Nimonic Pk33 Strip

A nickel-chromium-cobalt alloy that is precipitation hardenable and also contains a relatively high (7%) level of molybdenum for solid-solution strengthening. It has an exceptional combination of high-temperature strength, creep resistance and ductility when welded. The alloy is especially suitable for welded sheet structures. Used in gas turbines for flame tubes and other components.STANDARD PRODUCT FORMSSheet, plate, round bar, flat bar, forging stock, and extruded section.MAJOR SPECIFICATIONSNone applicable.LIMITING CHEMICAL COMPOSITION, %Ni .......RemainderCr......16.0 – 20.0Co .....12.0 – 16.0Mo .........5.0 – 9.0Ti ...........1.5 – 3.0Al ...........1.7 – 2.5C ..........0.07 max.Si ...........0.5 max.Cu..........0.2 max.Fe ..........1.0 max.Mn .........0.5 max.S .......0.015 max.B .......0.005 max.Zr .........0.06 max.PHYSICAL CONSTANTS AND THERMAL PROPERTIESDensity, Ib/in3 ........................................................................0.297g/cm3 .........................................................................8.21Melting Range, °F ...................................................2340 – 2450°C ...................................................1300 – 1345Specific Heat, Btu/lb • °F ....................................................0.100J/kg • °C ...........................................................419Permeability at 200 Oersted (15.9 kA/m) .................1.0005Coefficient of Expansion, 68 – 212°F, 10-6 in/in • °F........6.720 – 100°C, µm/m • °C .........12.1Thermal Conductivity, Btu • in/ft2 • h • °F ..........................78.3W/m • °C ..........................................11.3Electrical Resistivity, ohm • circ mil/ft ...............................758µ Ω• m ................................................1.26TYPICAL MECHANICAL PROPERTIES(Annealed)Tensile Strength, ksi ...................................................120 - 140MPa ................................................827 - 965Yield Strength (0.2% Offset), ksi .................................40 - 60MPa .........................276 - 414Elongation, % ....................................................................40 – 60(Cold Worked)Tensile Strength, ksi ...................................................160 – 260MPa ...........................................1103 – 1792Yield Strength (0.2% Offset), ksi ............................120 - 240MPa .......................827 – 1655Elongation, % ....................................................................10 – 30(Cold Worked + Aged)Tensile Strength, ksi ...................................................180 – 280MPa ...........................................1241 – 1930Yield Strength (0.2% Offset), ksi ............................170 – 270MPa ....................1172 - 1861Elongation, % ....................................................................10 – 20