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We are a world-class supplier of engineering raw materials. Our objective is to provide all our customers, from the small machine shop to the large multi-national corporation, a supply path that continuously delivers the highest levels of service, quality and value.

UNS S20910 (Nitronic® 50, XM-19)

Austenitic Stainless Steel

Nitronic® 50 - UNS S20910 (XM-19) Stainless Steel

This highly alloyed austenitic stainless steel offers a combination of good mechanical strength (approaching twice that of Type 316 stainless steel) and high corrosion resistance.

Good Mechanical Properties

The mechanical properties at both elevated and sub-zero temperatures are very good and, unlike many austenitic stainless steels, the alloy does not become magnetic when cold worked or cooled to sub-zero temperatures. In the cold-worked condition, the material possesses a yield strength up to over three times that of Type 316 stainless steel.

Corrosion Resistance

UNS S20910/XM-19 stainless steel provides outstanding resistance to general corrosion and is superior in this respect to Types 316/316L and 317/317L in many media. The 1950°F (1066°C) annealed condition provides adequate corrosion resistance for many applications combined with a high strength level. Where the material is to be employed in the as-welded condition or in very corrosive media, the 2050°F (1121°C) annealed condition should be chosen. Material in the high strength cold-worked condition is often specified for bolting and shafting, but there is some small compromise in terms of corrosion resistance in some environments when compared with the annealed condition. The resistance to selective attack such as crevice corrosion for UNS S20910/XM-19 stainless steel (annealed) is superior to that of Type 316/316L. In common with most austenitic stainless steels for example Types 304 and 316, XM-19 steel may suffer stress corrosion cracking in hot chloride ion containing environments.

Typical Applications

Commercial applications for this engineering material include:

  • Shafts
  • Stems and pins in valves
  • Chokes and pumps in oil & gas industry
  • Mechanical components in nuclear installations
  • Boat shafting
  • Bolting and rigging

We stock Nitronic® 50 (UNS S20910, XM-19) in round bar.

Technical Assistance

Our knowledgeable staff and resident metallurgists will be pleased to assist you further on any technical topic. Smiths Metal Centres Limited also boasts an in-house UKAS Accredited Testing Laboratory which is unique within the multi-metal and plastic stockholding sector. We believe this underlines our total commitment to quality and our ethos of being the complete service provider.

Additional Info

A technical datasheet for Nitronic® 50 (UNS S20910, XM-19) is available in PDF file format. To view and download, please click here.

We offer in-house processing options - for more information, please refer to our processing services.

Read our corporate brochure by clicking here.

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