Alloy Grade UNS: J21890 – Alloy Steel

  • Overview

    J21890 is an alloy steel that offers a balanced combination of strength and corrosion resistance. Its composition, primarily iron and chromium with the addition of up to 1.2% molybdenum, contributes to its versatility and suitability for various applications. The chromium content provides inherent resistance to oxidation and corrosion, while the molybdenum addition further enhances its strength and resistance to pitting corrosion. J21890 exhibits good tensile strength, making it capable of withstanding moderate stresses and loads. This combination of properties makes it a valuable choice for applications where a balance of strength, corrosion resistance, and affordability is desired.

  • Typical Uses

    Pump and valve components.

  • MetalTek Designation

    WC 9

  • Poured At:

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

Similar Specifications

Cast UNS: J21890

Wrought UNS: K21590

Cast Grade:

Cast ASTM: A217

Typical Chemical Composition (% by wt.)

Aluminum: n/a

Carbon: 0.05-0.18

Chromium: 2.00-2.75

Manganese: 0.40-0.70

Iron: BAL

Copper: n/a

Nickel: n/a

Lead: n/a

Tin: n/a

Silicon: 0.60

Zinc: n/a

Other: Mo 0.90-1.20

Minimum Mechanical Properties

Brinell Typical:

0

Tensile, ksi

0

Tensile, MPa

0

Calculated PREn (Minimum)

0

Yield, ksi

0

Yield, MPa

0

Elongation

0%

Heat Treatment: Normalized & Tempered

Frequently Asked Questions

Alloy steels are steels alloyed with elements such as chromium, nickel, molybdenum, or vanadium to improve mechanical properties and performance.

Alloy steels are used in aerospace structures, pressure vessels, pipelines, tools, and machinery requiring high strength and toughness.

Alloy steel differs from carbon steel by the addition of alloying elements like chromium, nickel, and molybdenum to improve mechanical properties and corrosion resistance.

Types include low-alloy steel (up to 8% alloying elements) and high-alloy steel (above 8%), tailored for strength, wear resistance, or toughness.

Commonly added elements include chromium, nickel, molybdenum, vanadium, manganese, silicon, and boron to enhance strength, hardness, and corrosion resistance.

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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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