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Corrosion Resistance - PREN Values

Pitting Corrosion Resistance

The Pitting Resistance Equivalence Number, PREN, is a measure of relative pitting corrosion resistance of stainless steel in a chloride-containing environment.

Higher PREN values indicate greater corrosion resistance.

The Ferritic & Austenitic SS grade formula for PREN is: PREN = %Cr + 3.3 x %Mo + 16 x %N

The Duplex SS grade formula for PREN is: PREN = %Cr + 3.3 x %Mo + 30 x %N

Stainless Pren Values

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