|
Element |
Min |
Max |
|
Carbon |
-- |
0.08 |
|
Manganese |
-- |
2.00 |
|
Silicon |
0.75 |
1.50 |
|
Chromium |
17.00 |
20.00 |
|
Nickel |
34.0 |
37.0L |
|
Phosphorous |
-- |
0.030 |
|
Sulfur |
-- |
0.030 |
|
Iron |
BAL |
|
General
Alloy 330 is an austenitic,
nickel-chromium-iron-silicon alloy that has outstanding resistance to oxidation
and carburization up to 2200°F with high strength.
The excellent resistance to oxidation and carburization is provided by the high
nickel and chromium content of the alloy, further enhanced by its silicon
content.
Alloy 330’s ultra high nickel content of 34 to 37% also
provides high resistance to chloride stress corrosion cracking and embrittlement
from the precipitation of sigma phase in most furnace atmospheres.
Alloy 330 also has a low coefficient of expansion, excellent ductility,
and high strength. Excellent High-Temperature Strength, Low Thermal Expansion
Characteristics, and Good Oxidation Resistance.
Fabrication
Haynes alloy
Alloy 330 is readily hot or cold formed using the standard procedures for
austenitic stainless steels and nickel alloys. The work hardening rate of the
alloy is comparable to austenitic stainless steels. Forming at room
temperature is suggested. If hot working is required, the alloy should be
heated uniformly to a starting temperature of 2050-2150°F (1120-1180°C) and
finished above 1750°F (950°C). Cooling should be by water quenching or as fast
as possible. Annealing is recommended after hot working to ensure maximum
corrosion resistance and optimum grain structure.Forming or bending should not
take place in the low ductility range of 1200-1600°F (650-870°C). This can
cause intergranular tearing in austenitic alloys.
Heat-Treatment
Alloy 330 is an
austenitic alloy that cannot be hardened by thermal treatment. Only cold
working will contribute to increased room temperature strength. For most high
temperature applications, 330 is not annealed after cold forming or welding.
If a full anneal is required, it should be carried out in a temperature range
of 1870-2050°F (1020-1120°C). Water quenching provides the optimum creep
resistance, but rapid air cooling to below 800°F (425°C) may also be utilized.
Applications
Alloy 330 has a wide
range of applications in Chemical and Petrochemical Processing, Power
Generation, and the Heat Treatment namely in the following fashions:
Furnace parts, heat-treat components and containers, heat exchangers,
petrochemical waste remediation units, and boiler fixtures among others.
Sheet and Plate
|
Test
Temperature |
Ultimate Tensile
Strength |
Yield Strength at
0.2% Offset |
Elongation in
4D |
|
Room |
70.0 (483) |
30.0 (207) |
30 |