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Why we choose 4 series stainless steel as substrate of thick film heating tube?

Why we choose 4 series stainless steel as substrate of thick film heating tube?

2019-03-14

Why we choose 4 series stainless steel as substrate of thick film Heating Tube?

Substrate: There are 4 series (ferrite) and 3 series (austenite) as substrate currently. We recommend 4 series. The reasons are as follows: Corrosion resistance: better than 304, equal to 316L. Development for chloride tolerance. Thermal conductivity: 1.3-1.5 times of 3 series, high thermal efficiency. Thermal expansion coefficient: 0.6-0.7 of3 series. It is the most temperature-resistant below 1000 C, and it is not easy to produce deformation leading to water leakage. Density: about 97% of the 3 series, lighter in weight Safety: food grade, meeting ROHS requirements The finished product of 3 series can not pass salt spray test, 4 series can. There is no "good" or "bad" distinction between stainless steel. The cost of 4 series is higher than 304 stainless steel.

thick film heating element



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