INCOLOY 909-SHANGHAI KANGSHENG AVIATION MATERIALS TECHNOLOGY CO., LTD.

INCOLOY 909

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Product Description

A nickel-iron-cobalt alloy with a silicon addition containing niobium and titanium for precipitation hardening. It is similar to INCOLOY alloys 903 and 907 because it has low thermal expansion and high strength. However, the silicon addition results in improved notch-rupture and tensile properties achieved with less-restrictive processing and significantly shorter heat treatments. Used for gas-turbine casings, shrouds, vanes and shafts.

STANDARD PRODUCT FORMS

Round bar, forging stock and hot-rolled profile.

MAJOR SPECIFICATIONS

UNS N19909
SAE AMS 5884, 5892, 5893

LIMITING CHEMICAL COMPOSITION, %

Ni.......35.0 – 40.0
Fe.......Remainder
Co......12.0 – 16.0
Nb..........4.3 – 5.2
Ti............1.3 – 1.8
Si.......0.25 – 0.50
Al..........0.15 max.
C...........0.06 max.

PHYSICAL CONSTANTS AND THERMAL PROPERTIES

Density, Ib/in³.........................................................................0.296
g/cm³......................................................................... 8.19
Melting Range, °F...................................................2540 – 2610
°C...................................................1395 – 1430
Specific Heat, Btu/lb•°F.....................................................0.102
J/kg•°C............................................................ 427
Curie Temperature, °F................................................750 – 850
°C................................................400 – 455
Coefficient of Expansion, 77 – 800°F, 10^-6 in/in •°F........4.3
25 – 427°C, μm/m •°C............. 7.7
Thermal Conductivity, Btu • in/ft²•h•°F............................ 103
W/m •°C........................................... 14.8
Electrical Resistivity, ohm •circ mil/ft................................ 438
μΩ•m...............................................0.728

TYPICAL MECHANICAL PROPERTIES