Alloy 825 (UNS N08825) is an austenitic nickel-iron-chromium alloy with additions of molybdenum, copper and titanium. It was developed to provide exceptional corrosion resistance in both oxidizing and reducing environments. The alloy is resistant to chloride stress-corrosion cracking and pitting. The addition of titanium stabilizes Alloy 825 against sensitization in the as-welded condition making the alloy resistant to intergranular attack after exposure to temperatures in a range that would sensitize unstabilized stainless steels. The fabrication of Alloy 825 is typical of nickel-base alloys, with material being readily formable and weldable by a variety of techniques
Available tube product forms:
Straight
Coiled
Seamless
Seam welded and cold redrawn
Seam welded, cold redrawn and annealed
Typical Applications:
Condensers
Oil and gas well equipment
Hydraulic systems
Chemical injection lines
Chemical process equipment and vessels
Downhole control lines
Control and instrumentation
Acid Production
Nuclear fuel processing
Typical manufacturing specification:
ASTM B626
ASTM B423
ASTM B704
Also individual customer specifications.
Industries predominantly using this grade:
Chemical processing
Oil and gas
Nuclear and power
Technical Datamechanical Properties:
Temper
Annealed
Tensile Rm
85
ksi (min)
Tensile Rm
590
MPa (min)
R.p. 0.2% Yield
35
ksi (min)
R.p. 0.2% Yield
240
MPa (min)
Elongation (2” or 4D gl)
30
% (min)
Physical Properties Room Temperature:
Specific Heat (0-100°C)
440
J.kg-1.°K-1
Thermal Conductivity
11.1
W.m -1.°K-1
Thermal Expansion
14
mm/m/°C
Modulus Elasticity
196
GPa
Electrical Resistivity
1.13
μohm/cm
Density
8.13
g/cm3
Chemical Composition (% by weight)
Element
Min
Max
C
-
0.05
Si
-
0.5
Mn
-
1
P
-
0.03
S
-
0.03
Al
-
0.2
Cr
19.5
23.5
Cu
1.5
3
Fe
Balance
Mo
2.5
3.5
N
0.15
0.25
Ni
38
46
Ti
0.60
1.20
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Additional Information:
Item Code: 9999999
Production Capacity: 1000 METRIC TONS
Delivery Time: READY STOCK
Packaging Details: Packing: Superior Quality Polythin Bag and Standard Wooden Box