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A series of excellent properties of aluminium alloy and lightweight of automobile can make Clad brazing aluminium foil technology widely applied in automotive heat exchanger. The automobile radiator uses a Clad brazing aluminium foil instead of copper foil, which can reduce weight by 40%.
1.Signi Aluminium Chemical composition of Clad brazing aluminium foil
| Signi Aluminium Chemical composition | |||||||||||
| SIGNI ALUMINIUM CLAD ALLOYS | Others | ||||||||||
| Alloy | Si | Fe | Cu | Mn | Mg | Cr | Zn | Ti | each | total | |
| Clad alloys for VCA-brazing according to EN573-3 | |||||||||||
| 4004 |
Min. max. |
9.0 10.5 |
- 0.8 |
- 0.25 |
- 0.10 |
1.0 2.0 |
- - |
- 0.20 |
- - |
- 0.05 |
- 0.15 |
| 4104(Containing0.02%-0.20% Bi) |
Min. max. |
9.0 10.5 |
- 0.8 |
- 0.25 |
- 0.10 |
1.0 2.0 |
- - |
- 0.20 |
- - |
- 0.05 |
- 0.15 |
| Clay alloys for CAB-brazing according to EN573-3 | |||||||||||
| 4343 |
Min. max. |
6.8 8.2 |
- 0.8 |
- 0.25 |
- 0.10 |
- - |
- - |
- 0.20 |
- - |
- 0.05 |
- 0.15 |
| 4045 |
Min. max. |
9.0 11.0 |
- 0.8 |
- 0.30 |
- 0.05 |
- 0.05 |
- - |
- 0.10 |
- 0.20 |
- 0.05 |
- 0.15 |
| 4047A |
Min. max. |
11.0 13.0 |
- 0.6 |
- 0.30 |
- 0.15 |
- 0.10 |
- - |
- 0.20 |
- 0.15 |
- 0.05 |
- 0.15 |
| Zn-containing clad alloys for CAB-brazing | |||||||||||
| 4343.ZN |
Min. max. |
6.8 8.2 |
- 0.8 |
- 0.25 |
- 0.10 |
- - |
- - |
0.8 1.2 |
- - |
- 0.05 |
- 0.15 |
| 4045.ZN |
Min. max. |
9.0 11.0 |
- 0.8 |
- 0.30 |
- 0.05 |
- 0.05 |
- - |
0.8 1.2 |
- 0.20 |
- 0.05 |
- 0.15 |
| Clad alloys for corrosion protection according to EN573-3 | |||||||||||
| 1050A |
Min. max. |
- 0.25 |
- 0.40 |
- 0.05 |
- 0.05 |
- 0.05 |
- - |
- 0.07 |
- 0.05 |
- 0.03 |
- - |
| 7072 |
Min. Max. |
- 0.7(Si+Fe) |
- 0.10 |
- 0.10 |
- 0.10 |
- - |
0.8 1.3 |
- - |
- 0.05 |
- 0.15 |
|
| All data in Wt.-%; Customer specific alloy composition on request. | |||||||||||
| 3××× alloys according to EN573-3 and ASTM | |||||||||||
| 3003 |
Min. max. |
- 0.6 |
- 0.7 |
0.05 0.25 |
1.0 1.5 |
- - |
- - |
- 0.10 |
- - |
- 0.05 |
- 0.15 |
| 3004 |
Min. max. |
- 0.30 |
- 0.70 |
- 0.25 |
1.0 1.5 |
0.8 1.3 |
- - |
= 0.25 |
- - |
- 0.05 |
- 0.15 |
| 3005 |
Min. max. |
- 0.6 |
- 0.70 |
- 0.30 |
1.0 1.5 |
0.20 0.6 |
- 0.10 |
- 0.25 |
- 0.10 |
- 0.05 |
- 0.15 |
| 3103Containingmax.0.10%(Zr+Ti) |
Min. Max. |
- 0.50 |
