Nickel Alloy 600, also sold under the brand
name Inconel® 600. It is a unique nickel-chromium alloy that is known for
its oxidation resistance at higher temperatures. It is highly versatile and can
be used in everything from cryogenics to applications that present elevated
temperatures up to 2000°F (1093°C). Its high nickel content, a minimum of
Ni 72%, combined with its chromium content, provides users of Nickel Alloy 600
a number of benefits including:
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Good oxidation resistance at high temperatures
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Corrosion resistance to both organic and inorganic compounds
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Resistance to chloride-ion stress corrosion cracking
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Works well with most alkaline solutions and sulfur compounds
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Lower rate of attack from chlorine or hydrogen chloride
Its chromium content gives the alloy
resistance to sulfur compounds and various oxidizing environments. The chromium
content of the alloy makes it superior to commercially pure nickel under
oxidizing conditions. In strong oxidizing solutions, like hot concentrated
nitric acid, 600 has poor resistance. Alloy 600 is relatively unattacked by the
majority of neutral and alkaline salt solutions and is used in some caustic
environments. The alloy resists steam and mixtures of steam, air, and carbon
dioxide.
Alloy 600 is non-magnetic, has excellent
mechanical properties and a combination of high strength and good workability
and is readily weldable. Alloy 600 exhibits cold forming characteristics
normally associated with chromium-nickel stainless steels.
Typical corrosion applications include
titanium dioxide production (chloride route), perchlorethylene syntheses, vinyl
chloride monomer (VCM), and magnesium chloride. Alloy 600 is used in chemical
and food processing, heat treating, phenol condensers, soap manufacture,
vegetable and fatty acid vessels and many more. Link to alloy 601 that
was developed to be more resistant to high-temperature oxidation than alloy
600.