Alloy Grade UNS: CN3MN – Super Austenitic Alloy

  • Overview

    CN3MN, also known as MTEK 6XN, is a super austenitic stainless steel that offers exceptional corrosion resistance, even in the most challenging environments. This alloy excels in resisting various forms of corrosion, including chloride-induced stress corrosion cracking, crevice corrosion, and pitting corrosion, making it suitable for exposure to acids, alkalis, and salt solutions. With a composition of up to 25.5% nickel and 22% chromium, CN3MN surpasses the corrosion resistance of typical austenitic stainless steels. Its enhanced resistance to localized corrosion, combined with its good mechanical properties, makes CN3MN a valuable choice for applications in chemical processing, marine environments, and other demanding industries where superior corrosion resistance is critical.

  • Typical Uses

    Pump and valve components, desalination equipment, oil & gas applications, pulp & paper rolls, and chemical processing equipment.

  • MetalTek Grade

    MTEK 6XN

  • Poured At:

    Carondelet Division, Sandusky International Division, Wisconsin Centrifugal Division, Wisconsin Investcast Division

* Produced under license of Allegheny Ludium.

Similar Specifications

Cast UNS: J94651

Wrought UNS: N08367

Wrought Grade: AL6XN®

Cast Grade: CN3MN

Cast ASTM: A743, A744

Typical Chemical Composition (% by wt.)

Aluminum: n/a

Carbon: 0.03

Chromium: 20-22

Manganese: 2

Iron: n/a

Copper: n/a

Nickel: 23.5-25.5

Lead: n/a

Tin: n/a

Silicon: 1

Zinc: n/a

Other: Mo 6-7; N 0.18-0.26

Minimum Mechanical Properties

Tensile, ksi

0

Tensile, MPa

0

Calculated PREn (Minimum)

0

Yield, ksi

0

Yield, MPa

0

Elongation

0%

Heat Treatment: Solution Anneal

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Non-Ferrous

Non-ferrous alloys are, literally, materials that are not iron-based. While others may provide non-ferrous materials of other materials, the MetalTek family of non-ferrous alloys are copper-based. In general, these materials deliver high strength, and excellent wear and corrosion resistance. They are often found in marine applications and also bushing, bearing, and gear environments.
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Stainless Steel

Stainless steels owe their ability to resist corrosion primarily to the presence of a passive film on their surface. Chromium is chiefly responsible for formation of the passive film. Iron ceases to rust at approximately 12% chromium content and resistance to oxidizing corrosives increases rapidly with chromium content up to approximately 20%.
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