Incoloy 903 Round Bar

A nickel-iron-cobalt alloy with additions of niobium, titanium and aluminum for precipitation hardening. The alloy combines high strength with a low and constant coefficient of thermal expansion at temperatures to about 800°F (430°C). It also has a constant modulus of elasticity and is highly resistant to thermal fatigue and thermal shock. Used in gas turbines for rings and casings.STANDARD PRODUCT FORMSSheet, plate, rod, bar and forging stock.MAJOR SPECIFICATIONSUNS N19903LIMITING CHEMICAL COMPOSITION, %Ni.......36.0 – 40.0Fe.......RemainderCo...... 13.0 – 17.0Al.......0.30 – 1.15Ti.......1.00 – 1.85Nb.....2.40 – 3.50PHYSICAL CONSTANTS AND THERMAL PROPERTIESDensity, Ib/in3.........................................................................0.298g/cm3......................................................................... 8.25Melting Range, °F....................................................2405 – 2539°C....................................................1318 – 1393Specific Heat, Btu/lb•°F.....................................................0.105J/kg•°C............................................................ 442Curie Temperature, °F................................................780 – 880°C................................................415 – 470Coefficient of Expansion, 77 – 800°F, 10-6 in/in •°F........4.025 – 427°C, μm/m •°C............. 7.2Thermal Conductivity, Btu • in/ft2•h•°F............................ 116W/m •°C........................................... 16.7Electrical Resistivity, ohm •circ mil/ft................................ 379μΩ•m...............................................0.650TYPICAL MECHANICAL PROPERTIES