INCOLOY® alloy 330 (UNS N08330/W. Nr. 1.4886) is
an austenitic alloy with good high-temperature strength
and corrosion resistance. It has a solid solution
composition and is not hardenable by heat treatment. Its
high nickel and chromium provide good resistance to
oxidation and carburization. Its oxidation resistance is
enhanced by the silicon content.
The alloy’s strength and oxidation resistance at
elevated temperatures make it a useful material for
industrial heating furnaces; for muffles, retorts,
conveyor systems, baskets and boxes, and various
fixtures.
Limiting Chemical Composition, %
Nickel ..........................................................................34.0-37.0
Chromium....................................................................17.0-20.0
Iron ...............................................................................Balance*
Carbon........................................................................0.08 max.
Silicon..........................................................................0.75-1.50
Manganese ...................................................................2.0 max.
Phosphorus ..............................................................0.030 max.
Sulfur ........................................................................0.030 max.
Publication Number SMC-023
Copyright © Special Metals Corporation, 2003 (Oct 03)
INCOLOY and INCONEL are trademarks of the
Special Metals Corporation group of companies.
The data contained in this publication is for informational purposes only and
may be revised at any time without prior notice. The data is believed to be
accurate and reliable, but Special Metals makes no representation or warranty of
any kind (express or implied) and assumes no liability with respect to the
accuracy or completeness of the information contained herein. Although the
data is believed to be representative of the product, the actual characteristics or
performance of the product may vary from what is shown in this publication.
Nothing contained in this publication should be construed as guaranteeing the
product for a particular use or application.
*Reference to the ‘balance’ of a composition does not guarantee this
is exclusively of the element mentioned but that it predominates and
others are present only in minimal quantities.
Physical Properties
Density, lb/in3.....................................................................0.292
g/cm3......................................................................8.08
Melting Range, °F .....................................................2520-2590
°C .....................................................1380-1420
Specific Heat (32-212°F), Btu•lb•°F....................................0.11
(0-100°C), J/kg•°C ........................................460
Poisson’s Ratio at 70°F (20°C) ..........................................0.340
Permeability at 70°F (20°C) & 200 oersteds (15.9 kA/m) ....1.02
Coefficient of expansion data.
Temperature, °F
