The Si content of 4A43 brazing aluminum sheet foil coil strip is 6.8%-8.2%, which is a hypoeutectic alloy in the aluminum-silicon series.Its Si content is the same as that of 4343 aluminum alloy, but the Zn content is slightly different. It has higher Si content than 4043 aluminum alloy, and has the characteristics of low melting point and good fluidity. In addition, it also has the characteristics of small cladding interface diffusion layer, good sag resistance and excellent corrosion resistance....
1.The Introduction of 4A43 brazing aluminum sheet foil coil strip
The Si content of 4A43 brazing aluminum sheet foil coil strip is 6.8%-8.2%, which is a hypoeutectic alloy in the aluminum-silicon series.
Its Si content is the same as that of 4343 aluminum alloy, but the Zn content is slightly different. It has higher Si content than 4043 aluminum alloy, and has the characteristics of low melting point and good fluidity. In addition, it also has the characteristics of small cladding interface diffusion layer, good sag resistance and excellent corrosion resistance.
It is often used as a cladding layer for aluminum heat transfer materials and as a brazing material for cladding plates and cladding fins.
Its typical brazing alloy combination is 4A43/3003/4A43, 4A43/3003/7072.
2.The Specification of 4A43 brazing aluminum sheet foil coil strip
*Alloy: 4A43
*Temper: O,H12,H22,H14,H24,H16,H26,H18,F,H112 etc
*Thickness: 0.05mm~6mm
*Sheet width: 450mm -2200mm; coil width: 5mm-2200mm
*Length: 500-15000mm or Coiled, coil outer diameter: Max 2500mm
*Delivery shape: aluminum foil: 0.05mm~0.20mm; plate shape; Coil shape; Strip shape
*Inner diameter of coils: 75mm, 76mm, 150mm, 152mm, 200mm, 250mm, 300mm, 405mm, 505mm
Paper core or aluminum core, outer diameter according to customer requirements.
3.The Chemical composition of 4A43 brazing aluminum sheet foil coil strip
|
4A43 Chemical Composition(%) |
|||||||||
|
Si |
Fe |
Cu |
Mn |
Mg |
Cr |
Zn |
Ti |
Ni |
Alu |
|
6.8--8.2 |
<0.8 |
<0.25 |
<0.10 |
-- |
-- |
0.50--1.5 |
-- |
-- |
Remainder |
4.The Mechanical properties of 4A43 brazing aluminum sheet foil coil strip
|
Alloy |
Temper |
Thickness (mm) |
Mechanical properties |
||
|
Tensile Strength（Mpa） |
Yield strength （Mpa） |
Elongation (%) |
|||
|
standard value |
standard value |
A50 |
|||
|
Not less than |
|||||
|
4A43 |
O |
0.05-0.5 |
90-140 |
35 |
5 |
|
＞0.5-3.0 |
10 |
||||
|
H12 H22 |
0.05-0.5 |
120-170 |
100 |
2 |
|
|
＞0.5-3.0 |
3 |
||||
|
H14 H24 |
0.05-0.5 |
140-190 |
120 |
1 |
|
|
＞0.5-3.0 |
1 |
||||
|
H16 H26 |
0.05-0.5 |
160-210 |
140 |
0.5 |
|
|
＞0.5-3.0 |
1 |
||||
|
H18 |
0.05-0.5 |
180 |
160 |
0.2 |
|
|
＞0.5-3.0 |
1 |
||||
5.The Performance advantages of 4A43 brazing aluminum sheet foil coil strip
A: The alloy has the characteristics of low melting point and good fluidity.
B: The alloy also has the characteristics of small composite interface diffusion layer, good sag resistance and excellent corrosion resistance.
C: The aluminum heat transfer material produced with this alloy has the characteristics of high yield and high production efficiency.
D: The aluminum heat transfer material produced with this alloy makes it possible to further thin the composite material.
6.The Usage of 4A43 brazing aluminum sheet foil coil strip
4A43 brazing aluminum sheet foil coil strip is often used as the cladding layer of aluminum heat transfer materials, as the brazing material for cladding plates and cladding fins. It is widely used in the manufacture of heat exchangers in automobiles, electronic appliances, chemicals, diesel machinery and other fields, such as water tank radiators, evaporators, air-conditioning condensers, heaters, electrical components radiators, etc.
