°C, reaching full recovery stress at 160°C.  The recovery stress relaxes to zero when the part cools back down to 25°C.  The alloy has a sharp temperature response that makes it especially well suited to use as an actuator to drive a mechanism in response to elevated ambient temperature.

Alloy N starts recovery at 130°C, reaching full recovery stress at 185°C.  The recovery stress relaxes to zero when the part cools back down below 45°C.  The alloy has a sharp temperature response that makes it especially well suited to use as an actuator to drive a mechanism in response to elevated ambient temperature.

 

On this website you will only find drawings for heat shrinkable rings produced with Alloy H. We produce standard and custom parts from these other alloys as well. Please contact us for additional documentation.

  memory metal shrink ring clamps servometer electroformed bellows to steel cylinder
 
UniLok shrink ring attaches a gold plated electrodeposited nickel bellows contact to a steel pin
  cryocon tinel clamp ring actuated electrical contact
 
UniLok ring drives a zero insertion force, multi-cycle electrical connector
home
alloy selection
configurations
technology
active fasteners
history
links & papers
sales terms
contact
UniLok®
overview
applications
AHE drawing
BHE drawing
part numbering
installation
clamping force
AHM drawing
BHM drawing
material properties

 

Copyright 2003 Intrinsic Devices, Inc. All rights reserved.
UniLok® is a registered trademark of Intrinsic Devices, Inc.