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Location:Home » Products » Silver Base Solder
Ag72Cu28

 Features:                                   


-Eutectic solder, melting point is 780℃

- Good wettability

- Good electrical and thermal conductivity

- Excellent mechanical properties

- Corrosion resistance, high reliability of welded joints

- Widely used solder for electric vacuum devices




Description  


Silver-based brazing filler metal is currently the longest and most widely used brazing filler metal. Due to its suitable melting point, good conductivity, high strength and plasticity, good processability, and good corrosion resistance in the medium, eutectic ag72cu28 alloy solder not only has excellent process properties, such as suitable melting point, good wetting, strong seam filling ability, etc, Moreover, the brazing quality is high, and the brazing joint with high strength, excellent conductivity and corrosion resistance can be formed. It is widely used in the production of electric vacuum devices.

As a filling material, Ag72Cu28 is widely used in the brazing of electric vacuum devices, for brazing low carbon steel, stainless steel, superalloy, molybdenum, nickel, copper and its alloys, Kovar alloys and refractory alloys.

Solder composition and performance:   


 Solder composition:

Element

Wt%

Ag

Element

Cu

28±1

Physical properties:

Product name

Melting point/℃

Solid phase/liquid phase


Density
g/cm^3


Ensity
g/cm^3

Resistivity
W/m·K


Thermal expansion coefficient
10-6/℃ 


Tensile strengthMpa


Ag72Cu28

780

10.00 

/

352

17.8

250~360

Operation details:     


- Solder taking:

   Use anti-static fixture to take solder to prevent solder pollution and deformation.


Processing size:



Thickness(t)

Typical tolerance of length/width/diameter (L/W/D)

t<0.40mm

±0.02mm

0.40mm≤ t<1.00mm

±0.03mm

 t ≥1.00mm

±0.05mm

Thickness(t)

Typical tolerance of thickness


Conventional solder alloys

Indium alloys

t<0.05mm

±0.005mm

±0.01mm

0.05mm≤ t<0.10mm

±0.008mm

±0.01mm

0.10mm≤ t<0.20mm

±0.01mm

0.20mm≤ t<0.40mm

±0.02mm

0.40mm≤ t<1.00mm

±0.03mm

 t ≥1.00mm

±5%

Storage and product management:            


- Storage

   The best storage temperature of the product is 25 ± 5 ℃, and the relative humidity is ≤ 55% RH.

- Product management

   Keep the container sealed when the product is not in use.

Safety:  


- Please use this product with sufficient ventilation and certain personal protection.

- Please do not mix with other toxic chemicals.

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