Special Metals INCONEL® Alloy 625

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Special Metals INCONEL® Alloy 625
Categories:	Metal; Nonferrous Metal; Nickel Alloy; Superalloy
Material Notes:	A nickel-chromium-molybdenum alloy with an addition of niobium that acts 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. Used in chemical processing, aerospace and marine engineering, pollution-control equipment, and nuclear reactors. Standard product forms are round, flats, forging stock, extruded section, pipe, tube, plate, sheet, strip, and wire. Data provided by the manufacturer, Special Metals.
Key Words:	ASME SB-443, SB-444, SB-446, SB-564, Boiler Code Sections I, III, VIII, IX; AFNOR NC 22 D Nb; VdTUV 499, AMS 5581, AMS 5599, AMS 5666, AMS 5837; DIN 17744, 17750-17752, 17754; Werkstoff Nr. 2.4856; NACE MR-01-75, UNS N06625; BS 3072, 3074, 3076 (NA21); ASTM B443, ASTM B444, ASTM B446, ASTM B564, ASTM B704, ASTM B705, ASTM B751
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Physical Properties	Original Value	Comments

Density	8.44 g/cc

Mechanical Properties	Original Value	Comments
Tensile Strength, Ultimate	880 MPa	Annealed
	760 MPa @Temperature 650 °C	Annealed prior to test
Tensile Strength, Yield	460 MPa	Annealed
	290 MPa @Temperature 650 °C	Annealed prior to test
Elongation at Break	50 %	Annealed prior to test.
	55 % @Temperature 650 °C	Annealed prior to test.
Rupture Strength	2500 psi @Temperature 982 °C, Time 3.60e+6 sec
	4500 psi @Temperature 982 °C, Time 360000 sec
	13000 psi @Temperature 816 °C, Time 3.60e+6 sec
	18000 psi @Temperature 816 °C, Time 360000 sec
	53000 psi @Temperature 649 °C, Time 3.60e+6 sec
	64000 psi @Temperature 649 °C, Time 360000 sec

Electrical Properties	Original Value	Comments
Electrical Resistivity	0.000129 ohm-cm
Magnetic Permeability	1.0006	at 200 Oersted (15.9 kA/m)
Curie Temperature	<= -196 °C

Thermal Properties	Original Value	Comments
CTE, linear	12.8 µm/m-°C @Temperature 20.0 - 100 °C
Specific Heat Capacity	0.410 J/g-°C
Thermal Conductivity	9.80 W/m-K
Melting Point	1290 - 1350 °C
Solidus	1290 °C
Liquidus	1350 °C

Component Elements Properties	Original Value	Comments
Aluminum, Al	<= 0.40 %
Carbon, C	<= 0.10 %
Chromium, Cr	20 - 23 %
Cobalt, Co	<= 1.0 %
Iron, Fe	<= 5.0 %
Manganese, Mn	<= 0.50 %
Molybdenum, Mo	8.0 - 10 %
Nickel, Ni	>= 58 %
Niobium, Nb (Columbium, Cb)	3.15 - 4.15 %	Includes Ta
Phosphorus, P	<= 0.015 %
Silicon, Si	<= 0.50 %
Sulfur, S	<= 0.015 %
Titanium, Ti	<= 0.40 %

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NINC33 / 17402

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