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Your cart is empty.5 feet (1.5 meters) of 1mm diameter Nitinol SMA (shape memory alloy) wire. One of our favorites due to a comfortable warm, not-too-hot transition phase. This wire will become rigid and return to straight when exposed to temperatures above 40 C (hot water, lighter, heat gun, etc). Yes - it comes pre-trained STRAIGHT from the factory which is how you want it. You can re-train it if you want by heating it (500 C for 45 minutes) in the new desired shape. The wire has a lustrous titanium color (dark grey) with a bluish oxide tint on its surface. When freshly cut, the inner core is nickel white. Nitinol is very abrasion resistant and has self-healing properties, so the wire is quite hard to cut and kink. It feels very smooth and shiny to the touch. It does not require any special handling or protections from oxidation or moisture, and is non-toxic. Do not over heat it, as that will damage the property. If you are using electricity instead of hot water to activate it be sure to use a current limiting circuit.
Larry
Reviewed in the United States on June 19, 2024
Used these for a phase transitions lab and they worked perfectly. The low temp transition worked great for K-12 students. Because it’s shape set straight and to have enough for each student, we cut into ~2” pieces with a wire cutter. Will definitely buy again.
Natasha
Reviewed in the United States on February 7, 2024
Love this - does exactly what it says and is keeping my 9 year old very amused!
rbeal
Reviewed in the United States on November 29, 2024
Worth the exploration
Chris and Holly
Reviewed in Canada on January 26, 2024
Works just like it should. Been having lots of fun playing around with it
Ntre
Reviewed in the United States on January 10, 2024
Very strange metal. Actually does seem to have a memory! May have to buy more of this.
Adam
Reviewed in the United States on September 5, 2023
I bought this as a science lesson for my child. The material comes wound in circle but the shape memory is straight. If you run it under warm water it will become a straight piece of wire :) So cool. I can't wait to create set a new shape memory at 1000°F.
jamie oxenreider
Reviewed in the United States on September 26, 2023
Does what you would expect.
Lyle
Reviewed in the United States on August 5, 2023
It bends very easy and it does not return back to it original show before any pressure was applied
G. cone
Reviewed in the United States on November 4, 2023
Kids loved it.
Customer
Reviewed in Canada on December 25, 2021
Product came as advertised
Soy Yo :) y familia.
Reviewed in Spain on July 11, 2018
Se me ocurrió tirar agua hirviendo encima y del salto que pego lo he perdido, voy a pedir otro porque me he quedado con ganas de mas.
Richard Humery
Reviewed in France on June 7, 2018
Je connais le Nitinol, mais j'attendais de cet achat une notice explicative pour savoir comment pré-contraindre une forme.Là, rien ! Un sachet plastique, avec le fil à l'intérieur et dem..dez vous.Aucune info sur les températures de contrainte et celle de retour à la forme contrainte.Très déçu.
Customer
Reviewed in the United Kingdom on August 6, 2017
This arrived ahead of schedule and well packaged (although it is fairly indestructible so just an address label would probably have sufficed). BTW The online tracking provided by the carrier was very misleading.I received 31cm of 1mm diameter wire. When bent and then put in boiling water it straightened so I clearly got what I had ordered (I suspect the 40degC it stated was a bit out. The bag indicates a 10degC tolerance and I think my bit transitions closer to 50-60 C)However, this is sold as "muscle wire" - the clear implication being that the main use-case is for it to be electrically heated. My foot of it appears to have a resistance of about half an ohm. Using a bench power supply with a current limit it needs about 2v / 4a to slowly get warm (at which it does seem to transition), so i would comment that this format is not ideal for use as an electrical actuator. A thinner version would be much more convenient for the voltage / current regime likely to be present in the average project. Otherwise some sort of step down with chunky switching transistors and big inductors/capacitors is going to be needed. Along with much bigger restoration forces.It is nice that it is provided in arbitrary lengths and that there are "cool" options available.since i ordered mine, they have started doing half the diameter which is likely better, though still a bit low resistance.
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