4004 brazing aluminum sheet foil coil strip as a kind of Al-Si alloy, is used as the cladding layer of cladding aluminum plate and strip foil. It is often rolled together with 3003 aluminum alloy to form an aluminum alloy composite material. 4004 is used as a cladding layer, and the cladding layer melts during vacuum brazing to play a role in brazing....
1.The Introduction of 4004 brazing aluminum sheet foil coil strip
4004 brazing aluminum sheet foil coil strip as a kind of Al-Si alloy, is used as the cladding layer of cladding aluminum plate and strip foil. It is often rolled together with 3003 aluminum alloy to form an aluminum alloy composite material. 4004 is used as a cladding layer, and the cladding layer melts during vacuum brazing to play a role in brazing. The aluminum alloy composite material is widely used in radiators or heat exchangers of automobiles, air conditioners, oxygen generators, and cryogenic equipment. Especially for large-scale heat exchangers used in air separation equipment such as oxygen generators, they need to work under a certain pressure, and the quality requirements for heat exchangers are more stringent,this requires higher requirements for the brazing quality of the heat exchanger during vacuum brazing.
2.The Specification of 4004 brazing aluminum sheet foil coil strip
*Alloy: 4004
*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 4004 brazing aluminum sheet foil coil strip
|
4004 Chemical Composition(%) |
|||||||||
|
Si |
Fe |
Cu |
Mn |
Mg |
Cr |
Zn |
Ti |
Ni |
Alu |
|
9.0--10.5 |
<0.8 |
<0.25 |
<0.10 |
1.0-2.0 |
-- |
<0.20 |
-- |
-- |
Remainder |
4.The Mechanical properties of 4004 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 |
|||||
|
4004
|
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 4004 brazing aluminum sheet foil coil strip
A: It has the characteristics of low density, low thermal expansion coefficient, good volume stability, low melting point, etc.
B: It has high strength and excellent welding performance.
C: It has good wear resistance, heat resistance and high temperature resistance, and has a certain degree of corrosion resistance.
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 4004 brazing aluminum sheet foil coil strip
4004 brazing aluminum sheet foil coil strip is mainly used for brazing sheet materials of aluminum alloys. This brazing sheet materials is widely used in radiators or heat exchangers of automobiles, air conditioners, oxygen generators, and cryogenic equipment.
