Convert Microinches per inch per degree Fahrenheit to ppb per degree Fahrenheit
Convert Microinches per inch per degree Fahrenheit (μin/(in·°F)) to ppb per degree Fahrenheit (ppb/°F) instantly and accurately.
Conversion Formula
ppb/°F = μin/(in·°F) × 1000
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 ppb per degree Fahrenheit
The ppb/°F equals 9/5 × 10⁻⁹ /K ≈1.8 × 10⁻⁹ /K, the Fahrenheit counterpart of ppb/K. Used when ultra-low-expansion glass ceramics are characterised in US laboratories using Fahrenheit protocols. Zerodur at ±0.02 ppb/K ≈ ±0.011 ppb/°F. 1 ppb/°F = 9/5 × 10⁻⁹ /K ≈1.8 ppb/K.
Quick Reference Table
| Microinches per inch per degree Fahrenheit (μin/(in·°F)) | ppb per degree Fahrenheit (ppb/°F) |
|---|---|
| 1 μin/(in·°F) | 1000 ppb/°F |
| 2 μin/(in·°F) | 2000 ppb/°F |
| 5 μin/(in·°F) | 5000 ppb/°F |
| 10 μin/(in·°F) | 10000 ppb/°F |
| 25 μin/(in·°F) | 25000 ppb/°F |
| 50 μin/(in·°F) | 50000 ppb/°F |
| 100 μin/(in·°F) | 100000 ppb/°F |