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ALLOY 825 / UNS N08825 / 2.4858
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Brand Name
Incoloy® 825, Nicrofer 4221
Trade NameAlloy 825
DescriptionAlloy 825 / 2.4858 is a titanium-stabilized nickel-iron-chromium alloy with copper and molybdenum.
Special PropertiesGood resistance to stress-corrosion cracking. Good resistance to oxidizing and non-oxidizing hot acids.
ApplicationPhosphor and sulphur acids plants, oil and gas production.
Suitable welding filler materials2,4621
Standards
Material No :2,4858
EN Degisnation :NiCr21Mo
UNS :N08825
Alloy :825
Chemical Composition
C
%≤ 0.025 Si
≤ %0.50 Mn
≤ %1.00 P
≤ %0.02 S
≤ %0.015 Cr
%19.5 - 23.5 Mo
%2.50-3.50 Ni
%38.0 - 46.0 Ti
%0.60 - 1.20 Cu
%1.50 - 3.00 Al
%≤ 0.20 Co
%≤ 1.00 Fe
%Rest
%≤ 0.025 Si
≤ %0.50 Mn
≤ %1.00 P
≤ %0.02 S
≤ %0.015 Cr
%19.5 - 23.5 Mo
%2.50-3.50 Ni
%38.0 - 46.0 Ti
%0.60 - 1.20 Cu
%1.50 - 3.00 Al
%≤ 0.20 Co
%≤ 1.00 Fe
%Rest
Mechanical Properties 20°C
0.2% Yield Strength Rp
≥ N/mm²240 Tensile Strength
RmN/mm²≥ 550 Elongation A5
≥ %30 Modulus of Elasticity
kN/mm²195
≥ N/mm²240 Tensile Strength
RmN/mm²≥ 550 Elongation A5
≥ %30 Modulus of Elasticity
kN/mm²195
Physical Properties 20°C
Density
g/cm³8.1 Specific Heat Capacity
J/kg K440 Thermal Conductivity
W/m K10.8 Electrical Resistivity
Ω mm²/m1.12
g/cm³8.1 Specific Heat Capacity
J/kg K440 Thermal Conductivity
W/m K10.8 Electrical Resistivity
Ω mm²/m1.12
