INCONEL 825

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Incoloy 825®, Nickelvac® 825, Nicrofer® 4221

Incoloy® alloy 825 is a nickel-iron-chromium alloy with additions of copper, molybdenum and titanium. The alloy's chemical composition is designed to provide exceptional resistance to many corrosive environments. The nickel content is sufficient for resistance to chloride-ion stress corrosion cracking. The nickel, in conjunction with the molybdenum and copper, also gives outstanding resistance to reducing environments such as those containing sulfuric and phosphoric acids. the molybdenum also aids resistance to pitting and crevice corrosion. The alloy's chromium content confers resistance to a variety of oxidizing substances such as nitrates, nitric acid and oxidizing salts. The titanium addition serves, with an appropriate heat treatment, to stabilize the alloy against sensitization to intergranular corrosion. The resistance of Incoloy® 825 to general and localized corrosion under diverse conditions gives the alloy broad usefulness. Applications include chemical processing, pollution control, oil and gas recovery, acid production, pickling operations, nuclear fuel reprocessing and handling of radioactive wastes. Incoloy 825® is a nickel-iron- chromium alloy with titanium, copper, and molybdenum. Incoloy ® 825's chemical composition provides great resistance to many corrosive environments, such as pitting, crevice corrosion, intergranular corrosion, and stress- corrosion cracking. Incoloy 825® has good mechanical properties from moderately to high temperatures. The hot- working range for Incoloy 825® is 1600 to 2150º F. The material has good weldability by all conventional processes. Available forms are Inconel 825 Seamless Pipe, Inconel 825 Welded Pipe, Inconel 825 seamless tube, Inconel 825 Welded Tube, Inconel 825 Round Bars, Inconel 825 wire, Inconel 825 Sheet, Inconel 825 Plate, Inconel 825 Forgings, Inconel 825 Pipe Fittings and Inconel 825 Flanges.

Chemical Analysis of ALLOY 825 (UNS N08825)

C

MN

P

S

Si

Cr

Ni

Mo

Cu

Co

Cb+Ta

Ti

Al

Fe

Other

.05 max

1.0 max

.03 max

.5 max

19.5 - 23.5

38.0 - 46.0

2.5 - 3.5

1.5 - 3.0

0.6 1.2

0.2 max

22.0 min

3.15 4.15

Specification:-

Sheet / Plate	ASME SB-424
Round Bar	ASME SB-425
Pipe	ASME SB-423 / ASME SB-829 / ASME SB-705 / ASME SB-775
Tube	ASME SB-163 / ASME SB-704 / ASME SB-751
Fittings	ASME SB-366
Forgings	ASME SB-564

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