Felder Bar Solder S-Sn97Cu3

Felder Bar Solder S-Sn97Cu3

• Delivery quantity = 1 250 g bar

High-purity, lead-free bar solder for soft soldering copper, copper alloys, and tinned/nickel-plated components. The proven Sn97/Cu3 alloy ensures stable solder baths, excellent wetting, and homogeneous solder joints – ideal for workshops, production, and maintenance.

Advantages at a glance

• Lead-free & future-proof – Sn97/Cu3 according to common standard requirements

• Constant melting point ~227 °C – clean flow behavior, reproducible results

• High wetting performance on copper and copper alloys

• Low oxidation with correctly set bath and suitable flux

• Suitable for solder baths & re-tinning as well as for manual rework

Typical Applications

• Sanitary/Heating/Air Conditioning: Soft soldering of copper pipes and fittings (with suitable flux)

• Electrical Engineering/Electronics: Re-tinning, repair, bath maintenance, wire and strand soldering

• Metal construction/Precision mechanics: Joining of Cu, CuSn, CuZn and tinned surfaces

Technical Data (Brief Info)

• Alloy: Tin/Copper S-Sn97Cu3 (≈ 97 % Sn / 3 % Cu)

• Melting Point: approx. 227 °C (near eutectic)

• Form: Bars (flux-free)

• Color/Luster: silvery, shiny (alloy-dependent)

• Compatibility: for solder baths, hand soldering, re-tinning – flux required (not included)

Processing Instructions

1. Components metallically clean and degreased.

2. Use suitable flux (e.g., for Cu/Cu alloys; remove residues depending on type).

3. Temperature control: Solder tip temp. or bath temperature above 227 °C, but as low as possible to minimize oxidation.

4. Oxidation protection: Cover/skim solder bath; regular bath maintenance increases service life and solder quality.

5. Safety: Avoid fumes/dust, ensure ventilation, observe PPE.

Quality & Compliance

• Lead-free according to RoHS requirements

• Industry-standard alloy for reliable soft solder joints

• Brand quality FELDER – consistent batches, traceable

Delivery Information

• Units/weights: depending on selection in the shop (bars / containers).

• Storage: dry, dust-free, protected from oxidation; do not let it outgas together with fluxes.

• Accessory tip: suitable FELDER flux for Cu connections as well as solder bath covering agent and oxide skimmer.

FAQ

Do I need additional flux?
Yes. S-Sn97Cu3 bars are flux-free. Choose a flux suitable for the base material.

Is the alloy suitable for drinking water installations?
The alloy is lead-free. Whether it is permissible in your application depends on local standards/approvals and the flux used. Please observe technical regulations.

What temperature should I set?
Guideline: >227 °C, in practice usually 260–300 °C depending on mass and heat input. Choose the lowest possible temperature to reduce oxidation.