Aluminum Alloy Brazing Sheet

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.

Aluminum alloy brazing sheet.

The clad sheet usually fig. I structure of multiclad key words vacuum brazing clad aluminum aa 4004 cladding aa 3003. 2 reduced risk of intergranular corro sion. Introduction automotive radiators are increasingly being manufactured of aluminum alloys joined by brazing.

These filler metals are available as wire or shim stock. Aluminum brazing sheet for brazed automobile heat exchangers 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. 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. 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.

Silicon and copper are typically added to pure aluminum to lower melting range and provide a suitable joining material. Commercial brazing filler metals for aluminum alloys are aluminum base. Brazing aluminum is a quick and inexpensive option for repairing leaks cracks or holes in aluminum and is often found in air conditioning repairs. The standard brazing process involves joining of components with a brazing alloy typically an aluminium silicon filler alloy.

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. A convenient method of preplacing filler metal is by using a brazing sheet an aluminum alloy base metal coated on one or both sides. 3 improved strength of finished prod uct. Magnesium can also be added to aluminum to assist in the facilitation of oxide dispersion in vacuum brazing.

We have developed and are refining a variety of products of this sort. Aluminum brazing filler metals. 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.