Alloy Grade UNS: S21900 – Versatile Stainless Steel

  • Overview

    S21900 is a very versatile stainless steel alloy with high yield strength and good corrosion resistance. This metal alloy is referred to as Nitronic 40 as its wrought form and is very stable at sub-zero temperatures and higher ones. It is also very weldable as an alloy. It contains up to 21.5% chromium and up to 7.5% nickel.

  • Typical Uses

    Aerospace parts and cryogenic applications.  

  • MetalTek Grade

    NITRONIC® 40

* Produced under license of AK Properties / ARMCO Advance Materials Corp.

Similar Specifications

Wrought UNS: S21900

Wrought Grade: NITRONIC® 40

Typical Chemical Composition (% by wt.)

Aluminum: n/a

Carbon: 0.08

Chromium: 19.0-21.5

Manganese: 8.0-10.0

Iron: n/a

Copper: n/a

Nickel: 5.5-7.5

Lead: n/a

Tin: n/a

Silicon: 1

Zinc: n/a

Other: N 0.15-0.40

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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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.
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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%.
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