Alloy Grade UNS: CK3MCuN – Corrosion Resistant

  • Overview

    CK3MCuN is a high-performance austenitic stainless-steel alloy specifically formulated for exceptional corrosion resistance, even in challenging chloride-rich environments. With a composition of up to 20.5% chromium and 19.5% nickel, this alloy exhibits remarkable resistance to various forms of corrosion, including pitting and crevice corrosion, particularly in seawater and other aggressive media. Its low carbon content of 0.025% ensures a fully austenitic microstructure, contributing to its excellent corrosion resistance and weldability. This combination of properties makes CK3MCuN a valuable choice for applications where superior corrosion resistance in harsh environments is paramount.

  • Typical Uses

    Chemical and food processing equipment, desalination equipment, impellers, process piping exposed to flue gas.

  • MetalTek Grade

    254 SMO®

  • Poured At:

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

* Produced under license of Avesta.

Similar Specifications

Wrought UNS: S31254

Wrought Grade: 254 SMO®

Cast ASTM: A351, A743, A744

Typical Chemical Composition (% by wt.)

Aluminum: n/a

Carbon: 0.025

Chromium: 19.5-20.5

Manganese: 1.2

Iron: n/a

Copper: 0.5-1.0

Nickel: 17.5-19.5

Lead: n/a

Tin: n/a

Silicon: 1

Zinc: n/a

Other: Mo 6-7; N 0.18-0.24

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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