AA4004/AA4104 brazing sheet is a necessary raw material often used in the production process of vacuum brazing process aluminum heat exchanger. The quality of the solder sheet may have a relatively large impact on the pressure resistance and durability of the heat exchanger;...
Introduction of AA4004/AA4104 brazed aluminum sheet
AA4004/AA4104 brazing sheet is a necessary raw material often used in the production process of vacuum brazing process aluminum heat exchanger. The quality of the solder sheet may have a relatively large impact on the pressure resistance and durability of the heat exchanger; specifically, the Mg element will affect the removal of oxide scale on the one hand, and will also affect the melting point of the solder sheet. The addition of Si element is also affects its distribution and aggregation in the solder piece, which affects the melting point of the solder piece.
AA4004/AA4104 brazing plate is an Al-Mn alloy, which is a widely used rust-proof aluminum. Its strength is not high, and it cannot be strengthened by heat treatment. Therefore, cold working methods are often used to improve its mechanical properties; it has high plasticity in the annealed state. It has good plasticity during semi-cold work hardening, low plasticity during cold work hardening, good corrosion resistance, good weldability and poor machinability.
Chemical composition and mechanical properties of AA4004/AA4104 brazed aluminum sheet
|
Chemical Composition(%) |
||||||||||
|
|
Si |
Fe |
Cu |
Mn |
Mg |
Cr |
Zn |
Ti |
Ni |
Alu |
|
AA4004 |
9.0--10.5 |
<0.8 |
<0.25 |
<0.10 |
1.0-2.0 |
-- |
<0.20 |
-- |
-- |
Remainder |
|
AA4104 |
9.0--10.5 |
<0.8 |
<0.25 |
<0.10 |
1.0-2.0 |
-- |
<0.20 |
-- |
0.02-- 0.20 |
Remainder |
|
Alloy |
Temper |
Thickness (mm) |
Mechanical properties |
||
|
Tensile Strength（Mpa） |
Yield strength （Mpa） |
Elongation (%) |
|||
|
standard value |
standard value |
A50 |
|||
|
Not less than |
|||||
|
AA4004 |
O |
0.05-0.5 |
90-140 |
35 |
5 |
|
＞0.5-3.0 |
10 |
||||
|
H14 |
0.05-0.5 |
140-190 |
120 |
1 |
|
|
AA4104 |
O |
0.05-0.5 |
90-140 |
35 |
5 |
|
＞0.5-3.0 |
|
|
10 |
||
|
H14 |
0.05-0.5 |
140-190 |
120 |
1 |
|
The Usage of AA4004/AA4104 brazed aluminum sheet
AA4004/AA4104 brazed aluminum sheet is used as the cladding layer of cladded aluminum sheet plate, which is widely used in various heat exchangers, such as automobile water tank radiators, automobile air conditioning condensers, and evaporators.
