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Phosphoric Acid Flux for Stainless Steel Soldering

£40.74 £33.95
In Stock
MPN: F051

Trying to solder stainless steel and having problems? Use the correct flux, Phosphoric Acid flux, and get excellent solder joints.

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A 75% Phosphoric Acid flux available from Somerset Solders designed to aid the soldering of metals such as Stainless Steel and Nickel Chromium where tough oxide layers are present. Phosphoric Acid, recommended by the British Stainless Steel Association, allows wetting of the metal surfaces where Zinc Chloride and Rosin based fluxes would be ineffective. 


For Stainless Steel and Nickel Chromium soldering

Promotes excellent wetting

Supplied in a 500ml  bottle

Easy residue removal in warm soapy water

Safety Data Sheet for Phosphoric Acid


More Information
Brand AIM Solders
Customise No
Collect in Store No

When soldering stainless steel which solder can be used?
Conventional Tin Lead solders can be used for soldering of stainless steel, as well as a high Tin solder such as the Lead Free 99C alloy. It is recommended that the Tin content is greater than 50% to give good bond strength.

What solders are
We stock a 60% Tin 40% Lead blowpipe solder (grade K). Blowpipe are thin sticks of solder approximately 5mm in diameter and 500mm in length. We also stock the Summit Solder range from AIM Solders and the 99C Lead Free on 250g and 500g reels would be suitable and give a good colour match.

Should the flux residues be removed and if so how?
Yes removing of the residues is important. As the flux is acid based removal will prevent discolouration of the metal and any further corrosion. Warm soapy water does the trick. 


MPN F051
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Registered address: 124 High Street, Midsomer Norton, Radstock, Somerset, BA3 2DA.