Convert Microinches per inch per degree Fahrenheit to Per millikelvin
Convert Microinches per inch per degree Fahrenheit (μin/(in·°F)) to Per millikelvin (1/mK) instantly and accurately.
Conversion Formula
1/mK = μin/(in·°F) × 1.800000000e-9
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 millikelvin
The per millikelvin (1/mK) equals exactly 10³ /K and is encountered in cryogenic physics where working temperatures lie in the millikelvin range. Near quantum phase transitions and magnetic ordering temperatures, anomalous CTE values can reach orders far above room-temperature CTE. 1 /mK = 10³ /K = 10⁹ ppm/K.
Quick Reference Table
| Microinches per inch per degree Fahrenheit (μin/(in·°F)) | Per millikelvin (1/mK) |
|---|---|
| 1 μin/(in·°F) | 1.8 × 10-9 1/mK |
| 2 μin/(in·°F) | 3.6 × 10-9 1/mK |
| 5 μin/(in·°F) | 9 × 10-9 1/mK |
| 10 μin/(in·°F) | 1.8 × 10-8 1/mK |
| 25 μin/(in·°F) | 4.5 × 10-8 1/mK |
| 50 μin/(in·°F) | 9 × 10-8 1/mK |
| 100 μin/(in·°F) | 1.8 × 10-7 1/mK |