Product Description
An oxidation-resistant low coefficient of thermal expansion (low CTE) superalloy developed for gas turbine applications. The alloy is strengthened by a precipitation-hardening heat treatment made possible by additions of niobium and aluminum. In addition, the aluminum content provides excellent resistance to oxidation at high temperatures. The alloy's density is 5% less than those of superalloys such as INCONEL alloy 718. The combination of low expansion, high strength and excellent resistance to oxidation makes the alloy especially useful for gas turbine and steam turbine components. The low expansion enables closer control of clearances and tolerances for greater power output and fuel efficiency.
STANDARD PRODUCT FORMS
Sheet, round bar, wire and extruded section.
MAJOR SPECIFICATIONS
UNS R30783
SAE AMS 5940
SAE AMS 5940
LIMITING CHEMICAL COMPOSITION, %
Ni.......26.0 – 30.0
Fe...... 24.0 – 27.0
Co.......Remainder
Al............5.0 – 6.0
Nb..........2.5 – 3.5
Cr...........2.5 – 3.5
Ti............0.1 – 0.4
B.... 0.003 – 0.012
C............. 0.3 max.
Cu........0.50 max.
Mn........0.50 max.
P........ 0.015 max.
S........ 0.005 max.
Si..........0.50 max.
Fe...... 24.0 – 27.0
Co.......Remainder
Al............5.0 – 6.0
Nb..........2.5 – 3.5
Cr...........2.5 – 3.5
Ti............0.1 – 0.4
B.... 0.003 – 0.012
C............. 0.3 max.
Cu........0.50 max.
Mn........0.50 max.
P........ 0.015 max.
S........ 0.005 max.
Si..........0.50 max.
PHYSICAL CONSTANTS AND THERMAL PROPERTIES
Density, Ib/in3 (g/cm3)............................................ 0.282 (7.81)
Melting Range, °F (°C)..............2437 – 2565 (1336 – 1407)
Specific Heat, Btu/lb•°F (J/kg•°C).......................0.109 (455)
Coefficient of Expansion, 10-6 in/in•°F (μm/m•°C)
70-200°F (21–93°C)...................5.60 (10.08)
70-500°F (21–260°C)................5.74 (10.94)
70-800°F (21–427°C)................6.08 (10.67)
70-1000°F (21–538°C)..............6.57 (11.83)
70-1200°F (21–650°C).............. 7.15 (12.87)
Thermal ConductivityA, Btu•in/ft2•h•°F (W/m•°C).....70.9 (10.2)
Electrical ResistivityA, ohm•circ mil/ft (μΩ•m)....615 (1.021)
Young’s ModulusA, 106 psi (GPa)............................ 26.8 (185)
Shear’s ModulusA, 106 psi (GPa).................................. 9.7 (67)
Poisson’s RatioA....................................................................... 0.38
HardnessA, HRC.................................................................30 – 38
ARoom temperature, as aged.
Melting Range, °F (°C)..............2437 – 2565 (1336 – 1407)
Specific Heat, Btu/lb•°F (J/kg•°C).......................0.109 (455)
Coefficient of Expansion, 10-6 in/in•°F (μm/m•°C)
70-200°F (21–93°C)...................5.60 (10.08)
70-500°F (21–260°C)................5.74 (10.94)
70-800°F (21–427°C)................6.08 (10.67)
70-1000°F (21–538°C)..............6.57 (11.83)
70-1200°F (21–650°C).............. 7.15 (12.87)
Thermal ConductivityA, Btu•in/ft2•h•°F (W/m•°C).....70.9 (10.2)
Electrical ResistivityA, ohm•circ mil/ft (μΩ•m)....615 (1.021)
Young’s ModulusA, 106 psi (GPa)............................ 26.8 (185)
Shear’s ModulusA, 106 psi (GPa).................................. 9.7 (67)
Poisson’s RatioA....................................................................... 0.38
HardnessA, HRC.................................................................30 – 38
ARoom temperature, as aged.
TYPICAL MECHANICAL PROPERTIES
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SHANGHAI KANGSHENG AVIATION MATERIALS TECHNOLOGY CO., LTD.
Address: No. 5999, Huyi Road, Waigang Town, Jiading District, Shanghai
Tel：13641813331
Technical support：13671903676
Emial：ksalloy@ksalloy.com
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