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Peculiarities of steel brazing

Soldering of steels should be carried out with the use of solder, the composition of which differs from the chemistry of the starting materials - steels. In most cases the soldering of steels is used in tool making, for repair of steel pipes, unloaded car parts , etc.

Solder, soldering iron

Use lead-tin solder type POS-40, POS-61 , etc.; Use a special soldering iron or a gas heater. Soldering iron power depends on the size and length of the soldered seam, but cannot be less than 80 W. It should be noted that the melting temperature of the selected soldering iron must not be lower than the maximum heating temperature of the steelwork (temperature reserve should not be lower than 30...50°C). Supplier Evek GmbH offers to buy tin at an affordable price in a wide range. We provide product delivery anywhere in the continent. The price is optimal.

Flux, tinning

Flux, whose task is to remove the oxide film that will form on the adjacent parts heated to temperatures of at least 240 ... 300 ° C. Acid fluxes are required for steels. Use zinc chloride, and in its absence before soldering steel parts before tinning - pre-coating the surface cleaned from grease and oil with a thin layer of tin solder: the quality of soldering will be improved.

Surface preparation

It is unacceptable to use for soldering surfaces with traces of grease and oil, as well as oxide films. Removal of such dirt must be done chemically using solvents and mechanically using stiff metallic brushes.

Heating

For quality brazing it is important to heat the surface of the future joint evenly. The temperature created by an additional heating source should be lower than that developed on the electric soldering iron tip: in this way the temperature background will be more homogeneous. Otherwise, the solder may not harden. The heating temperature is selected experimentally, depending on the chemical composition of the steel, but with increasing percentage of carbon it will be less.

Buy. Supplier, price

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