High Strength Stainless Steels

NAS XM-19 (UNS S20910)

NAS XM-19 is a nitrogen-strengthened austenitic stainless steel with excellent corrosion resistance. In comparison with Type 316L, NAS XM-19 provides higher corrosion resistance and higher strength. Nippon Yakin supplies this product in plate, sheet and strip forms.

  • Image: Coil
  • Image: Sheet
  • Image: Plate


Hot and cold workability are substantially the same as other austenitic stainless steels. However, in both hot working and cold working, the fact that this is a high strength material must be considered.


Welding is possible by TIG, MIG, and shielded metal arc welding in the same manner as with standard austenitic stainless steels. ER209 welding rods, which have the same composition, are frequently used.

Heat Treatment

Solution annealing of NAS XM-19 is normally performed at the temperature range from 1065 to 1120℃ followed by being quenched in water or rapidly cooled by other means.


A mixture of nitric acid and fluoric acid is used in pickling. However, because descaling is somewhat difficult in comparison with Type 304, alkali immersion before acid pickling, and if possible, shot blasting are extremely effective.


Chemical plants, spent nuclear fuel containers (casks), heat exchanger components, pumps, structural components


NAS XM-19 Spec Sheet (PDF 179KB)

High Strength Stainless Steels

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