Product Description
Designed for use in petrochemical, chemical and thermal processing applications, the alloy provides an exceptional level of high-temperature corrosion-resistance in oxidation, sulfidation, carburization and nitridation environments. In addition to thermal stability characteristics required to prevent thermal distortion and embrittlement, it exhibits excellent stress-rupture strengths. These characteristics, along with a high resistance to carburization and cyclic oxidation, make this alloy the material of choice for many severe applications including ID-finned pyrolysis tubing in high-severity ethylene furnaces.
STANDARD PRODUCT FORMS
Pipe, tube, sheet, strip, plate, round bar, flat bar, forging
stock, ID finned tube and wire.
stock, ID finned tube and wire.
MAJOR SPECIFICATIONS
UNS S35045
ASTM A 182, A 213, A 240, A 249, A 480
ASME Code Case 2304
ASME SA 182, SA 213, SA 240, SA 249, SA 480
ASTM A 182, A 213, A 240, A 249, A 480
ASME Code Case 2304
ASME SA 182, SA 213, SA 240, SA 249, SA 480
LIMITING CHEMICAL COMPOSITION, %
Ni....... 32.0 – 37.0
Fe.......Remainder
Cr......25.0 – 29.0
C........0.06 – 0.10
Mn........1.50 max.
S........ 0.015 max.
Si............ 1.0 max.
Cu........0.75 max.
Al.......0.15 – 0.60
Ti.......0.15 – 0.60
PHYSICAL CONSTANTS AND THERMAL PROPERTIES
Density, Ib/in3 (g/cm3)............................................ 0.284 (7.86)
Melting Range, °F (°C)..............2490 – 2555 (1365 – 1400)
Specific Heat, Btu/lb•°F (J/kg•°C).......................0.114 (479)
Permeability at 200 Oersted (15.9 kA/m).....................1.001
Coefficient of Expansion, 10-6 in/in•°F (μm/m•°C)
70-200°F (21-93°C)...................... 8.31 (15.0)
70-800°F (21-427°C)................... 9.14 (16.5)
70-1200°F (21-649°C)..................9.48 (17.1)
Thermal ConductivityA, Btu•in/ft2•h•°F (W/m•°C)........78 (11.3)
Electrical ResistivityA, ohm•circ mil/ft (μΩ•m)..........618 (1.03)
Young’s ModulusA, 106 psi (GPa)............................ 28.3 (195)
Shear’s ModulusA, 106 psi (GPa)............................ 10.7 (73.8)
Poisson’s RatioA....................................................................... 0.32
ARoom temperature, as solution annealed.
Melting Range, °F (°C)..............2490 – 2555 (1365 – 1400)
Specific Heat, Btu/lb•°F (J/kg•°C).......................0.114 (479)
Permeability at 200 Oersted (15.9 kA/m).....................1.001
Coefficient of Expansion, 10-6 in/in•°F (μm/m•°C)
70-200°F (21-93°C)...................... 8.31 (15.0)
70-800°F (21-427°C)................... 9.14 (16.5)
70-1200°F (21-649°C)..................9.48 (17.1)
Thermal ConductivityA, Btu•in/ft2•h•°F (W/m•°C)........78 (11.3)
Electrical ResistivityA, ohm•circ mil/ft (μΩ•m)..........618 (1.03)
Young’s ModulusA, 106 psi (GPa)............................ 28.3 (195)
Shear’s ModulusA, 106 psi (GPa)............................ 10.7 (73.8)
Poisson’s RatioA....................................................................... 0.32
ARoom temperature, as solution annealed.
TYPICAL MECHANICAL PROPERTIES

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