The classic marine condenser alloy family — see the grade table below for full datasheets and equivalents within this family.
See All Grades ↓Copper-nickel alloys have the longest service track record of any material in seawater condenser applications, offering good biofouling resistance and general corrosion resistance at a lower cost than titanium or duplex steel. The family is defined by nickel content — 90/10 is the economical default for general seawater cooling, while 70/30 adds nickel for better erosion-corrosion resistance at higher flow velocities and more severe biofouling conditions.
Yes, for the large majority of standard seawater and brackish cooling water systems at moderate flow velocity, 90/10 provides adequate resistance at lower cost than 70/30.
When flow velocity is high enough to risk erosion-corrosion on 90/10, or where biofouling conditions are unusually severe.
Copper-nickel is generally more economical with a longer track record, while titanium offers better resistance at very high velocities and is significantly lighter — the choice often comes down to budget and specific velocity/weight requirements.
Every enquiry is checked against governing code, material compatibility and manufacturing feasibility before a quote is issued. Use our product, material, grade and standards guides to freeze the RFQ — then confirm with engineering.
Send your fluid composition and temperature — our engineering team will confirm the right grade.
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