BRAZING PASTES
BRAZING PASTES
Brazing paste consists of metal powder and an appropriate binding system. Additionally, depending on the type of application flux may be added to the paste. Pastes are used in situations where the use of traditional shape in wire or tape form is not feasible due to the complex shape of brazed elements. Pastes are predominantly used in furnace, induction or automated flame brazing processes.
Brazing paste consists of metal powder and an appropriate binding system. Additionally, depending on the type of application flux may be added to the paste. Pastes are used in situations where the use of traditional shape in wire or tape form is not feasible due to the complex shape of brazed elements. Pastes are predominantly used in furnace, induction or automated flame brazing processes.
| Copper based pastes | |||||
|---|---|---|---|---|---|
Product | Composition % | Melting temp.range | ISO 17672 | (PN- EN 1044) |
|
| Cu | Other | °C | |||
| Cu 01 | 99.90 | - | 1085 | Cu 110 | Cu 101 |
| Cu 02 | 99.95 | - | 1085 | Cu 102 | Cu 102 |
| Cu 03 | 99.00 | - | 1085 | Cu 099 | Cu 103 |
| Cu 04 | 99.90 | 1085 | Cu 141 | Cu 104 | |
| Cu 05 | Reszta | Ni 2.5 – 3.5 Bi 0.02 – 0.05 | 1085 - 1100 | Cu 186 | Cu 105 |
| CuSn6 | 94 | 6Sn | 910-1040 | Cu 922 | Cu 201 |
| CuSn12 | 88 | 12Sn | 825-990 | Cu 925 | Cu 202 |
Types of pastes
We offers various pastes adapted to the particular application, furnace atmosphere and brazing process characteristics. LUT-SPAW pastes do not leave residues after the brazing process, do not spatter during heating up and exhibit high adhesion.
GS type – Copper based paste on copper powder obtained by a process of gas atomization. Intended for brazing in furnaces with a protective N₂ / H₂ atmosphere achieved as a result of methane or propane decomposition.
WT type – Copper based paste on copper powder obtained as a result of water atomization. Intended for brazing in furnaces with a protective N₂ / H₂ atmosphere achieved as a result of methane or propane decomposition.
PW type – Copper paste intended for use in vacuum or pure H₂ brazing
Types of binders
We manufacture binders in accordance with the requirements defined by our customers. They are available for the following application methods:
D type – binder intended for pastes applied by hand or automatically
SP type – binder intended for pastes applied by the screen printing method.
| Nickel based pastes | ||||||
|---|---|---|---|---|---|---|
Product | Composition % | Melting temp.range | ISO 17672 | (PN- EN 1044) |
||
| Ni | Cr | Other | °C | |||
L-Ni-1a | 76 | 14 | 4.5Si 3.1B 4.5Fe | 980-1070 | Ni 610 | NI 1A1 |
L-Ni2 | 82.4 | 7 | 3Fe 4.5Si 3.1B | 970-1000 | Ni 620 | Ni 102 |
| L-Ni5 | 70.9 | 19 | 10,1Si | 1080-1135 | Ni 650 | NI 105 |
| L-Ni6 | 89 | - | 11P | 875 | Ni 700 | NI 106 |
| L-Ni7 | 76 | 14 | 10P | 890 | Ni 710 | NI 107 |
Types of binders
We manufacture binders in accordance with the requirements defined by our customers. They are available for the following application methods:
D type – binder intended for pastes applied by hand or automatically
SP type – binder intended for pastes applied by the screen printing method.
P type – binder intended for pastes applied by spraying
R type – binder intended for pastes applied to a surface using a roller
Apart from the high-temperature pastes LUT-SPAW also offers other pastes based on the following alloys:
- Brazing pastes based on alloys containing silver
- Brazing pastes based on copper alloys containing phosphorus
- Brazing pastes based on aluminium alloys
- Brazing pastes based on tin alloys
There is a possibility to prepare pastes in accordance with the customer’s requirements, by defining the metal powder grain size, percentage metal powder contents as well as the binding system, which will be adapted to the paste application method.
If you have any questions or queries please do not hesitate to contact us.
