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Special Metals INCOLOY® Alloy 945 Nickel-Iron-Chromium Alloy, Annealed and Aged Rod (UNS N09945)
Categories: Metal; Nonferrous Metal; Nickel Alloy
Material Notes: INCOLOY® alloy 945 (UNS N09945) is a high-strength, corrosion-resistant alloy designed for demanding applications in the oil and gas industry. The properties of this age hardenable nickel-iron-chromium alloy are enhanced by its contents of molybdenum, copper, niobium, titanium, and aluminum. The nickel content results in resistance to chloride-induced stress corrosion cracking. Nickel, in conjunction with the molybdenum and copper, gives alloy 945 outstanding resistance to general corrosion in reducing media. Molybdenum imparts resistance to localized attack (pitting and crevice corrosion). The chromium provides resistance in oxidizing environments. Niobium, titanium and aluminum participate in the age hardening reaction that occurs during heat treatment. Their interaction forms gamma prime and gamma double prime precipitates, which strengthen the alloy.

INCOLOY 945 is suitable for downhole oil and gas applications requiring high strength and corrosion resistance in aggressive sour wells containing high levels of hydrogen sulfide and chlorides. Because of the resistance to stress cracking in environments rich in hydrogen sulfide, it is suitable for downhole and surface gas-well components including tubular products, valves, hangers, landing nipples, tool joints and packers. The alloy can also be used for fasteners, pump shafting and high strength piping systems.

Data provided by the manufacturer, Special Metals.
Key Words: NACE MR0175 / ISO 15156-3
Vendors: No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
 
Physical PropertiesOriginal ValueComments
Density 8.20 g/cc
 
Mechanical PropertiesOriginal ValueComments
Hardness, Rockwell C 39
@Diameter 356 mm
 40
@Diameter 25.0 mm
 40
@Diameter 51.0 mm
 40
@Diameter 305 mm
 42
@Diameter 114 mm
 42
@Diameter 152 mm
 43
@Diameter 89.0 mm
Tensile Strength 1163 MPa
@Diameter 114 mm
 1167 MPa
@Diameter 356 mm
 1174 MPa
@Diameter 51.0 mm
 1184 MPa
@Diameter 305 mm
 1186 MPa
@Diameter 89.0 mm
 1194 MPa
@Diameter 25.0 mm
 1214 MPa
@Diameter 152 mm
Tensile Strength, Yield 896 MPa
@Temperature 232 °C
 914 MPa
@Thickness 51.0 mm
 920 MPa
@Thickness 25.0 mm
 925 MPa
@Thickness 114 mm
 934 MPa
@Thickness 89.0 mm
 967 MPa
@Thickness 356 mm
 972 MPa
@Thickness 152 mm
 981 MPa
@Thickness 305 mm
Elongation at Break 22 %
@Diameter 152 mm
 25.5 %
@Diameter 89.0 mm
 26.3 %
@Diameter 305 mm
 26.6 %
@Diameter 356 mm
 27.8 %
@Diameter 25.0 mm
 28.2 %
@Diameter 51.0 mm
 28.6 %
@Diameter 114 mm
Reduction of Area 30.7 %
@Diameter 356 mm
 34.6 %
@Diameter 152 mm
 40.5 %
@Diameter 89.0 mm
 43.6 %
@Diameter 305 mm
 46.7 %
@Diameter 114 mm
 47.6 %
@Diameter 51.0 mm
 48 %
@Diameter 25.0 mm
Modulus of Elasticity 155 GPa
@Temperature 704 °C
 159 GPa
@Temperature 649 °C
 163 GPa
@Temperature 593 °C
 167 GPa
@Temperature 538 °C
 169 GPa
@Temperature 482 °C
 173 GPa
@Temperature 427 °C
 176 GPa
@Temperature 371 °C
 179 GPa
@Temperature 316 °C
 182 GPa
@Temperature 260 °C
 185 GPa
@Temperature 204 °C
 188 GPa
@Temperature 149 °C
 192 GPa
@Temperature 93.0 °C
 195 GPa
@Temperature 23.0 °C
Poissons Ratio 0.31
@Temperature 23.0 °C
 0.31
@Temperature 93.0 °C
 0.31
@Temperature 149 °C
 0.31
@Temperature 204 °C
 0.32
@Temperature 260 °C
 0.32
@Temperature 316 °C
 0.32
@Temperature 371 °C
 0.32
@Temperature 427 °C
 0.32
@Temperature 482 °C
 0.33
@Temperature 538 °C
 0.33
@Temperature 593 °C
 0.34
@Temperature 649 °C
 0.34
@Temperature 704 °C
Fatigue Strength 60000 psi
@Frequency 100 Hz,
# of Cycles 1.00e+7 		Kt = 1; R = -1; sample geometry and heat treatment not reported
 75000 psi
@Frequency 100 Hz,
# of Cycles 1.00e+6 		Kt = 1; R = -1; sample geometry and heat treatment not reported
 80000 psi
@Frequency 100 Hz,
# of Cycles 300000 		Kt = 1; R = -1; sample geometry and heat treatment not reported
Shear Modulus 58.0 GPa
@Temperature 704 °C
 59.0 GPa
@Temperature 649 °C
 61.0 GPa
@Temperature 593 °C
 63.0 GPa
@Temperature 538 °C
 64.0 GPa
@Temperature 482 °C
 65.0 GPa
@Temperature 427 °C
 67.0 GPa
@Temperature 371 °C
 68.0 GPa
@Temperature 316 °C
 69.0 GPa
@Temperature 260 °C
 70.0 GPa
@Temperature 149 °C
 70.0 GPa
@Temperature 204 °C
 74.0 GPa
@Temperature 23.0 °C
 74.0 GPa
@Temperature 93.0 °C
Impact Test 75.0 J
@Diameter 152 mm,
Temperature -59.4 °C		transverse orientation
 79.0 J
@Diameter 89.0 mm,
Temperature -59.4 °C		transverse orientation
 83.0 J
@Diameter 305 mm,
Temperature -59.4 °C		transverse orientation
 84.0 J
@Diameter 114 mm,
Temperature -59.4 °C		transverse orientation
 95.0 J
@Diameter 51.0 mm,
Temperature -59.4 °C
 103 J
@Diameter 25.0 mm,
Temperature -59.4 °C
 105 J
@Diameter 356 mm,
Temperature -59.4 °C		transverse orientation
 