- 0.70 |
- 0.10 |
0.9 1.5 |
- 0.30 |
- 0.10 |
- 0.20 |
- - |
- 0.05 |
- 0.15 |
| 3105 |
Min. Max. |
- 0.6 |
- 0.7 |
- 0.30 |
0.30 0.80 |
0.20 0.80 |
- 0.20 |
- 0.40 |
- 0.10 |
- 0.05 |
- 0.15 |
| 5×××-non-heat-treatable alloys according to EN573-3 | |||||||||||
| 5049 |
Min. max. |
- 0.40 |
- 0.50 |
- 0.10 |
0.50 1.10 |
1.60 2.50 |
- 0.30 |
- 0.20 |
- 0.10 |
- 0.05 |
- 0.15 |
| 5052 |
Min. max. |
- 0.25 |
- 0.40 |
- 0.10 |
- 0.10 |
2.2 2.8 |
0.15 0.35 |
- 0.10 |
- - |
- 0.05 |
- 0.15 |
| 5083 |
Min. max. |
- 0.40 |
- 0.40 |
- 0.10 |
0.40 1.0 |
4.0 4.9 |
0.05 0.25 |
- 0.25 |
- 0.15 |
- 0.05 |
- 0.15 |
| 6×××-non-heat-treatable alloys according to EN573-3 | |||||||||||
| 6063 |
Min. max. |
0.20 0.60 |
- 0.35 |
- 0.10 |
- 0.10 |
0.45 0.90 |
- 0.10 |
- 0.10 |
- - |
- 0.05 |
- 0.15 |
| 6951 |
Min max. |
0.20 0.50 |
- 0.08 |
0.15 0.40 |
- 0.10 |
0.40 0.8 |
- - |
- 0.20 |
- - |
- 0.05 |
- 0.15 |
| 7×××-non-heat-treatable alloys according to EN573-3 | |||||||||||
|
7020 Containing 0.08%-0.25% (Zr+Ti) and 0.08%--0.20% Zr |
Min. max. |
- 0.35 |
- 0.40 |
- 0.20 |
0.05 0.50 |
1.0 1.4 |
0.10 0.35 |
4.0 5.0 |
- - |
- 0.05 |
- 0.15 |
|
Signi Aluminium Physical Property Data of Clad brazing aluminium foil |
||||||||
|
Alloy |
Temper |
Thickness (mm) |
Tolerance (mm) |
Clad Ratio (%) |
Tensile Strength (MPa) |
Yield Strength (MPa) |
Elongation (%) Min |
Application |
| 3003 | H14 | 0.08~0.12 | ±0.005 | None | 150~200 | ≥120 | 1 | Evaporator fin and plate |
| 3003 | H14 | 0.06~0.1 | ±0.005 | None | 150~200 | ≥120 | 1 | Radiator fin and plate |
| 4343/3003/4343 | H14 | 0.06~0.1 | ±0.005 | 8~12 | 150~200 | ≥120 | 1 | |
| 4343/3003/4343 | H14 | 0.08~0.12 | ±0.005 | 8~12 | 150~200 | ≥120 | 1 | Parallel condenser fin |
| 4343/3003/4343 | H14 | 0.1~0.12 | ±0.005 | 8~12 | 150~120 | ≥120 | 1 | Charge air cooler material |
| 4045/3003/4045 | H14 | 0.1~0.12 | ±0.005 | 8~12 | 150~200 | ≥120 | 1 | |
| 4047 | H18 | 0.05~0.1 | ±0.005 | None | ≥200 | ≥170 | 0.5 | Aluminium for heating element |
| 7072 | H19 | 0.12~0.15 | ±0.005 | None | 145~172 | ≥15 | 0.5 | Fin stock |
| 4A13 | H18 | 0.05~0.1 | ±0.005 | None | ≥190 | ≥16 | 0.5 | Aluminium for heating element |
| 4104 | H18 | 0.05~0.1 | ±0.005 | None | ≥220 | ≥190 | 0.5 | |
|
3003 (external fin) |
H14 | 0.1~0.15 | ±0.005 | None | 150~200 | ≥120 | 1 |
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