Alloy Grade UNS: CH20 – Austenitic Alloys

  • Overview

    CH20 is an austenitic stainless steel that stands out for its impressive combination of strength and corrosion resistance. With a composition of up to 26% chromium and 15% nickel, this alloy exhibits good tensile strength and ductility, making it suitable for applications requiring both strength and formability. The high chromium and nickel content contribute to its excellent corrosion and oxidation resistance, protecting it from degradation in a variety of environments. This combination of properties makes CH20 a valuable choice for applications where both mechanical performance and resistance to corrosive elements are essential.

  • Typical Uses

    Pump and valve parts, food & beverage, and waste treatment equipment.

  • MetalTek Grade

    MTEK 309

Similar Specifications

Cast UNS: J93400

Wrought UNS: S30900

Wrought Grade: 309

Cast Grade: CH20

Cast ASTM: A351, A743

Typical Chemical Composition (% by wt.)

Aluminum: n/a

Carbon: 0.2

Chromium: 22-26

Manganese: 1.5

Iron: n/a

Copper: n/a

Nickel: 12.0-15.0

Lead: n/a

Tin: n/a

Silicon: 2

Zinc: n/a

Minimum Mechanical Properties

Tensile, ksi

0

Tensile, MPa

0

Yield, ksi

0

Yield, MPa

0

Elongation

0%

Heat Treatment: Solution Anneal

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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.