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Memry’s Nitinol Alloys and Superalloys

Memry is among the largest melters of nitinol, but also the most highly specialized when it comes to test melts of experimental alloys (binary, ternary, quaternary and beyond) where multiple elements are added (Co, Cr, Cu, Fe, Pt etc.). Such alloys can be lighter, smoother, more flexible or stiffer than the standard nitinol, depending on your needs.

We also melt superalloys, encompassing a broad chemistry population which includes (but is not limited to) pure Co, Fe, Al, modified 718 (NiCR alloy), Fe-based alloys, Ni7V, FeNi, 702 (Ni-Cr alloy), CoNi, UMCO 50 (Co-based) and Vicalloy. Our superalloys generally involve relatively small heats (30 to 2000 lbs) of standard and custom chemistries.

Following is an overview of Memry´s nitinol alloy specifications. Customized alloys can be created in collaboration with customers. Please contact us to discuss the alloy your next project requires.

Nitinol alloys

Superelastic nitinol alloy

  • Typical Target As (austenite start temperature), fully annealed, measured by DSC=-15ºC, -10ºC and -5ºC.
  • Ap (austenite peak temperature), fully annealed, measured by DSC is on average 10ºC warmer than As
  • Af (austenite finish temperature), fully annealed, measured by DSC is on average 15ºC warmer than As
  • Chemistry: Per ASTM F 2063

High-strength superelastic nitinol alloy

  • Target As (austenite start temperature), fully annealed, measured by DSC= -25ºC and -50ºC
  • Ap (austenite peak temperature), fully annealed, measured by DSC is on average 10ºC warmer than As
  • Af (austenite finish temperature), fully annealed, measured by DSC is on average 15ºC warmer than As
  • Chemistry: Per ASTM F-2063

High-temperature shape memory nitinol alloy

  • Typical Target As (austenite start temperature), fully annealed, measured by DSC= +55ºC, +70ºC and +95ºC.
  • Ap (austenite peak temperature), fully annealed, measured by DSC is on average 10ºC warmer than As
  • Af (austenite finish temperature), fully annealed, measured by DSC is on average 15ºC warmer than As
  • Chemistry: Per ASTM F-2063

Body-temperature nitinol alloy

  • Typical Target As (austenite start temperature), fully annealed, measured by DSC= 0ºC, +5ºC and +30ºC.
  • Ap (austenite peak temperature), fully annealed, measured by DSC is on average 10ºC warmer than As
  • Af (austenite finish temperature), fully annealed, measured by DSC is on average 15ºC warmer than As
  • Chemistry: Per ASTM F-2063

Chrome-doped superelastic nitinol alloy

  • Typical Target As (austenite start temperature), fully annealed, measured by DSC=-60ºC, -30ºC, -20ºC
  • Ap (austenite peak temperature), fully annealed, measured by DSC is on average 10ºC warmer than As
  • Af (austenite finish temperature), fully annealed, measured by DSC is on average 15ºC warmer than As
  • Chemistry: Per ASTM: F-2063, expect Cr 0.2% to 0.3

High-strength superelastic Ni-Ti-Fe alloy

  • Typical Target As (austenite start temperature), fully annealed, measured by DSC= -25ºC, -10ºC
  • Ap (austenite peak temperature), fully annealed, measured by DSC is on average 10ºC warmer than As
  • Af (austenite finish temperature), fully annealed, measured by DSC is on average 15ºC warmer than As
  • Chemistry: Per ASTM F 2063, except Fe 1.0% to 2.0%

High stiffness Ni-Ti-Co alloy

For engineers seeking a material which blends the flexibility of binary Nitinol with the increased need for stiffness, NiTiCo provides additional degrees of design freedom for the most demanding interventional devices. 

  • Typical Target As (austenite start temperature), fully annealed, measured by DSC= -80ºC
  • Ap (austenite peak temperature), fully annealed, measured by DSC is on average 10ºC warmer than As
  • Af (austenite finish temperature), fully annealed, measured by DSC is on average 15ºC warmer than As
  • Chemistry: Per ASTM 2063 except Co 1.0% to 2.0%

NiTiCo is 40% stiffer than binary NiTi and provides enhanced pushability as well as superior torque control for applications, such as:

  • Interventional Guidewires
  • Embolic Protection Devices
  • Implant Delivery Systems 

Narrow hysteresis Ni-Ti-Cu alloy

  • Typical Target As (austenite start temperature), fully annealed, measured by DSC= +70ºC to +75 ºC
  • Ap (austenite peak temperature), fully annealed, measured by DSC is on average 10ºC warmer than As
  • Af (austenite finish temperature), fully annealed, measured by DSC is on average 15ºC warmer than As
  • Chemistry: Per ASTM 2063 except Cu 6.0% to 7.0%