Incoloy® 825 & Compound Nickel Alloys

Chemical Analysis

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C

.05 max

MN

1.0 max

S

.03 max

Si

.5 max

Cr

19.5- 23.5

Ni

38.0- 46.0

Mo

2.5- 3.5

Cu

1.5- 3.0

Ti

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0.6- 1.2

Al

0.2 max

Fe

22.0 min

At

Incoloy® 825 Characteristics & Mechanical Properties

Alloy 825 is a compound metal alloy with a high nickel content. Due to various metal inclusions, UNS N possesses high corrosion resistance and favorable mechanical properties. Demonstrating broad usefulness with optimum machining characteristics and good weldability, Incoloy® is an ideal metal alloy for strenuous applications and corrosive environments.

Corrosion Resistance

Providing resistance to stress corrosion, the high nickel content prevents cracking and works with copper and molybdenum contents for chemical resistance to phosphoric and sulfuric acids. Including molybdenum compounds also reduces pitting and crevice corrosion from surface layer oxidization. Additionally, the chromium content provides additional resistance to other oxidizing substances, like nitric acid, nitrates, and salt. To protect against intergranular corrosion, Incoloy® alloy 825 also features titanium for increased stability.

Mechanical Properties

UNS N can withstand exposure to cryogenic temperatures and moderately high temperatures. However, microstructural changes can occur when exposed to temperatures above degrees Fahrenheit. With exceptional tensile and compressive yield strength properties, Incoloy® alloy 825 has a maximum tensile strength of 104,000 psi. It has good impact strength at room temperature and can retain its strength at subzero temperatures.

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UNS N or Incoloy® 825 is a nickel-iron-chromium alloy containing small amounts of titanium, copper, and molybdenum. Workable and resistant, alloy 825 features excellent characteristics and is a popular metal alloy used in challenging environments and high-performance applications. We carry many configurations of alloy 825 in a range of sizes, with metal fabrication and treatment services to meet your material requirements.At Magellan Metals , we are an industry-leading supplier of Incoloy® alloy products in several shapes and metal materials. Contact us for more information and we will be happy to assist you.Alloy 825 is a compound metal alloy with a high nickel content. Due to various metal inclusions, UNS N possesses high corrosion resistance and favorable mechanical properties. Demonstrating broad usefulness with optimum machining characteristics and good weldability, Incoloy® is an ideal metal alloy for strenuous applications and corrosive environments.Providing resistance to stress corrosion, the high nickel content prevents cracking and works with copper and molybdenum contents for chemical resistance to phosphoric and sulfuric acids. Including molybdenum compounds also reduces pitting and crevice corrosion from surface layer oxidization. Additionally, the chromium content provides additional resistance to other oxidizing substances, like nitric acid, nitrates, and salt. To protect against intergranular corrosion, Incoloy® alloy 825 also features titanium for increased stability.UNS N can withstand exposure to cryogenic temperatures and moderately high temperatures. However, microstructural changes can occur when exposed to temperatures above degrees Fahrenheit. With exceptional tensile and compressive yield strength properties, Incoloy® alloy 825 has a maximum tensile strength of 104,000 psi. It has good impact strength at room temperature and can retain its strength at subzero temperatures.

Heat Treatment

Alloy 825 cannot be strengthened by heat treatment. For elevated temperature applications or where the product is to be welded, a stabilization anneal around °F (940°C) is recommended. At this temperature, the carbon is tied up as titanium carbides. This prevents precipitation of chromium carbides at the grain boundaries (i.e., sensitization) from occurring in service or during welding. For optimum toughness and ductility, a higher temperature anneal may be performed.

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