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Inconel 625

Designated as UNS N06625 or W.Nr. 2.4856, Inconel 625, also known as Alloy 625, is a nickel-chromium-molybdenum alloy with an addition of niobium that act with the molybdenum to stiffen the alloy’s matrix and thereby provide high strength without a strengthening heat treatment. The alloy resists a wide range of severely corrosive environments and is especially resistant to pitting and crevice corrosion and it has excellent fatigue strength and stress-corrosion cracking resistance to chloride ions. Inconel 625 can be used in chemical processing, aerospace and marine piping, pollution control equipment, and nuclear reactors. Usually it can be used at the temperature up to 980°C[1800°F] in oxidation service.

Inconel 625 seamless pipe, UNS N06625

Inconel 625 seamless pipe, ASTM B444 UNS N06625, 19mmx3.5mmx5620mm.

1. Chemical Composition Requirements

Inconel 625 flange and pipe fittings

Weld neck flanges(RTJ & RF) and pipe fittings; Material: Inconel 625.

ElementContent, %
Nickel≥58.0
Chromium20.0-23.0
Iron≤5.0
Molybdenum8.0-10.0
Niobium(plus Tantalum)3.15-4.15
Carbon≤0.10
Manganese≤0.50
Silicon≤0.50
Phosphorus≤0.015
Sulfur≤0.015
Aluminum≤0.40
Titanium≤0.40
Cobalt≤1.0

2. Physical Properties

DensityMelting RangeSpecific HeatPermeability at 200 OerstedCurie Temperature
lb/cu ingram/cc°F°CBtu/lb°F (J/kg°C)
70°F(21°C)
15.9 kA/m°F°C
0.3058.442350-24601290-13500.098(410)1.0006<-320-196

3. Product Forms and Related Standards of Inconel 625

Inconel 625 serpentine coil

Inconel alloy 625 serpentine coils for heat-exchanging equipment.

Products FormStandard
Rod and barASTM B446
Plate, sheet and stripASTM B443, B906
Seamless pipe and tubeASTM B444, B829
Welded pipeASTM B705, B775
Welded tubeASTM B704. B751
FittingASTM B366
Billet and bar for reforgingASTM B472
ForgingASTM B564

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    (Shijiazhuang Metalsin Pipeline Tech Co., Ltd)
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