UNS N06601 High Temperature Nickel Alloys Inconel 601 Pipe ASME
Inconel 601 nickel-chromium-iron alloy is a general-purpose
engineering material for applications that require resistance to
heat and corrosion. The outstanding characteristic of Inconel 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 601 is listed in Table
1. The composition is a face-centered-cubic solid solution with a
high degree of metallurgical stability. The alloy’s nickel base, in
conjunction with a substantial chromium content, provides
resistance to many corrosive media and high-temperature
environments. Oxidation resistance is further enhanced by the
Inconel 601 is a nickel-chromium alloy, that is highly resistant to
oxidation through 2200°F. 601 alloy develops a tightly adherent
oxide scale which resists spalling even under severe thermal
cycling. The alloy has good high temperature strength, and retains
its ductility after long service exposure. 601 alloy has good hot
corrosion resistance under oxidizing conditions. 601 alloy is not
suggested for use in strongly reducing, sulfur bearing
For maximum oxidation resistance, 601 alloy should be welded with
matching composition 601 alloy GTAW wire. The weld fillers
developed for RA 602 CA can also provide a weld which is stronger and more oxidation
resistant than the 601 alloy base metal. 601 alloy is more
difficult to machine than 304 stainless steel. Its machinability
rating is 15-21% relative to AISI B1112 steel.
The most important property of Inconel 601 is resistance to
oxidation at very high temperatures up to 1250C. Even under severe
conditions such as, cyclical heating and cooling. This is possible
due to Inconel 601 having a tightly adherent oxide layer which is
resistant against spalling.
Resistance to carburization is good, also resistant to carbon
Due to high chromium and some aluminum content, good resistance in
oxidizing sulfur bearing atmospheres at elevated temperatures is
|Nickuel||58.0 - 63.0|
|Cromium||21.0 - 15.0|
|Alumnium||1.0 - 1.7|
Trays, baskets and fixtures used in various heat treatments such as
carburizing and carbon nitriding.
Refractory anchors, strand annealing and radiant tubes, high
velocity gas burners, wire mesh belts etc.
Insulating cans in ammonia reformers and catalyst support grids
used in nitric acid production.
Thermal reactors in exhaust system of petrol engines.
Fabricated combustion chambers.
Tube supports and ash trays in the power generation industry.