The Main Material Of Rolled Finned Stainless Steel Tubes

The main materials for rolled finned stainless steel tubes include 304, 316L, and 321 stainless steel grades, with 304 and 316L being the most commonly used.

These materials are the preferred choice for industrial heat exchange equipment due to their excellent corrosion resistance, high temperature resistance, and mechanical strength.

1.304 Stainless Steel: General-purpose corrosion-resistant material. Contains 18% chromium and 8% nickel, possessing excellent resistance to oxidation and general corrosion.

Suitable for temperatures ≤600℃ and environments with weakly corrosive or non-corrosive media, such as air, water, and steam.

Low cost, it is the mainstream choice for general-purpose wound-finned tubes, widely used in food processing, air conditioning systems, and other fields.

2. 316L Stainless Steel: For highly corrosive environments. With the addition of 2%-3% molybdenum to 304, its resistance to chloride ion pitting and crevice corrosion is significantly improved.

It can withstand highly corrosive media such as seawater, industrial wastewater, and acid/alkali solutions, with a maximum temperature resistance of 800℃.

Widely used in harsh environments such as marine engineering, chemical plants, and coastal heat exchange stations.

3.321 Stainless Steel: Outstanding High-Temperature Stability. Titanium is added to stabilize the carbon structure and prevent intergranular corrosion at high temperatures.

It exhibits excellent high-temperature resistance, allowing for long-term operation at ≤900℃, making it suitable for metallurgical and power applications such as boiler flue gas and high-temperature hot air.