Corrosion Resistant Alloys
NAS NW276
- JISNW 0276
- UNSN10276
- DIN/EN2.4819
, comparable to Hastelloy® C-276 Alloy
NAS NW276 is a Ni-Cr-Mo alloy with excellent corrosion resistance in both oxidizing and reducing atmospheres. In this alloy, carbide precipitation in the heat affected zone (HAZ) is suppressed and corrosion resistance is improved by reducing the contents of C and Si. Based on these features, NAS NW276 is widely used in materials under severe environments such as chemical plants. Nippon Yakin supplies this product in plate, sheet and strip forms.
*Hastelloy is a registered trademark of Haynes International, Inc.| Chemical Composition | 59Ni-15Cr-16Mo-4W-5Fe |
|---|---|
| Product shape |
 Coil Sheet Plate |
| Workability | Because the high-temperature strength of NAS NW276 is extremely higher than that of Type 304, care is required when hot working. The cold workability of NAS NW276 is basically the same as that of standard austenitic stainless steels such as Type 304, Type 316, etc. However, the fact that this is a high strength material must be considered in cold working. |
| Weldability | In welding, it is possible to apply ordinary welding methods in the same manner as with stainless steels. Matching composition welding consumables should be used. Post-weld heat treatment is not required. |
| Heat Treatment | Solution annealing of NAS NW276 is normally performed at the temperature range from 1150 to 1170℃ followed by being quenched in water or rapidly cooled by other means. |
| Pickling | 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. |
| Applications | Heat exchangers, centrifugal separators, driers, reaction vessels, salt manufacturing plants, flue gas desulfurization plants |