NPRO India

Duplex vs
Super Duplex

Attribute
2205
2507
PREN (approx.)
~35
~42+
Chloride / brine
Moderate–high
Aggressive / hot brine
Strength
High
Higher
Cost
Baseline duplex
Significant premium
Pages
2205
2507
Verdict: Use 2507 when temperature and chloride together exceed 2205’s comfort zone — especially concentrated brine. Otherwise 2205 usually wins on value.
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