ASTM A182 F51 for ASME B31.3 Process Piping

ASTM A182 Grade F51 is a standard duplex stainless steel with nominal composition of 22Cr–5Ni–3Mo–N. The ASTM A182 F51 forgings may be furnished as flanges, fittings, valve parts or other pressure vessel components. The ASME B31.3 process piping code has endorsed this steel as a listed material. The design minimum temperature for ASTM A182 F51 without impact testing is -60°F [-51°C]. At moderately elevated temperature, this steel may develop embrittlement after servce, thus, the maximum design temperature is generally restricted to 600°F [315°C].

Temp. °F	S, ksi
-60~100	30.0
200	30.0
300	28.9
400	27.8
500	27.2
600	26.9

*Basic allowable stress value, S, in tension for ASTM A182 Gr. F51 at various metal temperatures, for design calculation.
*Allowable stresses in shear shall be 0.80 times the basic allowable stress in tension.
*Allowable stresses in bearing shall be 1.60 times the basic allowable stress in tension.
*Allowable stresses in compression shall be no greater than the basic allowable stress in tension.
*The specified minimum tensile strength of ASTM A182 F51 at room temperature is 90 ksi; while the minimum yield strength of that at room temperature is 65 ksi.