INCOLOY® Alloy 803

  • S35045
  • N/A

Key properties

(in annealed condition)
Tensile strength: 85.00–91.00
Yield strength: 40.00–45.00
Elongation: 45.00–50.00%

Composition

Ni

32.00-37.00%

Cr

25.00-29.00%

Mn

1.50% max

Si

1.00% max

Cu

0.75% max

Al

0.15-0.60%

Ti

0.15-0.60%

C

0.06-0.10%

S

0.01% max

Fe

Balance

INCOLOY® alloy 803 is an improved high temperature material characterised by excellent resistance to oxidation, sulphidation, carburization and nitridation as a result of the chemical composition employed. The material exhibits good long term thermal stability, excellent stress rupture characteristics which together with a good

fabrication capability has caused the material to be used in the latest generation of reformer furnaces as internally finned pyrolysis tubing particularly in ethylene service. Compatible welding consumables are available and good welding characteristics are excellent in the forming of harps with associated weldolets.

Welding consumables

Welding electrodes: 117
Fillers: 617