Thermal Expansion
Dimensional Growth (Linear)
Understanding Growth
Thermal expansion is the tendency of matter to change its shape, area, and volume in response to temperature fluctuations.
Linear Formula
$\Delta L = L \cdot \alpha \cdot \Delta T$
ΔL = Expansion, L = Length, α = CTE, ΔT = Temp Change
Common CTE Reference (per °F)
| Material | CTE ($\times 10^{-6}$) |
|---|---|
| Aluminum | 12.3 |
| Titanium | 4.8 |
| Stainless 304 | 9.6 |
| Tool Steel D2 | 6.6 |
| Invar 36 | 0.72 |
Metrology Standard: Precision parts should be inspected at 68°F (20°C / 293.15K) to ensure standardized measurement accuracy.