Alloy 925
Equivalent designations
UNS N09925
Form
ASTM
Rod, bar and wire
B 805
Rod, bar and forging
B 637
Plate, sheet and strip
B 872
Seamless pipe and tube
B 983
Chemical composition
%
Ni
Fe
Cr
C
Mn
Si
P
S
Mo
Cu
Ti
Al
Nb
min
42.0
22.0
19.5
2.5
1.5
1.9
0.10
max
46.0
22.5
0.030
1.00
0.50
0.030
0.030
3.5
3.0
2.4
0.50
0.50
Physical properties
Density
8.08 g/cm3
Melting range
1311-1366℃
Features: Incoloy 925 is a precipitation-hardenable nickel-iron-chromium alloy. It combines high strength with Incoloy 825’s excellent corrosion resistance. Incoloy 925 is particularly resistant to sulfide-induced stress cracking and stress-corrosion cracking.
Applications: Down-hole and surface well components for sour (containing hydrogen sulfide) crude oil and natural gas production.