What is SIL-FOS 15 used for?

What is SIL-FOS 15 used for?

PRODUCT USES Sil-Fos 15 and was developed primarily for use on copper, but its use has extended to other nonferrous copper base alloys. It is used extensively on refrigeration units, air conditioning apparatus, electrical conductors, copper and brass pipe fittings, and other copper and brass equipment.

Can Sil-Fos 15 be used on steel?

Lucas-Milhaupt recommends not using Sil-Fos on steel, and using caution when joining nickel-bearing alloys. This is because the phosphorous in Sil-Fos will form brittle intermetallics-ironphosphides and nickelphosphides-with iron and nickel.

What is Sil-Fos made of?

Sil-Fos alloys combine silver (Ag), copper (Cu), and phosphorous (P) to produce consistent, quality joints while saving on materials plus reducing time and process costs. Sil-Fos® alloys have become popular in the HVAC/R and plumbing industries because of the ability to join copper to copper without flux.

Do you need flux to braze?

Flux is essential in the brazing process because it prevents oxides from forming and inhibiting the metallurgical bond in brazing. Oxides are the result of chemical combination between the hot metal and oxygen in the air and form when a metal surface is heated.

Can you Silfos copper to brass?

Lucas-Milhaupt® Sil-Fos® brazing products provide a self-fluxing ability on copper, eliminating the time and expense of fluxing. However, when your operation involves brazing copper to brass or bronze, flux is required to join these different metals.

Can I solder copper to steel?

Yes copper and stainless steel can easily be soldered or brazed together using a filler material that usually contains tin and silver . Unlike welding were we melt the two metals together, brazing or soldering use a filler material to bond the two parts together without melting them.

How do you get solder to stick to steel?

Hold your soldering iron against the metal for an extended time until it reaches temperatures high enough for the solder to melt and adhere to the metal. You can also use a propane torch to heat the exterior of the metal you are working with, depending on its size and metal type.

Is brazing as strong as welding?

Comparative Advantages. First, a brazed joint is a strong joint. A properly made brazed joint (like a welded joint) will in many cases be as strong or stronger than the metals being joined. Second, the joint is made at relatively low temperatures, ranging from about 1150°F to 1600°F (620°C to 870°C).

Do you need flux with Silfos 15?

Sil-Fos 15 is the preferred alloy for general copper-copper brazing; the phosphorous in the Sil-Fos family serves as a fluxing agent on coper, so no flux is recommended.

Can I use borax as brazing flux?

Borax-based fluxes: In addition to being a common ingredient in detergents and many other products, borax has long been used as a flux in welding processes, including brazing. Borax improves the flow of filler metals and reacts with certain oxides to lower their melting points.

Why do you braze with nitrogen?

To prevent oxidation, flow dry nitrogen through the tube during brazing. Nitrogen is inert (non-reactive) and will displace the oxygen to prevent scale formation.

Is flux always required when brazing?

Fluxing is an essential step in the brazing operation, aside from a few exceptions. You can join copper to copper without flux, by using a brazing filler metal specially formulated for the job, such as Handy & Harman’s Sil-Fos or Fos-Flo 7. (The phosphorus in these alloys acts as a fluxing agent on copper.)

Do you need flux when soldering copper to brass?

The good news is you don’t need many expensive parts or tools to start soldering copper and brass together. In fact, all you really need is some flux, blow torch and some solder.

Does brazing require flux?

What metal does solder not stick?

Solder will not stick to just any metal. For example you will never get solder to stick to Aluminum. With compatible metals, however, you must use a suitable flux after preparing the metal surface to remove any oxidation. The flux will prevent new oxidation from forming when you heat the metal.