How to choose the material of dry-burning electric heating tube

A customer bought a dry-burning electric heater at a hardware store. It had an operating temperature of 500°C and was made of 304 stainless steel. It burned out after a short time. Thinking he'd overpriced it, he bought a lower-wattage model, but it broke again after just a few days. He contacted us for advice. Based on the specifications he provided, we analyzed the problem and found that he had chosen the wrong material for the dry-burning heater. So, let's take a look at how to choose the right material for a dry-burning heater.

Liquid heaters are selected based on the properties of the liquid being heated, while dry-burn heaters are selected based on their operating temperature.

For testing purposes, carbon steel can be used, especially for non-long-term use.

For operating temperatures between 100-300°C, 304 stainless steel is recommended.

For operating temperatures between 400-500°C, 321 stainless steel is recommended.

For operating temperatures between 600-700°C, 310S stainless steel is recommended.

For operating temperatures around 700-800°C, imported Inglai materials are recommended. From the above, we can see that this customer's dry-burning electric heating tube with an operating temperature of 500 degrees should be made of stainless steel 321. However, he used stainless steel 304, which would easily burn the dry-burning electric heating tube. Therefore, it is important to tell our customers that choosing the right material is important when ordering dry-burning electric heating tubes.