Problems related to heat exchanger

For help, a German made heat exchanger, the tube sheet material is CuZn38SnAl, the tube material CuNi10Fe. If the localization, what materials should be used … do or not do God please tell me! Thanks
2016-08-09 Reply
Did not do, I help you ask someone else, do not worry
2016-08-10 09:18:10 Reply
No, I know. Thank you very much
2016-08-10 09:19:59 Reply