Designated as UNS N08330 or DIN W.Nr. 1.4886, Incoloy 330 (also known as “Alloy 330”) is an iron-nickel-chromium alloy with deliberately controlled addition of silicon to improve its oxidation resistance. It has a solid solution composition and is not hardenable by heat treatment. The high nickel and chromium contents provide excellent resistance to oxidation and carburization. Alloy 330 has very good high-temperature strength and corrosion resistance, as well as excellent workability and weldability. It is mainly used for industrial heating furnaces, muffles, flare tips, alloy gridss, bar baskets, gas turbine components, boiler fixtures, and other high-temperature components.

1. Chemical Composition Requirements

The Chemical Composition of Incoloy 330, %
Nickel	34.0-37.0
Chromium	17.0-20.0
Iron	Balance
Carbon	≤0.08
Silicon	0.75-1.50
Manganese	≤2.00
Phosphorus	≤0.030
Sulfur	≤0.030

2. Physical Properties of Incoloy 330

Density		Melting Range		Specific Heat	Permeability
g/cm3	lb/in3	°F	°C	J/kg.°C	@ 200 oersteds
8.08	0.292	2520-2590	1380-1420	460	1.02

3. Mechnaical Properties of Incoloy 330

Tensile Strength		Yield Strength		Elongation
Mpa	ksi	Mpa	ksi	%
552-621	80-90	221-290	32-42	35-45

4. Product Forms and Standards

Product Form	Standard
Bars and shapes	ASTM B511
Billets and bars	ASTM B512
Seamless pipes and tubes	ASTM B535, B829
Weld pipes and tubes	ASTM B546, B710, B739
Plates, sheets and strips	ASTM B536
Welded fittings	ASTM B366
Forging	SAE AMS 5716

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