N08800

Introduction

INCOLOY alloys belong to the category of super austenitic stainless steels. These alloys have nickel-chromium-iron as the base metals, with additives such as molybdenum, copper, nitrogen and silicon. These alloys are known for their excellent strength at elevated temperatures and good corrosion resistance in a variety of corrosive environments.

INCOLOY alloy 800 is an alloy of nickel, iron and chromium. The alloy is capable of remaining stable and maintaining its austenitic structure even after long time exposures to high temperatures. Other characteristics of the alloy are good strength, and high resistance to oxidizing, reducing and aqueous environments. The standard forms in which this alloy is available are round, flats, forging stock, tube, plate, sheet, wire and strip.

This datasheet will look into the chemical composition, properties and applications of INCOLOY 800.

Chemical Composition

The chemical composition of INCOLOY alloy 800 is given in the following table.

Physical Properties

The following table discusses the physical properties of INCOLOY alloy 800.

Mechanical Properties

The mechanical properties of INCOLOY alloy 800 are tabulated below.

Other Designations

Some of the designations used to denote INCOLOY alloy 800 are listed below:

Fabrication

Machinability

Machining characteristics of this INCOLOY alloy 800 are similar to that of iron-based alloys. This alloy tends to work-harden during machining.

Welding

INCOLOY alloy 800 can be welded by common welding techniques, using a matching filler metal.

Forming

This alloy exhibits good ductility and hence can be formed using conventional methods.

Hot working

INCOLOY alloy 800 can be hot worked at temperature ranges of 871-1232°C (1600-2250°F).

Cold Working

Cold working may be done on the alloy using standard tooling.

Annealing

INCOLOY alloy 800 may be annealed after cold working. Annealing should be done at 982°C (1800°F) for 15 min and then the alloy should be air cooled.

Applications

INCOLOY alloy 800 is used in the following applications:

• Heat exchangers
• Carburising equipment
• Heating elements
• Sheathing and nuclear steam generator tubing.

Form

Specification

Supply Form

Others

Sheet