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Incoloy 925

Designated as UNS N08925, Incoloy 925 (also known as “Alloy 925”) is a precipitation-hardenable iron-nickel-chromium alloy with additions of molybdenum, copper, titanium and aluminum. 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. Incoloy 925 is used in various applications requiring a combination of high strength and corrosion resistance such as sour gas wells, oil production equipment, surface & down-hole piping components(flanges, valves, fasteners, fittings, shafts), etc.

ASTM B983 UNS N09925 Incoloy 925 seamless pipes

ASTM B983 UNS N08925 heavy-wall seamless pipe, 16″ w.t=45mm, Incoloy 925.

1. Chemical Composition Requirement

The Chemical Composition of Incoloy 925, %
Nickel42.0-46.0
Chromium19.5-22.5
Iron≥22.0
Molybdenum2.5-3.5
Copper1.5-3.0
Titanium1.9-2.4
Alumium0.1-0.5
Manganese≤1.00
Silicon≤0.50
Niobium≤0.50
Carbon≤0.03
Sulfur≤0.30

2. Mechanical Properties of Incoloy 925

Tensile Strength, min.Yield Strength, min. Elongation, min.Hardness, min.
MpaksiMpaksi%HRC
12101768151182436.5

3. Physical Properties of Incoloy 925

DensityMelting RangeSpecific HeatElectrical Resistivity
g/cm3°F°CJ/kg.kBtu/lb. °FµΩ·m
8.082392-24901311-13664350.1041166

4. Product Forms and Standards

Product FormStandard
Rod, bar & WireASTM B805
Plate, sheet & stripASTM B872
Seamless pipe and tubeASTM B983
ForgingASTM B637

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