Grade 321 is a brilliant option when using in high temperature environments of up to 900 degree celcius. Stainless steel 321/321H mostly used in manufacturing heat exchangers, pressure vessels, pharmaceuticals and chemical processing equipments. Stainless steel 321 pipes refer to as UNS S32100 and SS 321H pipes is refered to as UNS S32109 and both are available in both seamless and welded form in various sizes. Stainless Steel 321/321H seamless & welded pipes and tubes can be offered in random lengths, varied types and various forms.