Product Description
A nickel-chromium alloy similar to INCONEL alloy X-750 but with increased aluminum content for greater precipitation hardening. This alloy was designed for use as exhaust valves in internal-combustion engines. In that application, the alloy offers high strength at operating temperatures, high hot hardness for wear resistance, and corrosion resistance in hot exhaust gases containing lead oxide, sulfur, bromine and chlorine.
STANDARD PRODUCT FORMS
Round bar.
MAJOR SPECIFICATIONS
UNS N07751
LIMITING CHEMICAL COMPOSITION, %
Limiting
Nia.........70.0 min.
Cr...... 14.0 – 17.0
Fe...........5.0 – 9.0
aPlus Co. bPlus Ta.
Ti.............2.0 – 2.6
Al.............0.9 – 1.5
Nbb..........0.7 – 1.2
C...........0.10 max.
Mn.......... 1.0 max.
Si............ 0.5 max.
S...........0.01 max.
Cu........0.05 max.
Nia.........70.0 min.
Cr...... 14.0 – 17.0
Fe...........5.0 – 9.0
aPlus Co. bPlus Ta.
Ti.............2.0 – 2.6
Al.............0.9 – 1.5
Nbb..........0.7 – 1.2
C...........0.10 max.
Mn.......... 1.0 max.
Si............ 0.5 max.
S...........0.01 max.
Cu........0.05 max.
PHYSICAL CONSTANTS AND THERMAL PROPERTIES
Density, Ib/in3..........................................................................0.299
g/cm3......................................................................... 8.28
Melting Point, °F......................................................2540 – 2600
°C......................................................1390 – 1430
Specific Heat, Btu/lb •°F.....................................................0.103
J/kg •°C........................................................... 431
Curie Temperature, °F........................................................... -193
°C.......................................................... -125
Permeability at 200 Oersted (15.9 kA/m).................. 1.0035
Coefficient of Expansion, 70 – 200°F, 10-6 in/in •°F........ 7.0
21 – 93°C, μm/m •°C............. 12.6
Thermal Conductivity, Btu • in/ft2• h•°F...............................83
W/m•°C........................................... 12.0
Electrical Resistivity, ohm • circ mil/ft.............................. 731
μΩ•m................................................. 1.22
g/cm3......................................................................... 8.28
Melting Point, °F......................................................2540 – 2600
°C......................................................1390 – 1430
Specific Heat, Btu/lb •°F.....................................................0.103
J/kg •°C........................................................... 431
Curie Temperature, °F........................................................... -193
°C.......................................................... -125
Permeability at 200 Oersted (15.9 kA/m).................. 1.0035
Coefficient of Expansion, 70 – 200°F, 10-6 in/in •°F........ 7.0
21 – 93°C, μm/m •°C............. 12.6
Thermal Conductivity, Btu • in/ft2• h•°F...............................83
W/m•°C........................................... 12.0
Electrical Resistivity, ohm • circ mil/ft.............................. 731
μΩ•m................................................. 1.22
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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