UDIMET D-979-SHANGHAI KANGSHENG AVIATION MATERIALS TECHNOLOGY CO., LTD.

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UDIMET D-979

UDIMET ALLOY D-979

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Product Description

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.

STANDARD PRODUCT FORMS

Forging billet and bar.

MAJOR SPECIFICATIONS

UNS N09979, AMS 5746

LIMITING CHEMICAL COMPOSITION, %

Limiting
Cr......14.0 – 16.0
Fe ...........Balance
Mo .........3.0 – 4.5
W ...........3.0 – 4.5
Ti ...........2.7 – 3.3
Al ........0.75 – 1.3
Ni ......42.0 – 48.0
C ..........0.08 max.
Si .........0.75 max.
Mn .......0.75 max.
B ...0.008 – 0.016

PHYSICAL CONSTANTS AND THERMAL PROPERTIES

Density, Ib/in³........................................................................0.296
g/cm³ .........................................................................8.19
Melting Range, °F ...................................................2225 – 2530
°C ...................................................1220 – 1390
Coefficient of Expansion, 70 – 200°F, 10^-6 in/in • °F......7.60
21 – 93°C, µm/m • °C ............13.7
Thermal Conductivity, Btu • in/ft 2 • h • °F ..............................87
W/m • °C ..........................................12.6

TYPICAL MECHANICAL PROPERTIES