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Soldering brass

Soldering brass Welding brass

Peculiarities of soldering

Brazing temperature depends on the amount of zinc in the alloy, and does not depend on the thickness of the processed product. Remember that high-temperature brazing of rolled brass can complicate the burnout of zinc with the formation of cracks and pores. The melting temperature depends on the amount of zinc in the alloy, and does not depend on the thickness of the processed item.

Fluxes

Before low-temperature soldering with lead-tin solders, remove the oxide film from the surface with rosin-alcohol or more active fluxes, such as zinc chloride-based fluxes. Brass is not readily soluble in lead-tin solders. The compounds obtained by soldering L63 with lead-tin solders have a lower tensile strength compared to copper - under the same conditions. For example, the ultimate strength of tin-bonded joints of copper is 90 MPa, that of brass is not more than 59 MPa.

Solders

When brazing brasses with high copper content silver brazing alloy s are used: PSr40, PSr72, PSr45, PSr12, PSr25. When brazing brass, L68, L63 use solder PSr40. Phosphorous solders are not suitable for them as they produce low ductility solder joints. This can be explained by the fact that brittle zinc phosphides are formed in the solder seam.

For those joints that are not subjected to dynamic and vibration loads, PMC48 and PMC36 solders are used. During soldering with copper-phosphorous and silver solders, the brass starts to dissolve intensively. Therefore to reduce the contact of solid metal and liquid solder they should be soldered at high heating rates. Brass of L63 grade dissolves intensively in solders PSr45, PSr40 and PSr15 and much less in solders PSr50KD and PSr37.5.

Temperature conditions

Parts made of brass can be brazed at temperatures of 850-870°C and in salt baths. To improve the flow of solder in the bath solution in the gap adds 4-5% flux, which contains borax or potassium fluoroborate. In the process of heating the parts in ovens and in the flame of gas burners is also oxidation and evaporation of zinc, thereby worsening the flow of solder. When brazing brass with a burner, the oxidation and evaporation of zinc in the reducing flame can be slightly reduced. The porosity in the solder joints is thus reduced.

Furnizor

Are you interested in brazing brass? Supplier Auremo offers brazing of brass with borax, hard solder, tin. We offer to buy rolled brass from the specialized warehouses of the supplier "Auremo" with delivery in any city. Full compliance with GOST and international quality standards. Wholesale customers price - preferential. Buy today.

Buy at a discounted price.

Auremo supplier's warehouse offers the widest selection of products. We offer brazing brass borax, hard solder, tin, the price - due to the technological features of production without the inclusion of additional costs. Buy rolled brass today, the best price from a supplier. We are waiting for your orders. We have the best price-quality ratio for the whole range of products. On communication experienced managers - will promptly help you buy brass rolling in bulk or in installments. Regular customers can buy brass rolling with a discount discount, the price - the best in this segment of rolled products. Supplier "Auremo" is a recognized expert in the market of non-ferrous metals. Thanks to the representative offices in Eastern Europe, we have the possibility of prompt interaction with trade partners.

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