Smart Spring: NiTi (Smart Material)

Product Code : SCL-CLE-12855

Quick Answer: The Smart Spring: NiTi (Smart Material) is a spring made from shape memory alloy that can be pulled out to about 50mm at room temperature and contracts to its original length when heated to 70°C.

Last updated: October 2026

Key Features

• Made from shape memory alloy (SMA)
• Soft enough at room temperature to pull out to about 50mm with a small force
• Contracts to its original length when heated to 70°C
• Can be heated by passing a small electric current through it
• Pulling force on contraction equivalent to lifting a 0.5kg weight

Technical Specifications

About This Product

A shape memory alloy can be heat-treated so that it 'remembers' a shape and returns to it when warmed. This spring is soft at room temperature, and when it is heated to 70°C, for example by passing a small electric current through it, it contracts with a pulling force equivalent to lifting a 0.5kg weight. It shows the behaviour of a shape memory alloy as a smart material.

Frequently Asked Questions

At what temperature does the smart spring contract?

When heated to 70°C, for example by passing an electric current through it, the spring contracts to its original length.

How strong is the pulling force of the spring?

On contracting, the spring gives a pulling force equivalent to lifting a 0.5kg weight.

What are the dimensions of the spring?

It measures 20mm when closed, with a 5.5mm external diameter and a 4mm internal diameter, and weighs 1.1g.

Related: Chemistry Lab Equipment, Smart Wire (Smart Material), NiTi Memory Wire, Smart Metals Sample Pack (Smart Material).

For a quotation on the Smart Spring: NiTi (Smart Material), contact School Lab China.