What is PREN

PREN refers to Pitting resistance equivalent number, a measurement of the corrosion resistance of stainless steel containing nickel

Pitting resistance equivalent number (PREN) is a predictive measurement of a stainless steel’s resistance to localized pitting corrosion based on its chemical composition. In general: the higher PREN-value, the more resistant is the stainless steel to localized pitting corrosion by chloride.