Nickel Alloy: 2550

CRA 2550 (UNS N06255) is a cold-worked nickel-based alloy meeting the severe challenges of wells containing high chlorides, H2S and temperature. With a typical Pitting Resistance Equivalent Number of 52 it is highly resistant to pitting corrosion and chloride-induced stress corrosion cracking. For sour service applications, it is classified in MR0175/ISO15156 as a type 4d alloy, with no restrictions to partial pressure of H2S below 300F and resistant to 300 psi H2S at 425°F.

Corrosion Resistance

Severe

Alloy Group

Nickel Alloy

Yield Stregth

110 - 150

Wall Tolerance

0.875

Density

0.2970

Pren

44.45 - 67.25

Element Composition

El.
Min:
Max:
C
×
0.03%
Cr
23%
26%
Ni
47%
52%
Mo
6%
9%
Cu
×
1.2%
Ti
×
0.69%
W
×
3%
Si
×
1%
Fe
6.02%
24%
Mn
×
1%
P
×
0.03%
S
×
0.03%

Alloy Files

ALLOY-SERIES-2550.pdf
PDF
CRA-2550-Datasheet.pdf
PDF
Alloy Products
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