Where C19400 is not the right choice

Being clear about the limits usually saves more money than promoting the strengths:

• Busbars and high-current conductors — if the design needs 90% IACS or better, use C11000 or C10200 instead.
• High-force springs and long-cycle contacts — C17200 beryllium copper or C5191 phosphor bronze deliver higher elastic limits and better stress relaxation.
• Continuous service above about 200°C — the dispersion structure is stable for short excursions, but sustained high temperature under load calls for a different alloy family.
• Seawater and aggressive chloride environments — copper-nickel grades are the appropriate choice.