[MW:5927] Copper Base alloys

Dear all,

For one of my project, I have to use Sea water for cooling purpose.

For the same customer has suggested following materials for heat exchanger

 

Shell, Channel, Channel cover & Baffles as ASTM B 171 C61400 or ASTM B 171 C63000

 

I never used such type of materials earlier.

 

Can anyone suggest me which option is best option & why?

Also let me know which is costlier ?

 

Thanks

Praphulla