Hastelloy C-276 bolting materials cover a variety of fasteners such as bolts, nuts, washers, screws, studs, and dowel pins. These bolting materials shall be made of ASTM B574 UNS N10276 rod. Especially, Hastelloy C276 bolts, cap screws, studs and nuts shall be manufactured to ASTM F467 and ASTM F468 under solution-annealed condition.

According to ASME Boil and Pressure Vessel Code Section II Part D, Hastelloy C-276 bolting materials are not permitted by ASME Section III. However, it can be applied for ASME BPVC Section VIII Division 1 with maximum temperature limit of 1250°F, Section VIII Division 2 with maximum temperature limit of 800°F, as well as Section XII with maximum temperature limit of 650°F. Its maximum allowable stresses at elevated temperatures are listed in below table.

*Temp.	-20~100	200	300	400	500	600	650	700	750	800
*MAS	25.0	25.0	23.0	21.2	20.0	18.8	18.3	17.8	17.4	17.1
*Temp.	850	900	950	1000	1050	1100	1150	1200	1250	-
*MAS	16.8	16.6	16.5	16.5	16.5	15.0	12.2	9.8	7.8	-

*Temp.: metal temperature, unit: °F, not exceeding; *MAS: maximum allowable stress, unit: ksi.