Alloy Grade UNS: CN7M – High Nickel Non-Magnetic

  • Overview

    CN7M has a high nickel content and with the addition of molybdenum and copper, this alloy has good resistance to sulphuric acid and many other reducing chemicals. It will resist dilute hydrochloric acid and chloride salt solutions. It does require solution annealing after exposure to temperatures between 800° and 1600° F. Wholly austenitic, this alloy is non-magnetic. The castings of this alloy have excellent machinability and fair welding characteristics.

  • Typical Uses

    Heat exchanger parts, flanges, pickling rolls, pump parts, tank accessories, valve components, and centrifuge parts for chemical processing.

  • MetalTek Grade

    MTEK 20

Similar Specifications

Cast UNS: N08007

Wrought UNS: N09020

Wrought Grade: 20Cb-3®

Cast Grade: CN7M

Cast ASTM: A351, A743, A744

Typical Chemical Composition (% by wt.)

Aluminum: n/a

Carbon: 0.07

Chromium: 19-22

Manganese: 1.5

Iron: n/a

Copper: 3.0-4.0

Nickel: 27.5-30.5

Lead: n/a

Tin: n/a

Silicon: 1.5

Zinc: n/a

Other: Mo 2-3

Minimum Mechanical Properties

Tensile, ksi

0

Tensile, MPa

0

Yield, ksi

0

Yield, MPa

0

Elongation

0%

Heat Treatment: Solution Anneal

Explore Other Alloys

Gears

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.
Stainless Steel Parts

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%.
Petrochemical Fittings

Specialty Alloys

Specialty Alloys comprise a broad group of materials that deliver properties for more demanding applications, use more exotic or expensive materials, or require special processes to manufacture. Where standard materials may not offer desired performance, specialty alloys (including those that are modified further) may be a sensible selection.