Nippon Yakin Kogyo NASXM-19 High Strength Stainless Steels

Manufacturer: Nippon Yakin Kogyo Co., Ltd
Model : NASXM-19

NASXM-19 (UNS S20910)

High Strength, High Corrosion Resistance Stainless Steel
NASXM-19 is a nitrogen-strengthened austenitic stainless steel with excellent corrosion resistance. In comparison with Type 316L, NASXM-19 provides higher corrosion resistance and higher strength. Nippon Yakin supplies this product in plate, sheet, and strip forms.

Chemical Composition21Cr-12Ni-5Mn-2Mo-0.2Nb-0.2V-0.3N

Product shape

CoilSheet

Plate

WorkabilityHot 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.
WeldabilityYou can weld it using TIG, MIG, and shielded metal arc welding, just as you would with standard austenitic stainless steels. Frequently, use ER209 welding rods, which have the same composition.Not only are ER209 welding rods frequently used, **but they also** have the same composition.
Heat TreatmentSolution annealing of NASXM-19 is normally performed at the temperature range from 1065 to 1120°C followed by being quenched in water or rapidly cooled by other means.
PicklingA mixture of nitric acid and fluoric acid is used in pickling. However, since descaling is more difficult compared to Type 304, first immerse the material in alkali before acid pickling, and, if possible, use shot blasting for better results.
ApplicationsChemical plants, Spent nuclear fuel containers (casks).

Steel Grade/Standard

Nippon Yakin GradeJISASTM
NASXM-19UNS S20910

Chemical Composition

CSiMnPSNiCrMoNbVN
Specification
(UNS S20910)
≤0.06≤0.754.00–6.00≤0.040≤0.03011.5–13.520.5–23.51.50–3.000.10–0.300.10–0.300.20–0.40

Physical Properties

Density [g/cm³]7.88
Specific heat [J/kg · K]487
Electrical resistivity [μΩ · cm]81
Thermal conductivity
[W/m · K]
13.2
Average coefficient of thermal expansion
[10⁻⁶/°C]
24–100°C 15.8
24–200°C 16.4
24–300°C 16.9
24–400°C 17.3
Young’s modulus [MPa]19.8 × 10⁴
MagnetismNone
Melting range [°C]1380–1406

Mechanical Properties

Specification0.2% proof stress [MPa]Tensile strength [MPa]Elongation [%]Hardness [HRBW]
Hot-rolled plate
(UNS S20910)
3806902355241
Cold-rolled sheet
(UNS S20910)
415725230100

Work Hardening

Nippon Yakin Kogyo NASXM-19 High Strength Stainless Steels

 

Corrosion Resistance

NASXM-19 possesses higher corrosion resistance than Type 316L.

Workability

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.

Weldability

You can weld using TIG, MIG, and shielded metal arc welding in the same way as with standard austenitic stainless steels. Frequently, welders use ER209 rods, which have the same composition.

Heat Treatment

To perform solution annealing of NASXM-19, heat it to a temperature range of 1065 to 1120°C, then quench it in water or rapidly cool it by other means.

Pickling

Use a mixture of nitric acid and hydrofluoric acid for pickling. However, since descaling is more difficult compared to Type 304, immerse the material in alkali before acid pickling, and, if possible, apply shot blasting for better effectiveness.

Applications

  • Chemical plants
  • Spent nuclear fuel containers (casks)

 

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