Alloy Grade UNS: CK20 – “300” Series Alloy

  • Overview

    CK20, also known as S31000 in its wrought form, is a versatile "300 series" stainless steel alloy that offers a balanced combination of strength, toughness, and corrosion resistance. This alloy, containing up to 27% chromium and 22% nickel, exhibits good resistance to a wide range of corrosive environments. In addition to its corrosion resistance, CK20 provides good strength, wear resistance, and galling resistance, making it suitable for applications involving moderate mechanical stress and friction. Its inherent toughness allows it to absorb significant impact energy without fracturing, making it a reliable choice for applications where resistance to shock and vibration is important. This combination of properties makes CK20 a valuable choice for diverse applications requiring a balance of performance and durability.

  • Typical Uses

    Chemical processing equipment, food & beverage, pump and valve parts, and nuclear applications.

  • MetalTek Grade

    MTEK 310

Similar Specifications

Cast UNS: J94202

Wrought UNS: S31000

Wrought Grade: 310

Cast Grade: CK20

Cast ASTM: A351, A743

Military/AMS: AMS 5365

* AMS specifying sand casting.

Typical Chemical Composition (% by wt.)

Aluminum: n/a

Carbon: 0.2

Chromium: 23-27

Manganese: 1.5

Iron: n/a

Copper: n/a

Nickel: 19-22

Lead: n/a

Tin: n/a

Silicon: 1.75

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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