Dedan Kimathi University of Technology
Course; Manufacturing Processes I
SOLDERING AND JOINING PROCESSES
Master the fundamentals of metal joining with these comprehensive engineering notes. Designed specifically for
Manufacturing Technology and Workshop Practice units, this guide breaks down complex industrial processes
into clear, digestible summaries.
Inside these notes, you will find:
• 7 Core Soldering Methods: In-depth coverage of Iron, Torch, Dip, Wave, Induction, Resistant, and
Infrared Soldering.
• The "AAD" Advantage: Every process is analyzed with a structured list of Applications, Advantages, and
Disadvantages, perfect for quick revision and answering essay questions.
• Technical Procedures: Step-by-step guides on safety gear, surface preparation, flux application, and
proper heat control.
• Maintenance & Rework: Detailed sections on Desoldering techniques (pumps, wicks, air) and defect
prevention.
• Visual presentations.
Ideal For: Mechanical Engineering Students, TVET Students, and Workshop Technicians.
1|Page
, SOLDERING
Soldering is a process that joins two or more types of metals using a filler metal which melts at
lower temperature compared to the base metal. The filler metal is distributed between closely
fitted surfaces of the workpieces.
The solder is a nonferrous filler metal alloy (typically an alloy of tin and lead) used in soldering
that has a liquidous not exceeding 450 degrees Celsius and is melted using hot iron. A strong
electrical and mechanical bond forms between the metal surfaces when the solder cools.
Types of soldering
1. Soft soldering (Each type varies by temperature required
2. Hard soldering and the strength of the final joint.)
3. Brazing
Soldering is widely used in electronics, plumbing and metalworking offering precise and reliable joints
especially for small and sensitive components.
While soldering is simpler and safer than welding, it produces weaker joints and isn’t suitable for high-stress
and high-temperature environments.
Soldering works well with the following base metals; gold silver iron brass copper alluminium steel titanium.
Harder materials may need filler materials with a higher melting point to be joined.
Common methods of soldering
The following are common soldering methods;
2|Page
Course; Manufacturing Processes I
SOLDERING AND JOINING PROCESSES
Master the fundamentals of metal joining with these comprehensive engineering notes. Designed specifically for
Manufacturing Technology and Workshop Practice units, this guide breaks down complex industrial processes
into clear, digestible summaries.
Inside these notes, you will find:
• 7 Core Soldering Methods: In-depth coverage of Iron, Torch, Dip, Wave, Induction, Resistant, and
Infrared Soldering.
• The "AAD" Advantage: Every process is analyzed with a structured list of Applications, Advantages, and
Disadvantages, perfect for quick revision and answering essay questions.
• Technical Procedures: Step-by-step guides on safety gear, surface preparation, flux application, and
proper heat control.
• Maintenance & Rework: Detailed sections on Desoldering techniques (pumps, wicks, air) and defect
prevention.
• Visual presentations.
Ideal For: Mechanical Engineering Students, TVET Students, and Workshop Technicians.
1|Page
, SOLDERING
Soldering is a process that joins two or more types of metals using a filler metal which melts at
lower temperature compared to the base metal. The filler metal is distributed between closely
fitted surfaces of the workpieces.
The solder is a nonferrous filler metal alloy (typically an alloy of tin and lead) used in soldering
that has a liquidous not exceeding 450 degrees Celsius and is melted using hot iron. A strong
electrical and mechanical bond forms between the metal surfaces when the solder cools.
Types of soldering
1. Soft soldering (Each type varies by temperature required
2. Hard soldering and the strength of the final joint.)
3. Brazing
Soldering is widely used in electronics, plumbing and metalworking offering precise and reliable joints
especially for small and sensitive components.
While soldering is simpler and safer than welding, it produces weaker joints and isn’t suitable for high-stress
and high-temperature environments.
Soldering works well with the following base metals; gold silver iron brass copper alluminium steel titanium.
Harder materials may need filler materials with a higher melting point to be joined.
Common methods of soldering
The following are common soldering methods;
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