We want to talk about how a material, sometimes does not decide to say good or bad, each material has its characteristics, expensive things work well, good things are expensive. To talk about the characteristics of iron-chromium aluminum and nickel-chromium, first of all, we must understand the nature of the two formers is a ferrite organization of the alloy material, the latter is an austenitic organization of the alloy material. In addition, there are some special-purpose electric heating alloy wires such as tungsten wire, molybdenum wire, and so on.
What is the difference between chromium and nickel?
Iron chromium aluminum and nickel-chromium have their differences:
1. High service temperature, such as HRE iron-chromium aluminum alloy wire in the atmosphere of the maximum service temperature of up to 1400 ° C
2. Long service life
3. Large permissible surface load
4. Good antioxidant performance, the oxidation of the AI2O3 film with good resistance and high resistivity
5. High resistivity, good sulfur resistance
6. Specific gravity less than nickel-chromium alloy, the price is significantly lower than nickel-chromium alloy
7. The disadvantage is that as the temperature rises, the performance of plasticity, low strength at high temperatures
Nickel-chromium furnace wire is characterized by:
1. High strength at high temperatures
2. Long-term use and then cold, the material will not become brittle
3. Fully oxidized nickel-mining alloy has a higher emissivity than iron-chromium-aluminium alloy.
4. Non-magnetic
5. Good corrosion resistance except for sulfur atmosphere
