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Welding: Principles and Applicatio...

8th Edition
Larry Jeffus
ISBN: 9781305494695

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BuyFindarrow_forward

Welding: Principles and Applicatio...

8th Edition
Larry Jeffus
ISBN: 9781305494695
Textbook Problem
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How are brazing and soldering methods grouped?

To determine

The manner in which brazing and soldering methods are grouped.

Explanation

Soldering:

Soldering is a joining method which is used to join similar or dissimilar metals with the help of some filler material. The liquidus temperature of this filler material should be less than 427o Celsius. The features which make the soldering different from brazing are as follows:

  1. The filler material should be an alloy of lead (Pb) and tin (Sn). This filler material is generally known as the solder.
  2. The soldering material or the solder is melted, and it is used in liquid phase while joining process. This liquid solder seeps inside the joint through the capillary action.
  3. The flux material used in soldering process is either Zinc chloride (zncl2) or Ammonium chloride (NH4Cl).
  4. When it comes to the comparison of strengths, the strength of soldering is less as compared to the strength of brazing.
  5. The soldering joining process finds its application in fabrication of electrical and electronic circuits.

Brazing:

Brazing is a joining method which is used to join similar or dissimilar metals with the help of some filler material. The liquidus temperature of this filler material should be more than 427o Celsius, but it is limited by solidus temperature of base metal. The features which make the brazing process different from soldering process are as follows:

  1. The filler material should be an alloy of copper (Cu) and Zinc (Zn). This filler material is generally known as the filler material for brazing. This alloy of copper and zinc is known as brass.
  2. The brazing material or the brass is melted, and it is used in liquid phase while joining process. This liquid brass seeps inside the joint through the capillary action.
  3. The flux material used in brazing process is borax.
  4. When it comes to the comparison of strengths, the strength of soldering is less as compared to the strength of brazing. The braze joint has more strength.
  5. The brazing joint is used in producing leak proof joint in hydraulic circuits and pipe joining processes.

Fluxes are the chemical compounds which react with the base metal also. The reaction of the base metal with flux can be in the form of salts, alkali or acids.

The soldering fluxes may be acidic such as muriatic acid which is a diluted hydraulic acid, or the flux may be a salt such as Cal-ammoniac which is ammonium chloride, or the flux may simply be a rosin...

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