321 -321H Stainless Steel

321/ 321H Stainless Steel Plate

A 300 series stainless steel less sensitive and more suited to elevated temperature environments (up to 900°C) when compared against the more standard austenitic grades (304/316). 321/321H has increased resistance to scaling and intergranular corrosion (versus 304/316 material) due mainly to its added titanium content.

When comparing the chemical structure of 321/321H against standard austenitic grades such as 304/316 the main separating factor is the Titanium content, which is used as a stabalising element allowing the material to operate at a higher temperature range. The amount of titanium content required in 321/321H is indicative of the product percentage of carbon (Ti = 5 x C%).

The only differential between 321 & 321H is a higher carbon content (321H, 0.05% versus 0.04%), the increased addition of carbon in 321H allows for a greater creep resistance and higher strength performance in elevated temperature environments (above 530°C).

Our stock range for 321/321H consists of material available from 6mm to 50mm thick and plate sizes up to and including 12m in length and 2.5m in width