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> Low thermal expansion alloys for precision equipment
Because the thermal expansion property of these alloys is as low as that of Si, they are most suitable for precision equipment parts.
These alloys feature very low thermal expansion property, which is about 1/10 that of common metals or alloys.
Precision equipment parts, such as high precision instruments and microwave guides,
whose dimensions practically are not affected by temperature change.
The chart below shows that the elongation percentage of the low thermal expansion alloys is very low as compared with that of iron (Fe), especially, when the temperature is lower than 200°C or 300°C.
Relationship between Temperature and Elongation Percentage
Elongation percentage of low thermal expansion alloys