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Thermal Expansion Coefficients for Alloy 625 at Elevated Temperatures

The thermal expansion coefficients for Inconel alloy 625 (UNS N06625) includes: Coefficient A – the instantaneous coefficient of thermal expansion x 10-6(inch/inch/°F); Coefficient B – the mean coefficient of thermal expansion x 10-6(inch/inch/°F) in going from 70°F to indicated temperature; Coefficient C – the linear thermal expansion (inch/100 ft) in going from 70°F to indicated temperature. Their values at elevated temperatures are listed in below three tables.

Thermal Expansion Coefficients for Alloy 625 (70°F ~ 500°F)

Temp.Coefficient ACoefficient BCoefficient C
706.76.70
1006.96.80.2
1507.27.00.7
2007.47.11.1
2507.47.21.6
3007.57.22.0
3507.57.32.4
4007.57.32.9
4507.57.33.3
5007.57.43.8
*Temp.: the indicated temperature, °F.

Thermal Expansion Coefficients for Alloy 625 (550°F ~ 1000°F)

Temp.Coefficient ACoefficient BCoefficient C
5507.67.44.2
6007.77.44.7
6507.87.45.2
7008.07.55.6
7508.27.56.1
8008.47.66.6
8508.77.67.1
9008.97.77.7
9509.17.88.2
10009.47.98.8
*Temp.: the indicated temperature, °F.

Thermal Expansion Coefficients for Alloy 625 (1050°F ~ 1500°F)

Temp.Coefficient ACoefficient BCoefficient C
10509.67.99.3
11009.88.09.9
11509.98.110.5
120010.18.211.1
125010.28.311.7
130010.48.412.3
135010.58.413.0
140010.78.513.6
145010.98.614.2
150011.38.714.9
*Temp.: the indicated temperature, °F.

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