This Smart Metals sample pack contains labelled samples of all the smart metals for evaluation supplied in a rigid plastic case.

• 1 x Smart Spring
• 1 x Two-Way Memory Spring
• 1 x Smart Wire 0.006 ‚¬ ³ diameter (125mm)
• 1 x Memory Metal (125mm)

Smart Spring:

At room temperature this spring is soft enough to pull out to approximately 50mm by applying a small force.

When heated to 70 °C by passing an electric current through it (or by other means such as hot water or a heat gun etc) the spring contracts to its original length with a useful pulling force (equivalent to lifting a 0.5kg weight).

• Spring weight: 1.1g
• Dimensions: 20mm (when closed) 5.5mm external diameter. 4mm internal diameter

Two Way Memory Spring:

These remarkable springs based on a brass alloy ‚¬Ëœremember ‚¬ „¢ to open up when heated and close again when cool.

If immersed in hot water at or around 90 °C they will open in a split second and close as quickly if dropped in cold water. Such springs have many industrial applications e.g. in sprinkler and fire damping systems where they replace expensive single-use only fusible links.

• Spring weight: 3g
• The spring is 10mm long extending to 25mm in hot water.
• 11.5mm external diameter
• 9mm internal diameter

Smart Wire:

Smart wire is a shape memory alloy (SMA) that changes its length with a useful pulling force when a small current is passed through it. The Smart Wire is activated by passing a small electric current through it. It is also affected by temperature.

• 125mm length
• 0.15mm diameter wire