Alloy 330 Stainless Steel

Alloy 330 Stainless Steel

General Properties

Alloy 330 (UNS N08330) is an austenitic nickel-iron-chromium alloy developed to provide excellent resistance to carburizing and oxidizing atmospheres at elevated temperatures. With a nickel content of 34 to 37 percent, the alloy remains highly resistant to both chloride stress corrosion cracking and embrittlement from the precipitation of sigma phase.

The high nickel and chromium content provides excellent resistance to both oxidation and carburization. The oxidation resistance is also enhanced by the silicon content of the alloy. The alloy performs well under cyclic conditions of heating and cooling and in alternate carburizing and oxidizing atmospheres.

Alloy 330 offers a high level of corrosion resistance, particularly to oxidation, carburization, and nitridation. It is readily fabricated using standard procedures for stainless steels and nickel alloys. The alloy is used extensively in elevated temperature atmospheres where resistance to the combined effects of thermal cycling and carburization is required.

Chemical Analysis

Typical Values (Weight %)

*Alloy predominates remaining composition. Other elements may be present only in minimal quantities.

Physical Properties

Density

0.292 lbs/in3
8.08 g/cm3

Specific Heat

0.11 BTU/lb°F (32-212°F)
460 J/kg°C (0-100°C)

Magnetic Permeability

1.02 at 70°F/20°C (RT)

Linear Coefficient of Thermal Expansion

Thermal and Electrical Properties

Mechanical Properties

Typical Room Temperature Mechanical Properties, Mill Annealed

High Temperature Mechanical Properties
Tensile Properties of Annealed Material