Alloy 330 Stainless Steel

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...
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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 %)





Nickel34.0 - 37.0Chromium17.0 - 20.0
IronBalance*Carbon0.08 max.
Silicon0.75 - 1.50Manganese2.0 max.
Phosphorus0.030 max.Sulfur0.030 max.

*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

Linear Coefficient of Thermal Expansion


Thermal and Electrical Properties

TemperatureThermal ConductivityElectrical Resistivity


°F°CBtu-in/ft2M/-h-°FW/m-°Cohm-circ mil/ftmW-m
75248612.46121.017
40020410815.66491.079
80022713419.36881.144
120064916223.47211.199
160087119828.67441.237
180098221631.27491.245


Mechanical Properties

Typical Room Temperature Mechanical Properties, Mill Annealed

Yield Strength
0.2% Offset
Ultimate Tensile
Strength
Elongation
in 2 inches (50mm)
Hardness

ksi(MPa)ksi(MPa)%Rockwell B
30 - 43207 - 29680 - 85552 - 58640 - 4570 - 85


High Temperature Mechanical Properties
Tensile Properties of Annealed Material


Tensile Properties of Annealed Material


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