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ATI Allegheny Ludlum Altemp® 718 Nickel-Base Superalloy, Solution Treated Plate, UNS N07718

Category Metal , Nonferrous Metal , Nickel Alloy , Superalloy
Manufacturer ATI Allegheny Ludlum
Trade Name
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF ATI Allegheny Ludlum Altemp® 718 Nickel-Base Superalloy, Solution Treated Plate, UNS N07718.pdf
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Material Notes:
Allegheny Ludlum Altemp 718 alloy is an austenitic nickel-base superalloy which is used in applications requiring high strength to approximately 760 degrees Celsius and oxidation resistance to approximately 982 degrees Celsius. In addition, the alloy exhibits excellent tensile and impact strength even at cryogenic temperatures. High strength at room and elevated temperatures is developed by a precipitation heat treatment at 718 degrees Celsius with cooling and a hold at 621°C.The relatively slow response to precipitation hardening permits repair welding of the Altemp 718 alloy even in the aged condition. The Altemp 718 alloy is usually produced by a double melt practice using consumable electrode remelt procedures to provide homogeneity and extremely clean structures. Uses include aircraft ducting and engine plumbing.Tensile properties below are from AMS 5596 and/or AMS 5597.Information provided by Allegheny Ludlum
Physical Properties Metric English Comments
Density 8.19 g/cc
0.296 lb/in³
Mechanical Properties Metric English Comments
Tensile Strength, Ultimate <= 1035 MPa
<= 150100 psi
Tensile Strength, Yield <= 725 MPa

@Strain 0.200 %
<= 105000 psi

@Strain 0.200 %
Elongation at Break >= 30 %
>= 30 %
in 2"
Modulus of Elasticity 200 GPa
29000 ksi
Poissons Ratio 0.294
0.294
Shear Modulus 77.0 GPa
11200 ksi
Thermal Properties Metric English Comments
CTE, linear 12.8 µm/m-°C

@Temperature 20.0 - 93.0 °C
7.11 µin/in-°F

@Temperature 68.0 - 199 °F
13.9 µm/m-°C

@Temperature 20.0 - 315 °C
7.72 µin/in-°F

@Temperature 68.0 - 599 °F
14.4 µm/m-°C

@Temperature 20.0 - 538 °C
8.00 µin/in-°F

@Temperature 68.0 - 1000 °F
Thermal Conductivity 11.2 W/m-K

@Temperature 0.000 - 100 °C
77.7 BTU-in/hr-ft²-°F

@Temperature 32.0 - 212 °F
Maximum Service Temperature, Air 982 °C
1800 °F
oxidation resistance to this temp
Component Elements Properties Metric English Comments
Aluminum, Al 0.50 %
0.50 %
Boron, B 0.0030 %
0.0030 %
Carbon, C 0.050 %
0.050 %
Chromium, Cr 18.5 %
18.5 %
Cobalt, Co 0.30 %
0.30 %
Copper, Cu 0.050 %
0.050 %
Iron, Fe 18 %
18 %
as balance
Manganese, Mn 0.10 %
0.10 %
Molybdenum, Mo 3.0 %
3.0 %
Nickel, Ni 53 %
53 %
Niobium, Nb (Columbium, Cb) 5.1 %
5.1 %
Phosphorous, P 0.0060 %
0.0060 %
Silicon, Si 0.15 %
0.15 %
Sulfur, S 0.0010 %
0.0010 %
Titanium, Ti 1.0 %
1.0 %
Electrical Properties Metric English Comments
Electrical Resistivity 0.000127 ohm-cm
0.000127 ohm-cm
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