Convert Microinches per inch per degree Fahrenheit to Per kelvin
Convert Microinches per inch per degree Fahrenheit (μin/(in·°F)) to Per kelvin (1/K) instantly and accurately.
Conversion Formula
1/K = μin/(in·°F) × 1.800000000e-6
About Microinches per inch per degree Fahrenheit
The microinch per inch per degree Fahrenheit (μin/(in·°F)) equals exactly 9/5 × 10⁻⁶ /K = 1 ppm/°F. It is the native US CTE unit in ASTM E228 and ASTM E831 standards; most US material datasheets list CTE values in this unit. Steel: ≈6.7 μin/(in·°F); aluminium: ≈12.8 μin/(in·°F); titanium: ≈4.9 μin/(in·°F). 1 μin/(in·°F) = 1 ppm/°F.
About Per kelvin
The per kelvin (1/K = K⁻¹) is the SI unit for linear thermal expansion coefficient (α = (1/L) dL/dT). Used in NIST databases, FEA material cards, and thermodynamics textbooks. Liquid mercury: ≈6.1 × 10⁻⁵ /K; aluminium: ≈2.3 × 10⁻⁵ /K; fused silica: ≈5.5 × 10⁻⁷ /K. 1 /K = 10⁶ ppm/K = 1/°C.
Quick Reference Table
| Microinches per inch per degree Fahrenheit (μin/(in·°F)) | Per kelvin (1/K) |
|---|---|
| 1 μin/(in·°F) | 1.8 × 10-6 1/K |
| 2 μin/(in·°F) | 3.6 × 10-6 1/K |
| 5 μin/(in·°F) | 9 × 10-6 1/K |
| 10 μin/(in·°F) | 1.8 × 10-5 1/K |
| 25 μin/(in·°F) | 4.5 × 10-5 1/K |
| 50 μin/(in·°F) | 9 × 10-5 1/K |
| 100 μin/(in·°F) | 0.00018 1/K |