Super Alloy INCOLOY Alloy 330 (UNS N08330)

Topics Covered

Chemical Composition
Physical Properties
Mechanical Properties
Other Designations


INCOLOY alloys are super alloys having nickel as the base metal. INCOLOYS are composed of nickel-chromium-iron as the principal elements. Additives such as molybdenum, copper, and nitrogen are added in order to enhance the corrosion resistance and strength of these alloys. These alloys can function efficiently even at elevated temperatures.

INCOLOY alloy 330 is an alloy comprising of nickel-iron-chromium with silicon as an additive. Using silicon as an additive gives the alloy enhanced oxidation resistance. This alloy exhibits good strength at high temperatures and good resistance to oxidation and reduction environments. The microstructure of the alloy maintains its stability even after being exposed to high temperatures for long durations. The standard forms in which the alloy is available are forging stock, pipe, tube, round bar, flat bar, hexagon and wire.

This datasheet will look into the chemical composition, properties and applications of INCOLOY 330.

Chemical Composition

The chemical composition of INCOLOY alloy 330 is given in the following table.

Element Content (%)
Iron, Fe 43
Nickel, Ni 34-37
Chromium, Cr 17-20
Manganese, Mn ≤2
Others Remainder

Physical Properties

The following table discusses the physical properties of INCOLOY alloy 330.

Properties Metric Imperial
Density 8.08 gm/cm3 0.292 lb/in3

Mechanical Properties

The mechanical properties of INCOLOY alloy 330 are tabulated below.

Properties Metric Imperial
Tensile strength(annealed) 600 MPa 87 ksi
Yield strength(annealed) 280 MPa 40.6 ksi
Elongation at Break 45% 45%

Other Designations

Some of the designations used to denote INCOLOY alloy 330 are listed below:

UNS N08330 SAE AMS 5592 SAE AMS 5716 SAE J405 SAE J412
ASTM B 511 ASTM B 512 ASTM B 535 ASTM B536 ASTM B546
ASTM B710 ASME SB-511 ASME SB-536 ASME SB-710  


INCOLOY alloy 330 is used in the following applications:-

  • Industrial heating
  • Furnaces, muffles, retorts and conveyor systems
  • Heat treating baskets and fixtures.

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