Alloy 446 stainless steel is a high chromium ferritic stainless steel commonly used in high temperature applications from 1500 °F to 2200 °F. 446 stainless steel is the most oxidation resistant steel among the 400 series stainless’. Its resistance to cyclic oxidation is equal to or better than 309 and 310 steels, but has lower strength at elevated temperatures.

446 Stainless Steel Composition

446 Stainless Steel Mechanical Properties

Size Specification of 446 Stainless Steel

Applications of 446 Stainless Steel:

Grade 446 stainless steel is mainly used in the manufacturing of industrial equipment and parts in high-temperature environments. It has excellent high-temperature resistance and can maintain good mechanical properties and corrosion resistance at high temperatures. Specific application areas include:

1. Boilers and Heat Exchangers: 446-grade stainless steel can be used to manufacture pipelines, baffles, flanges, and other components of high-temperature and high-pressure boilers and heat exchangers.
2. Gas Burners: 446-grade stainless steel can be used to manufacture burner combustion chambers, nozzles, flame shrouds, and other components.
3. Glass Molds: 446-grade stainless steel can be used to make glass molds because its thermal expansion coefficient at high temperatures is similar to glass, reducing thermal stress between the mold and glass.
4. Furnace Linings and Furnace Accessories: 446-grade stainless steel can be used to make high-temperature furnace linings and furnace accessories, such as annealing boxes, kiln linings, industrial mufflers, etc.

In summary, 446-grade stainless steel has excellent corrosion resistance and heat resistance at high temperatures, making it widely used in the manufacturing of various high-temperature industrial equipment and components.