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Inconel 690 Bars

Inconel 690 Bars
Inconel 690 Bars
Product Code : 01234
Brand Name : Tigweld arc
Product Description
Inconel 690 Bars

NCONEL alloy 690 is a high-chromium nickel alloy having excellent resistance to many corrosive aqueous media and high-temperature atmospheres. The alloy’s high chromium content gives it excellent resistance to aqueous corrosion by oxidizing acids (especially nitric acid) and salts, and to sulfidation at high-temperatures. In addition to its corrosion resistance, alloy 690 has high strength, good metallurgical stability, and favourable fabrication characteristics.

INCONEL® alloy 690 is a high chromium content version of INCONEL® alloy 600 with excellent resistance to many oxidising acids and salts and some resistance to sulphidation at elevated temperatures. The resistance in Nitric acid plus hydrofluoric acid mixtures lends itself to pickle shop duties. However the superior stress cracking resistance of the alloy caused it to supercede INCONEL® alloy 600 in steam generation nuclear reactors for piping, separators and weldments. More recently the alloy has superceded INCONEL® alloy 601 as the material of choice for metal dusting environments, which in conjunction with INCONEL® alloy 693 have created an excellent engineering material for the latest designs of compact reformers and Fischer -Tropsch syngas generation units.
NCONEL® alloy 690 (UNS N06690/W. Nr. 2.4642) is a high-chromium nickel alloy having excellent resistance to many corrosive aqueous media and high- temperature atmospheres. In addition to its corrosion resistance, alloy 690 has high strength, good metallurgical stability, and favorable fabrication characteristics.

The substantial chromium content gives the alloy outstanding resistance to oxidizing chemicals and to high-temperature oxidizing gases. The high level of nickel imparts resistance to stress- corrosion cracking in chloride-containing environments as well as to sodium hydroxide solutions.

The properties of INCONEL® alloy 690 are useful for various applications involving nitric or nitric/hydrofluoric acid solutions. Examples are tail-gas reheaters used in nitric acid production and heating coils and tanks for nitric/hydrofluoric solutions used in pickling of stainless steels and reprocessing of nuclear fuels.

The alloy’s resistance to sulfur-containing gases makes it an attractive material for such applications as coal-gasification units, burners and ducts for processing sulfuric acid, furnaces for petrochemical processing, recuperators, incinerators, and glass vitrification equipment for radioactive waste disposal.

 


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