Electrical PropertiesOriginal ValueComments
Electrical Resistivity 663 ohm-cir-mil/ft
Magnetic Permeability 1.003200 Oe
 
Thermal PropertiesOriginal ValueComments
CTE, linear 14.19 µm/m-°C
@Temperature 25.0 - 93.0 °C
 14.24 µm/m-°C
@Temperature 25.0 - 149 °C
 14.36 µm/m-°C
@Temperature 25.0 - 204 °C
 14.47 µm/m-°C
@Temperature 25.0 - 260 °C
 14.69 µm/m-°C
@Temperature 25.0 - 316 °C
 14.94 µm/m-°C
@Temperature 25.0 - 371 °C
 15.12 µm/m-°C
@Temperature 25.0 - 427 °C
 15.26 µm/m-°C
@Temperature 25.0 - 482 °C
 15.39 µm/m-°C
@Temperature 25.0 - 538 °C
 15.64 µm/m-°C
@Temperature 25.0 - 593 °C
 15.93 µm/m-°C
@Temperature 25.0 - 649 °C
 16.32 µm/m-°C
@Temperature 25.0 - 704 °C
 16.89 µm/m-°C
@Temperature 25.0 - 760 °C
 17.47 µm/m-°C
@Temperature 25.0 - 916 °C
 18.01 µm/m-°C
@Temperature 25.0 - 871 °C
Specific Heat Capacity 0.445 J/g-°C
@Temperature 23.0 °C
 0.455 J/g-°C
@Temperature 50.0 °C
 0.467 J/g-°C
@Temperature 100 °C
 0.491 J/g-°C
@Temperature 200 °C
 0.515 J/g-°C
@Temperature 300 °C
 0.540 J/g-°C
@Temperature 400 °C
 0.563 J/g-°C
@Temperature 500 °C
 0.588 J/g-°C
@Temperature 600 °C
 0.607 J/g-°C
@Temperature 700 °C
 0.639 J/g-°C
@Temperature 800 °C
 0.670 J/g-°C
@Temperature 900 °C
 0.688 J/g-°C
@Temperature 1000 °C
 0.690 J/g-°C
@Temperature 1100 °C
 0.700 J/g-°C
@Temperature 1150 °C
Thermal Conductivity 10.9 W/m-K
@Temperature 23.0 °C
 11.5 W/m-K
@Temperature 50.0 °C
 12.5 W/m-K
@Temperature 100 °C
 14.4 W/m-K
@Temperature 200 °C
 16.4 W/m-K
@Temperature 300 °C
 18.4 W/m-K
@Temperature 400 °C
 20.3 W/m-K
@Temperature 500 °C
 22.4 W/m-K
@Temperature 600 °C
 23.9 W/m-K
@Temperature 700 °C
 25.7 W/m-K
@Temperature 800 °C
 26.2 W/m-K
@Temperature 900 °C
 28.0 W/m-K
@Temperature 1000 °C
 29.5 W/m-K
@Temperature 1100 °C
Melting Point 1270 - 1377 °C
Solidus 1270 °C
Liquidus 1377 °C
 
Processing PropertiesOriginal ValueComments
Annealing Temperature 954 - 1066 °C
Hot-Working Temperature 930 - 1150 °C
 
Component Elements PropertiesOriginal ValueComments
Aluminum, Al 0.010 - 0.70 %
Carbon, C 0.0050 - 0.040 %
Chromium, Cr 19.5 - 23 %
Copper, Cu 1.5 - 3.0 %
Iron, Fe 5.7 - 28 %as balance
Manganese, Mn <= 1.0 %
Molybdenum, Mo 3.0 - 4.0 %
Nickel, Ni 45 - 55 %
Niobium, Nb (Columbium, Cb) 2.5 - 4.5 %
Phosphorus, P <= 0.030 %
Silicon, Si <= 0.50 %
Sulfur, S <= 0.030 %
Titanium, Ti 0.50 - 2.5 %

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to go back to viewing the property data in MatWeb's normal format.

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