The yield strength of Hastelloy C-276 (UNS N10276) is temperature dependent: as the temperature elevated, its yield strength also gradually decreases. The ASME BPVC Section II Part D has prescribed a series of yield strengths of Hastelloy C-276 materials at elevated temperatures which are listed in below table.

*Temp.:	-20~100	150	200	250	300	350	400	450	500	550
*Y.S	41.0	38.8	37.3	35.9	34.5	33.2	32.0	30.9	29.8	28.9
*Temp.:	600	650	700	750	800	850	900	950	1000	-
*Y.S	28.0	27.3	26.7	26.1	25.7	25.3	25.1	24.9	24.8	-

*Temp.: metal temperature, °F, not exceeding; *Y.S: yield strength, ksi.
*The tabulated values are applicable to ASTM B366 Gr. N10276 seamless or welded fittings, ASTM B462 & B564 Gr. N10276 forgings, ASTM B574 Gr. N10276 rods, ASTM B575 Gr. N10276 plates, sheets, strips, ASTM B619 Gr. N10276 welded pipes, ASTM B622 Gr. N10276 seamless pipes & tubes, ASTM B626 Gr. N10276 welded tubes.
*All materials shall be solution annealed.