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Special Metals UDIMET® alloy D-979 Fe-Ni Alloy

Category Metal , Nonferrous Metal , Nickel Alloy
Manufacturer Special Metals (includes the former Inco Alloys International Inc.)
Trade Name UDIMET®
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Special Metals UDIMET® alloy D-979 Fe-Ni Alloy.pdf
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Material Notes:
UDIMET® alloy D-979 (UNS N09979) is an iron-nickel alloy designed for turbine disc applications at temperatures up to 1200-1400°F (649-760°C). Hardened by a complex precipitation of intermetallic phases, the alloy combines corrosion resistance with excellent tensile and stress rupture strength.Information Provided by Special Metals Corporation
Physical Properties Metric English Comments
Density 8.19 g/cc
0.296 lb/in³
Mechanical Properties Metric English Comments
Rupture Strength 69.0 MPa

@Temperature 871 °C,
Time 3.60e+6 sec
10000 psi

@Temperature 1600 °F,
Time 1000 hour
145 MPa

@Temperature 816 °C,
Time 3.60e+6 sec
21000 psi

@Temperature 1500 °F,
Time 1000 hour
250 MPa

@Temperature 760 °C,
Time 3.60e+6 sec
36300 psi

@Temperature 1400 °F,
Time 1000 hour
380 MPa

@Temperature 704 °C,
Time 3.60e+6 sec
55100 psi

@Temperature 1300 °F,
Time 1000 hour
515 MPa

@Temperature 649 °C,
Time 3.60e+6 sec
74700 psi

@Temperature 1200 °F,
Time 1000 hour
Thermal Properties Metric English Comments
CTE, linear 13.7 µm/m-°C

@Temperature 93.0 °C
7.61 µin/in-°F

@Temperature 199 °F
Thermal Conductivity 12.6 W/m-K
87.4 BTU-in/hr-ft²-°F
Melting Point 1220 - 1390 °C
2230 - 2530 °F
Solidus 1220 °C
2230 °F
Liquidus 1390 °C
2530 °F
Component Elements Properties Metric English Comments
Aluminum, Al 0.75 - 1.3 %
0.75 - 1.3 %
Boron, B 0.0080 - 0.016 %
0.0080 - 0.016 %
Carbon, C <= 0.080 %
<= 0.080 %
Chromium, Cr 14 - 16 %
14 - 16 %
Iron, Fe 20.804 - 34.542 %
20.804 - 34.542 %
Balance
Manganese, Mn <= 0.75 %
<= 0.75 %
Molybdenum, Mo 3.0 - 4.5 %
3.0 - 4.5 %
Nickel, Ni 42 - 48 %
42 - 48 %
Silicon, Si <= 0.75 %
<= 0.75 %
Titanium, Ti 2.7 - 3.3 %
2.7 - 3.3 %
Tungsten, W 3.0 - 4.5 %
3.0 - 4.5 %
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