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Inconel 601 Tube

Inconel 601 Tube


UNS N06601

Werkstoff Nr. 2.4851


INCONEL alloy 601 (UNS N06601/W.Nr. 2.4851) is a general-purpose engineering material for applications that require resistance to heat and corrosion. An outstanding characteristic of INCONEL alloy 601 is its resistance to high-temperature oxidation. The alloy also has good resistance to aqueous corrosion, has high mechanical strength, and is readily formed, machined and welded. The limiting chemical composition of INCONEL alloy 601 is listed in Table 1. The composition is a facecentered-cubic solid solution with a high degree of metallurgical stability. The alloy's nickel base, in conjunction with substantial chromium content, provides resistance to many corrosive media and hightemperature environments. Oxidation resistance is further enhanced by the aluminum content.


Alloy 601 is a standard material of construction for various types of thermal-processing equipment. Industrial-heating applications include baskets, trays, and fixtures for annealing, carburizing, carbonitriding, nitriding and other heat-treating operations. In industrial furnaces, the alloy is used for radiant tubes, muffles, retorts, flame shields, strand-annealing tubes, woven-wire conveyor belts, chain curtains, burner nozzles, and electrical resistance heating elements. Other thermal-processing applications are thermocouplethermocouple protection tube, furnace-atmosphere generators, and infrared radiant screens.



Chemical Composition, %
Ni        Cr        Al        C        Mn       Si      Fe
61.5    22.5     1.4     0.05      0.3      0.2      14



The properties of INCONEL alloy 601 make it a material of broad utility in such fields as thermal processing, chemical processing, pollution control, aerospace, and power generation.


ASTM Specifications

Pipe Smls Pipe Welded Tube Smls Tube Welded Sheet/Plate Bar Forging Fitting Wire
B167 B517 B167 - B168 B166 B564 B366 B166

Mechanical Properties
Typical room temperature Properties

Tensile (psi) .2% Yield (psi) Elongation (%)
80,000 30,000 35




INCONEL alloy 601 is a face-centered-cubic, solid-solution alloy with a high degree of metallurgical stability. Phases normally present in the alloy's microstructure include chromium carbides and titanium nitrides. Figure 8 shows the microstructure of solution-treated hot-finished rod. The large block-like structure visible in the photomicrograph is a particle of titanium nitride. The scattered small particles are chromium carbides.


Corrosion Resistance

The substantial nickel and chromium contents of INCONEL alloy 601 in conjunction with its content of aluminum give the alloy superior resistance to high temperature corrosion
mechanisms. Of particular significance is its resistance to oxidation at temperatures up to 2200 F (1200 C). By virtue of its contents of chromium and aluminum, alloy 601 offers
unique resistance to oxide spalling under cyclic thermal conditions.



Chemical Processing
Heat treating industry
Power generation
Heat treating muffles and retorts
Radiant tubes
Catalyst support grids in nitric acid production
Steam superheater tube supports

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