Incoloy 803(UNS S35045）

1.Incoloy 803 INTRODUCTION

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.

2.Incoloy 803 STANDARD  PRODUCT FORMS

Pipe, tube, sheet, strip, plate, round bar, flat bar, forging  stock, ID finned tube and wire.

3.Incoloy 803 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

4.Incoloy 803 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

5.Incoloy 803 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

 Room temperature, as solution annealed.

6.Incoloy 803 TYPICAL MECHANICAL  PROPERTIES