The tensile strengths and yield strengths of ASTM A182/ASME SA-182 F51 forgings at elevated temperatures are provided in ASME Boiler and Pressure Vessel Code Section II Part D. These values, which are tabulated in below two tables, are provided for use in design calculations.

Temp.	Su
-20 to 100	90.0
200	90.0
300	86.8
400	83.5
500	81.6
600	80.7
650	80.5

*Tensile strength, Su, ksi, for metal temperature, °F, not exceeding.

Temp.	Sy
-10 to 100	65.0
150	60.5
200	57.8
250	55.5
300	53.7
350	-
400	51.2
450	-
500	49.6
550	-
600	47.9
650	46.9

*Yield strengths, Sy, ksi, for metal temperature, °F, not exceeding.