Alloy 803 is an iron-nickel-chromium alloy. The nickel and chromium contents are higher than those of Alloys 800H and 800HT. A cost -effective material which provides an exceptional level of high-temperature corrosion resistance in oxidation, sulfidation and carburization environments.
Alloy 803 exhibits excellent stress-rupture strengths at elevated temperatures. These characteristics, along with high resistance to carburization and cyclic oxidation, make Alloy 803 the material of choice.
Alloy 803 is designed for use in petrochemical, chemical and thermal processing applications including ID-finned pyrolysis tubing in high-severity ethylene furnaces.