Heat Resistant Alloys
NAS H330
- JISー
- UNSN08330
- DIN/ENー
NAS H330 is a heat resistant nickel alloy with excellent high temperature strength, corrosion resistance, and metallurgical stability. In particular, it provides superior resistance to carburization and nitridation. Because it has a fully austenitic microstructure, it displays good workability. Nippon Yakin supplies NAS H330 in plate, sheet, and strip forms.
| Chemical Composition | 35Ni-18Cr-1.2Si |
|---|---|
| Product shape |
 Coil Sheet Plate |
| Workability | The hot workability and cold workability of NAS H330 are similar to those of conventional austenitic stainless steels. For hot working, a starting temperature of 1230℃ and finishing temperature of 980℃ are suitable. Cold workability is similar to that of conventional austenitic stainless steels. Work hardening tends to be slightly lower. Bending, drawing, and similar working are possible. |
| Weldability | 溶NAS H330 can be welded by TIG, MIG, and shield metal arc welding in the same manner as with conventional standard austenitic stainless steels. AWS ERNiCr-3 welding electrodes are frequently used. |
| Heat Treatment | Heat treatment of NAS H330 is similar to that of conventional austenitic stainless steels. The typical heat treatment is as follows: ・Solution heat treatment: 1040~1120℃ Carbide dissolution and strain removal are performed in the above solution heat treatment. |
| Pickling | Pickling is performed with a nitric-hydrofluoric acid solution or aqua regia solution (nitric-hydrochloric acid solution) in the same manner as with standard austenitic stainless steels. |
| Features | NAS H330 is used mainly in high temperature carburizing or nitriding atmospheres. It is most suitable for application in the 815~1150℃ temperature range. |
| Applications | ・Industrial furnace parts ・Heat treatment boxes in carburizing, nitriding and solution heat treatment ・Radiant tubes ・Petrochemical processing equipments |