2.5mm Silver Copper Eutectic Alloy Ag72Cu28 Brazing Wire
Silver-based brazing filler metal is currently the longest and most
widely used brazing filler metal in solders. Due to its suitable
melting point, good electrical conductivity, high strength and
plasticity, good processing performance, and corrosion resistance
in the medium Also better.
Ag72Cu28 is widely used as a filler material for the brazing of
electric vacuum devices. It is used for brazing low-carbon steel,
stainless steel, high-temperature alloys, molybdenum, nickel,
copper and their alloys, Kovar and refractory alloys.
Equivalent for Ag72Cu28:
GB/T 10046-2008: BAg72Cu
DIN EN 1044:AG 401
DIN 8513: L-Ag72
EN ISO 3677: B-Ag72Cu-780
AWS A 5.8:BAg-8
Features:
-Eutectic brazing wire, melting point is 780℃
-Good wetting performance
-Good electrical and thermal conductivity
-Excellent mechanical properties
-Corrosion resistance, high reliability of welded joints
-The most widely used solder for electric vacuum devices.
1. Chemical composition(%)
| Grade | Ag | Cu | S | P | S | As | Au | Fe |
| Ag72Cu28 | Bal | 27.5-28.2 | <0.002 | <0.001 | / | / | / | / |
2. Physical properties
Grade |
Density(g/cm3) | Melting temperature(℃) | Curie point(℃) | Volume resistivity(μΩ.cm) | Thermal conductivity(W/m. ℃) |
| Ag72Cu28 | 10.05 | 779-780 | / | / | / |
3. Mechnical properties
FORM |
Yield Strength(Mpa) |
Tensile Strength(Mpa) |
Elongation in 2 in. (%) |
Hardness(RB) |
Strip | Hard | / | / | / | / |
| Annealed | / | / | / | / |
Wire | Annealed | / | / | / | / |
| No.1 Temper | / | / | / | / |
| Spring Temper | / | / | / | / |
