Incoloy 800(UNS N08800 W.Nr.1.4876)

1.Incoloy 800 INTRODUCTION

A nickel-chromium alloy with good strength  and excellent resistance to oxidation  and carburization in high-temperature  atmospheres. It also resists corrosion by many  aqueous environments. The alloy maintains a  stable, austenitic structure during prolonged  exposure to high temperatures. Used for  process piping, heat exchangers, carburizing  equipment, heating-element sheathing and  nuclear steam-generator tubing.

2.Incoloy 800 STANDARD  PRODUCT FORMS

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

3.Incoloy 800 MAJOR  SPECIFICATIONS

UNS N08800 

BS 3072 – 3076 (NA15) 

ASTM B 163, A 240, B 366,  B 407 – B 409, A 480, B 514,   B 515, B 564, B 751,   B 775, B 829 

DIN 470 

Werkstoff Nr. 1.4876 

VdTüV 412 

ASME SB-163, SA-240,   SB-366, SB-407 – SB-409,  SA-480, SB-514, SB-515,  SB-564, SB-751, SB-775,  SB-829  

ASME Code Cases 1325,  1949, 2339, N-20 

SAE AMS 5766, 5871 

NACE MR-0175/ISO 15156 

ISO 9723 – 9725, 6207, 6208

4.Incoloy 800 LIMITING CHEMICAL  COMPOSITION, %

Ni......30.0 – 35.0 

Fe.........39.5 min.  

Cr......19.0 – 23.0 

C..........0.10 max. 

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 800 PHYSICAL CONSTANTS  AND THERMAL  PROPERTIES

Density, Ib/in3  (g/cm3)........................................... 0.287 (7.94) 

Melting Range, °F (°C).............2475 – 2525 (1357 – 1385)  

Specific Heat, Btu/lb•°F (J/kg•°C)........................ 0.11 (460) 

Curie Temperature, °F (°C)...................................-175 (-115) 

Permeability at 200 Oersted (15.9 kA/m)....................1.014 

Coefficient of Expansion, 10-6 in/in•°F (μm/m•°C) 

70-200°F (20-100°C)..................... 7.9 (14.4) 

Thermal ConductivityA , Btu•in/ft2•h•°F (W/m•°C).......80 (11.5) 

Electrical ResistivityA , ohm•circ mil/ft (μΩ•m)...... 595 (0.989)

6.Incoloy 800 TYPICAL MECHANICAL  PROPERTIES