Stainless Steel 321h Seamless, Welded, Erw, Efw Pipes And Tubes Manufacturer, Suppliers, Stockist, Exporter

As a general-purpose austenitic stainless steel, 321H Pipe is stabilized against carbide precipitation and designed for use within the carbide precipitation temperature range of 427 to 816°C (800 to 1500°F). 

When annealed, it is non-magnetic and can only be hardened by cold working. By adding titanium to the alloy’s composition, chromium carbide precipitation at grain boundaries is suppressed and intergranular corrosion is reduced.

The 321H stainless steel pipe has a higher carbon content (0.04 – 0.10). Developed for enhanced creep resistance and higher strength at temperatures above 1000°F (537°C). Dual certification is typically enabled by the carbon content of the pipe.

In the carbide precipitation range of 425-8500C, grades 321H are not sensitive to intergranular corrosion. For applications up to about 9000C, grade 321 offers high strength, resistance to scaling, phase stability, and resistance to subsequent aqueous corrosion.

An improved high-temperature strength is provided by grade 321H, a modification of grade 321 with a higher carbon content.

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