Alloy Grade UNS: S21900 – Versatile Stainless Steel

  • Overview

    S21900, known as Nitronic 40 in its wrought form, is a versatile stainless-steel alloy that offers a compelling combination of high strength and good corrosion resistance. This alloy exhibits excellent mechanical properties, including high yield strength, making it suitable for applications requiring structural integrity and resistance to deformation. Furthermore, S21900 maintains its stability and performance across a wide range of temperatures, from sub-zero conditions to elevated temperatures, making it a versatile choice for diverse environments. Its good corrosion resistance protects it from degradation in various atmospheres, while its excellent weldability makes it readily adaptable to fabrication and construction processes. This combination of properties makes S21900 a valuable choice for applications demanding both strength and corrosion resistance across varying temperatures.

  • Typical Uses

    Aerospace parts and cryogenic applications.  

  • MetalTek Grade

    NITRONIC® 40

  • Poured At:

    Wisconsin Centrifugal Division, Wisconsin Investcast Division

* 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

Calculated PREn (Minimum)

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.