|
National
Code
|
Essential Components(%)
|
Melting
Temperature
(℃)
|
Intensity
of tension
(/Mpa)
|
Features and Application
|
||
|
Ag
|
Cu
|
Zn
|
||||
|
BAg10CuZn
(HL301)
|
9-11
|
52-54
|
Remainder
|
815-850
|
451
|
Good price, but with higher brazing temperature, and worse joint plasticity, suitable for lower requirement such as copper and copper ally etc
|
|
BAg15CuZn
|
14-16
|
46-48
|
Remainder
|
787-808
|
|
|
|
BAg25CuZn
(HL302)
|
24-26
|
40-42
|
Remainder
|
700-800
|
353
|
Higher brazing temperature, but with good wettability and capacity of filling joints, suitable for brazing of copper, hard carbide and steel etc
|
|
BAg45CuZn
(HL303)
|
44-46
|
29-31
|
Remainder
|
665-745
|
386
|
Low melding point, with good wettability and capacity of filling joints and high strength of joints, which can bear a certain shaking load
|
|
BAg50CuZn
(HL304)
|
49-51
|
33-35
|
Remainder
|
680-775
|
343
|
Good overflow and capacity of filling joints and plasticity, high strength of joint, suitable for brazing of copper ,copper alloy and stainless steel
|
|
BAg650CuZn
(HL306)
|
64-66
|
19-21
|
Remainder
|
685-720
|
384
|
Lower melting point, good plasticity, fluidity and strength for joints, and smooth joint surface, suitable for the condition with high brazing requirements such as copper and copper alloy, steel and stainless steel, often used for brazing in food vessels and wave guide
|
|
BAg70CuZn
(HL307)
|
69-71
|
25-27
|
Remainder
|
730-755
|
353
|
With high joint strength and good plasticity and electric conductivity, suitable for brazing of brass, copper and silver
|
|
BAg72Cu
(HL308)
|
71-73
|
Remainder
|
-
|
779
|
375
|
High silver content, with good wettability, tractility, and brazing features, high electric conductivity, the brazing metal does not contain volatile element, and temperature interval in crystallizing
|
|
Remark:
1. The residue such as grease, oxide etc on the surface and connection must be removed strictly before the brazing, the proper clearance between joints shall be 0.03-0.075mm.
2. The flame shall be neutral in brazing to avoid the brittleness resulting from overheating and over-burning, and brazing flux shall be also used.
|
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