Aluminum Alloy Brazing Sheet

Aluminum brazing filler metals.

Aluminum alloy brazing sheet.

Cladding an aluminum silicon alloy with a brazing sheet provides an aluminum alloy that has the thin walls necessary for use in automobile heat exchangers as well as such desirable characteristics as high strength corrosion resistance and formability. These filler metals are available as wire or shim stock. It seems to me that it would be very impractical to braze anything very large the amount of time it would take to heat a large weldment of aluminum to 600 degrees would not be practical it is also unclear if this brazing rod fills with capillary action brazing or is it braze welding where the base metal is brought up to tinning temperature and a bead is deposited over the seam with the. Heat treatable or core alloys composed mainly of manganese or magnesium are also used.

Aluminum brazing alloys are used to join brazeable aluminum base metals. Introduction automotive radiators are increasingly being manufactured of aluminum alloys joined by brazing. I structure of multiclad key words vacuum brazing clad aluminum aa 4004 cladding aa 3003. As well as aluminium brazing seen here we can tig mig and spot weld all commercially available sheet metal materials including stainless steel mild steel zintec galvanised steel and aluminium.

Silicon and copper are typically added to pure aluminum to lower melting range and provide a suitable joining material. The standard brazing process involves joining of components with a brazing alloy typically an aluminium silicon filler alloy. Magnesium can also be added to aluminum to assist in the facilitation of oxide dispersion in vacuum brazing. Al si brazing aluminum alloys have melting ranges from 577 c to 610 c which is appreciably lower than the melting point range of the base brazing aluminium alloy used for heat exchangers 630 c 660 c.

Commercial brazing filler metals for aluminum alloys are aluminum base. 2 reduced risk of intergranular corro sion. The clad sheet usually fig. A multi layered aluminum alloy brazing sheet including a core material an intermediate layer on at least one side of the core material the intermediate layer comprising an al si braze alloy and a thin covering layer on top of the intermediate layer the core material and the covering layer have a higher melting temperature than the al si braze alloy.

When compared to welding equipment aluminum brazing equipment is inexpensive portable and does not require high amounts of voltage. Brazing aluminum is a quick and inexpensive option for repairing leaks cracks or holes in aluminum and is often found in air conditioning repairs. We have developed and are refining a variety of products of this sort.