Mar 4th 2020

XM-19 for valve stems

XM-19 is most widely specified for the production of valve stems, but what is this grade and why is it used? Most commonly known by the trademarks Nitronic 50 (AK Steel Corp) or Fermonic 50 (Langley Alloys), it is frequently specified against the United States ASTM reference of XM-19, the Euronorm 1.3964 caption, or the unified numbering system S20910 designation. It is an austenitic stainless steel, therefore in the same family as the more standard grades such as 304L and 316L.

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