Soldering Preforms
Tin-based alloy parts for specific applications
Preforms are tin-based alloy parts that are made to measure for specific applications. They can take the form of squares, rectangles, washers, collars, rings or sleeves. They may also feature an internal or external flux whose activation depends on the application. They enable the creation of soldered joints where the quantity of the alloy is perfectly measured.
Receive the brochure in PDF
Presentation
Characteristics
Applications
Implantation
Precautions of use
They are used in areas such as semi-conductors, aeronautics, the automotive industry and electronic and mechanic assemblies. They complement the METACONCEPT Group’s tin-based cream or tin-silver cream and solid or cored wire. Waste originating from the use of these products can be recycled.Contact our recycling department to find out more. Preforms are used as part of manual or fully automated processes.
Have you defined the type of application ? Contact us. Our technical staff will be happy to assist you in choosing the most suitable preform.
The table below shows the most commonly used alloys in soft soldering with different types of flux.
ALLOYS
|
EN 29453 classification
|
Density g/cm3
|
Solidus – Liquidus
|
Comments
|
Packaging
|
|---|---|---|---|---|
|
Sn5 – Ag2 – Pb93
|
11,13
|
296°C – 301°C
|
N/A
|
Bulk
|
|
Sn40 – Pb60
|
9,72
|
183°C – 235°C
|
N/A
|
Bulk
|
|
Sn50 – Pb50
|
9,32
|
183°C – 215°C
|
N/A
|
Bulk
|
|
Sn60 – Pb40
|
8,91
|
183°C – 190°C
|
N/A
|
Bulk
|
|
Sn62 – Pb36 – Ag2
|
8,81
|
178°C
|
N/A
|
Bulk
|
|
Sn63 – Pb37
|
8,79
|
183°C
|
N/A
|
Bulk
|
|
Sn48 – In52
|
7,29
|
118°C
|
Lead-free alloy*
|
Bulk
|
|
Sn96 – Ag4
|
7,39
|
221°C
|
Lead-free alloy*
|
Bulk
|
|
SAC 305
|
7,38
|
217°C – 219°C
|
Lead-free alloy*
|
Bulk
|
|
SAC 307
|
7,39
|
217°C – 228°C
|
Lead-free alloy*
|
Bulk
|
|
Sn97 – Cu3
|
7,33
|
230°C – 250°C
|
Lead-free alloy*
|
Bulk
|
|
Sn99 – Cu1
|
7,3
|
230°C – 240°C
|
Lead-free alloy*
|
Bulk
|
|
Sn100
|
7,28
|
232°C
|
Lead-free alloy*
|
Bulk
|
(*) Lead-free alloys – European standard no. 2000 / 53 / CE
The METACONCEPT Group can look into creating any type of alloy upon request. Alloys: tin-indium, tin-bismuth, low melting temperature alloy. Please do not hesitate to contact us.
FLUX
|
Type
|
Nature
|
JSTD-004 Classification
|
Acidity level (mg KOH/g)
|
Halogen rate
|
Residue removal
|
|---|---|---|---|---|---|
|
MRS2
|
Resin
|
ROM1
|
175
|
1,3
|
Clean with a solvent
|
|
MRS7
|
Resin
|
ROM1
|
220
|
1
|
Clean with a solvent
|
|
MSP7
|
Organic
|
ROM1
|
130
|
1,1
|
Clean with a solvent
|
|
MSP15
|
Resin
|
ROLO
|
386
|
0
|
Clean with a solvent
|
Comments: Always use an appropriate flux.Contact our technical department to ascertain which product is most suited to your application.
When the process allows, the advantages of using preforms are as follows:
|
Advantages
|
Results
|
|---|---|
|
Exact quantity of alloy applied
|
Improves the quality and the finish; saves alloy
|
|
Machineable
|
Reduces costs and non-compliance
|
|
Flush joints
|
Simplifies the assembly process
|
|
High % of correct joints
|
Reduces quality tests
|
|
Available in a pre-fluxed version
|
Eliminates the need for an external flux
|
|
Measurement of the % of the flux
|
Reduces residues after brazing
|
Preforms can be used in all brazing applications where the quantity of alloy must be very closely controlled. Preforms may also be used to create tin-based fusible parts with a low melting temperature.
Fields of application
- Automotive industry
- Heat exchangers
- Aeronautics
- Spatial
- Connectivity
- Semi-conductors
- Fire safety
- Various electronic and mechanical assemblies
The product safety information sheet below is available upon request from the METACONCEPT Group.
The effective use of preforms demands a rigorous and faithful implementation. Contact the METACONCEPT Group’s technical department who, after selection of the alloy and its form, will provide the appropriate implementation sheet.
To prevent burns caused by the molten metal, it is advisable to wear a protective apron, shoes, gloves, helmet and glasses.
- Do not smoke at the workstation.
- The workstation must be well ventilated.
- Wash your hands when leaving the workstation.
Comments :
Always use a flux suited to the intended use. Contact our technical department to ascertain which product is most suited to your application.
All of the information contained in this document is provided for informational purposes only and the METACONCEPT Group will not be held liable for it.
Other metaconcept products
Zamak
Soldering Sticks
