Brazing pastes


Project Description
  • 0
  • 23 August 2017

BRAZING PASTES

BRAZING PASTES

small fot 70 1 - 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.

small fot 70 1 - 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.

Copper based pastes

Product
Composition %Melting temp.range
ISO 17672

(PN- EN 1044)
CuOther°C
Cu 0199.90-1085Cu 110Cu 101
Cu 0299.95-1085Cu 102Cu 102
Cu 0399.00-1085Cu 099Cu 103
Cu 0499.901085Cu 141Cu 104
Cu 05ResztaNi 2.5 – 3.5
Bi 0.02 – 0.05
1085 - 1100Cu 186Cu 105
CuSn6946Sn910-1040Cu 922Cu 201
CuSn128812Sn825-990Cu 925Cu 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)
NiCrOther°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-Ni570.91910,1Si1080-1135Ni 650NI 105
L-Ni689-11P875Ni 700NI 106
L-Ni7761410P890Ni 710NI 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.

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