Alloy 330 (NiCr 40/20) is austenitic alloy dope with entity of titanium nitride has a high level of corrosion resistance, particularly to oxidation, carburization and nitridation. It has a solid solution composition and is not hardenable by heat treatment. Its oxidation resistance is enhanced by the silicon content. Can be carry out at temperatures up to 1100°C in neutral atmospheres. It is readily fabricated using standard procedures for stainless steels and nickel alloys.
Chemical composition
Nickel Ni 34-37% | Chromium Cr 17-20% | Iron Fe Balance | Carbon C 0.08% Max. | Silicon Si 0.75-1.5% | Manganese Mn 2.0% Max. |
Phosphorus P 0.030% Max. | Sulfur S 0.030% Max. |
Physical properties
Density g/cm3 | Electrical Resistivity at 20°C Ω mm2/m | Melting Point °C | Max Continuous Operating Temperature in Air °C | Magnetic Properties |
7.95 | 1.09 | 1400 | 1100 | Non-Magnetic |
Mechanical properties
Yield Strength Rp0.2 MPa |
Tensile Strength Rm MPa |
Elongation A% |
Hardness Hv |
245 | 580-750 | 30 | 220 |
Product forms
Product | Size (mm) | Condition of Supply |
Wire | 0.2 – 12.0 | Soft Annealed Semi-Hard Hard |
Stranded Wire | 5.0 – 60.0 | Hot Finished Cold Finished Peeled Bright Turned Bright Annealed |
Applications
Alloy 330 is used extensively in elevated temperatures where resistance to the combined effects of thermal cycling and carburization is required. It is using for industrial heating furnaces; for muffles, retorts, conveyor systems, baskets and boxes, and various fixtures:
- Chemical and petrochemical processing
- Ore processing
- Power generation
- Boiler fixtures
- Gas turbine components
- Thermal processing
- Heat-treat furnace containers
- Heat-treat furnace components
- High temperature fans
- Salt pots