ALLOY 825

NICKEL & SUPER ALLOYS

UNS N08825 : ASTM B425 & B564 (VO2.04)

GENERAL SCOPE

Alloy 825 is a Ni-Cr-Fe-Mo-Cu alloy with excellent resistance to stress corrosion cracking, and good pitting resistance in all environments except strongly oxidizing chloride solutions. The alloy is ductile and easily worked and fabricated, but work hardens in a similar manner to austenitic stainless steels.

The alloy cannot be hardened by heat-treatment, but enhanced mechanical properties can be obtained by cold working, especially in sour well tubing strings, and for heat-exchangers, and in chemical processing plants.

CHEMICAL COMPOSITION

CSiMnPSCrNiMoCuTiAlFe
Min.....19.5038.002.501.500.60.22.00
Max0.050.501.00.0.03023.5046.003.503.001.200.200.00

MECHANICAL PROPERTIES

Condition: Annealed
U.T.S85 KSI Min(586 N/mm2)
0.2% Proof Stress35 KSI Min(241 N/mm2)
Elongation30 %