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254SMO / UNS S31254 /1.4547
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Brand Name
Avesta® 254 SMO
Trade Name254 SMO
Description1.4547 / 254 SMO is an austenitic chromium-nickel-molybdenum stainless steel.
Special PropertiesOutstanding resistance to localized corrosion such as pitting and crevice corrosion, as well as to stress-corrosion. Acceptable seawater-corrosion.
ApplicationChemical industry, offshore, seawater desalination plant.
Suitable welding filler materials1.4547
Standards
Material No :1.4547
EN Degisnation :X1CrNiMoCuN20-18-7
UNS :S31254
Alloy :254 SMO
Chemical Composition
C
%≤ 0.02 Si
≤ %0.70 Mn
≤ %1.00 P
≤ %0.03 S
≤ %0.01 Cr
%19.5 - 20.5 Mo
%6.00 - 7.00 Ni
%17.5 - 18.5 N
%0.18 - 0.25 Cu
%0.50 - 1.00
%≤ 0.02 Si
≤ %0.70 Mn
≤ %1.00 P
≤ %0.03 S
≤ %0.01 Cr
%19.5 - 20.5 Mo
%6.00 - 7.00 Ni
%17.5 - 18.5 N
%0.18 - 0.25 Cu
%0.50 - 1.00
Mechanical Properties 20°C
Hardness HB 30
≤ HB250 0.2% Yield Strength Rp
≥ N/mm²300 Tensile Strength
RmN/mm²650-850 Elongation A5
≥ %35 Modulus of Elasticity
kN/mm²200
≤ HB250 0.2% Yield Strength Rp
≥ N/mm²300 Tensile Strength
RmN/mm²650-850 Elongation A5
≥ %35 Modulus of Elasticity
kN/mm²200
Physical Properties 20°C
Density
g/cm³8 Specific Heat Capacity
J/kg K500 Thermal Conductivity
W/m K13 Electrical Resistivity
Ω mm²/m0.85
g/cm³8 Specific Heat Capacity
J/kg K500 Thermal Conductivity
W/m K13 Electrical Resistivity
Ω mm²/m0.85
