Corrosion resistant alloys
Incoloy 925

 

Incoloy 925 is a precipitation-hardenable nickel-iron chromium alloy with additions of molybdenum and copper. It combines the high strength of a precipitation-hardenable alloy with the excellent corrosion resistance of alloy 825. The alloy has outstanding resistance to general corrosion, pitting, crevice corrosion and stress-corrosion cracking in many aqueous environments, including those containing sulfides and chlorides. It is widely used for surface and down-hole hardware in sour gas wells and for oil-production equipment.

 

Equivalent alloy:UNS N09925 (US

 

Physical Properties:

Density

8.08 g/cm3

Melting range

1311-1366

 

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

 

Designation

Standard

Rod, bar and wire

ASTM B 805

Rod, bar and forging

ASTM B 637

Plate, sheet and strip

ASTM B 872

Seamless pipe and tube

ASTM B 983

 

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