The ASME Boiler and Pressure Vessel Code Section II Part D provides the nominal coefficients of thermal conductivity for Hastelloy C-276(UNS N10276). The values are listed in below table:

*Temp.	100	150	200	250	300	350	400	450	500	550	600	650
*TC	5.9	6.2	6.4	6.7	7.0	7.2	7.5	7.8	8.1	8.4	8.7	8.9
*Temp.	700	750	800	850	900	950	1000	1050	1100	1150	1200	-
*TC	9.2	9.5	9.8	10.1	10.4	10.7	11.0	11.3	11.5	11.8	12.1	-

*Temp.: °F; *TC: thermal conductivity for Hastelloy C-276, Btu/hr-ft-°F.
*Values of thermal expansion should be used with the understanding that there is an associated ±10% uncertainty.