CARBIDE BRAZING ALLOYS – TRIMETALS

Trimetals strips consist of two layers of silver brazing alloy clad onto a copper core and are very popular for brazing of carbides onto steel, especially large pieces.
The copper core of the strip absorbs and relieves the stresses caused by the difference in thermal expansion between carbide and base metal, thus helping to prevent cracking.
Higher joint tensile strenghth 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.

Code Composition % (external layers) Melting Range SOL-LIQ Density Description Pdf
Ag Cu Zn Ni Mn °C g/cm3

Sandwich Brazing Alloys

Ag49MnNi/1 TR 49 27,5 20,5 0,5 2,5 670-690 9,0 Copper core – Ratio 1:2:1
Ag49MnNi/1 TR TOP 49 27,5 20,5 0,5 2,5 670-690 9,0 Modified Copper Core – Ratio 1:2:1
Ag49MnNi/1 TR 161 49 27,5 20,5 0,5 2,5 670-690 9,0 Copper core – Ratio 1:6:1
Ag49MnNi/1 TR 111 49 27,5 20,5 0,5 2,5 670-690 9,0 Copper core – Ratio 1:1:1
Ag40Ni TR 40 30 28 2 670-780 8,9 Copper core – Ratio 1:2:1
Ag38MnNi TR 38 26 24 4,5 7,5 650-690 8,9 Copper core – Ratio 1:2:1

Make-up
Strips Thickness: 0,1
÷
1 mm
Width: 1,3 → 80 mm
Preforms from Strip

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