Weight Reduction The most widely recognised reason to use titanium over steel in a spring application is to lower the overall weight of the end product. Titanium springs can routinely weigh anywhere from 40-60% less than a steel spring used in the same application.
Free Length / Pitch Angle While most of the weight reduction from using titanium is built into the weight properties of the material itself, the lower torsion modulus of titanium also makes it possible to achieve the same load capacity in a shorter spring design by allowing for a steeper pitch angle on each coil.
Corrosion Resistance The basic metallurgical properties of titanium allow for a greatly improved resistance to corrosion, thus eliminating the need for costly plating and painting operations that are typically added to alloy steel spring designs.
Processing While titanium springs are different from traditional steel springs in many ways, it is possible to employ similar post production shot-peening and heat treatment processes to provide greater strength and increase the fatigue life of a titanium spring design.
Side-by-Side Comparison with an Alloy Steel Spring
The Atlantic Spring location engineers large bar diameter springs for aerospace applications, such as the ram air turbine. For the purposes of this example, we compared an alloy steel spring and titanium spring design for the same application diameter and rate requirements.
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