Trimetals strips consist of two layers of silver brazing alloy clad into a copper core and are very popular for brazing of carbides into steel especially large pieces.
The copper core of the strip absorbs & relieves the stresses caused by the difference in thermal expansion between carbide and base metal, thus helping to prevent cracking.
Higher joint tensile strength performances are obtainable with Ag49MnNi/1 TR TOP, thanks to its modified copper central core.
For very large carbide pieces or very hard carbide types, Ag49MnNi/1 TR 161, with higher copper percentage is advised for the maximum reduction of internal stresses.

Trimetal / Sandwich Foils