SS 321 Sheets continues to be employed for prolonged service in the 800 Degree F to 1500 Degree F (427 Degree C to 816 Degree C) temperature range. Slightly tougher than other alloys, SS 321 Plates will produce the same tough stringy chips. A preheating is not necessary for SS 321 Coils, where a heat treatment after welding is normally not usual. 321 Stainless Steel Sheets has good creep strength up to 1500 Degree F, along with good resistance to inter-granular corrosion in the as welded condition.

Alloy 321 (UNS S32100) is stabilized stainless steel plate which offers as its main advantage an excellent resistance to intergranular corrosion following exposure to temperatures in the chromium carbide precipitation range from 800 to 1500°F (427 to 816°C). Alloy 321 stainless steel plate is stabilized against chromium carbide formation by the addition of titanium.