4343 brazing aluminum sheet foil coil strip is a hypoeutectic Al-Si alloy with a melting point of 590-610℃, which is higher than the Si content of 4043 aluminum alloy. It has the characteristics of low melting point, narrow solidification range and good fluidity, which is conducive to the shrinkage of the weld during solidification to reduce cracks and is used as cladding layer of composite brazing sheet...
1.The Introduction of 4343 brazing aluminum sheet foil coil strip
4343 brazing aluminum sheet foil coil strip is a hypoeutectic Al-Si alloy with a melting point of 590-610℃, which is higher than the Si content of 4043 aluminum alloy. It has the characteristics of low melting point, narrow solidification range and good fluidity, which is conducive to the shrinkage of the weld during solidification to reduce cracks and is used as cladding layer of composite brazing sheet .Cladding AI-Si alloy can be used as a brazing layer, which plays a role of brazing in brazing, and is a brazing material for connecting cladded pipes, cladded plates and cladded fins.
4343/3003/4343 three-layer aluminum alloy cladded foil is the most typical and most widely used aluminum heat transfer material.
4343 /3003/7072 is a new type of aluminum alloy brazing plate. Compared with the traditional 4343 /3003 /4343, 4045 /3003/4045 and other aluminum alloy brazing plates, 4343 /3003/7072 aluminum alloy brazing plates have better corrosion resistance and brazing performance.
2.The Specification of 4343 brazing aluminum sheet foil coil strip
*Alloy: 4343
*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 4343 brazing aluminum sheet foil coil strip
|
4343 Chemical Composition(%) |
|||||||||
|
Si |
Fe |
Cu |
Mn |
Mg |
Cr |
Zn |
Ti |
Ni |
Alu |
|
6.8--8.2 |
<0.8 |
<0.25 |
<0.10 |
-- |
-- |
<0.20 |
-- |
-- |
Remainder |
4.The Mechanical properties of 4343 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 |
|||||
|
4343 |
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 4343 brazing aluminum sheet foil coil strip
A: It has the characteristics of low melting point, narrow solidification range, and good fluidity, which is conducive to the shrinkage of the weld during solidification to reduce cracks.
B: It has better corrosion resistance and brazing performance.
C: It has better fluidity, wettability, gap filling ability, corrosion resistance and joint strength.
D: The product after brazing is beautiful, and there is no pores, cracks, weld bumps and other phenomena in the welding. The surface of the weld joint is bright and the fillet is even.
6.The Usage of 4343 brazing aluminum sheet foil coil strip
The cladded material with 4343 brazing aluminum sheet foil coil strip
as the cladding layer has the advantages of light weight, corrosion resistance, good brazing performance, and good thermal conductivity. It is widely used in the manufacture of heat exchangers in the fields of automobiles, electronic appliances, chemicals, diesel machinery, etc, such as water tank radiators, evaporators, air-conditioning condensers, heaters, radiators for electrical components, etc.
