TC is the thermal conductivity with an unit of Btu/hr-ft-°F, and TD is the thermal diffusivity with and unit of ft²/hr. The nominal coefficients of TC and TD for nickel alloy 625 (UNS N06625) at elevated temperatures are listed in below two tables. Note that ±10% uncertainty may exist due to compositional variations and analytic data deviation.

 Coefficients of TC & TD for Alloy 625 @ (70°F~750°F)

Temp.	TC	TD
70	5.7	0.110
100	5.8	0.113
150	6.0	0.116
200	6.3	0.119
250	6.5	0.121
300	6.7	0.124
350	7.0	0.126
400	7.2	0.128
450	7.5	0.130
500	7.7	0.132
550	7.9	0.134
600	8.2	0.136
650	8.4	0.138
700	8.7	0.140
750	8.9	0.142

*Temp.: indicated temperature, °F.

 Coefficients of TC & TD for Alloy 625 @ (800°F~1550°F)

Temp.	TC	TD
800	9.1	0.144
850	9.4	0.146
900	9.6	0.148
950	9.8	0.150
1000	10.1	0.152
1050	10.3	0.154
1100	10.5	0.156
1150	10.8	0.158
1200	11.0	0.159
1250	11.3	0.161
1300	11.5	0.163
1350	11.8	0.165
1400	12.0	0.167
1450	12.3	0.169
1500	12.6	0.172
1550	-	0.175

*Temp.: indicated temperature, °F.