4.1 Soft Soldering

• Meaning of soft soldering as a thermal joining process in metalwork
• The tools and equipment used in soft soldering
• Solder: composition, properties and the function of the filler metal
• Fluxes: types, function and the cleaning of joint surfaces
• Soldering bits, tinning and the sources of heat
• Preparation and cleaning of the work before soldering
• The procedure of soft soldering
• Wetting, heat control and the setting of a soldered joint
• Soldering different joints on sheet metal
• Safe use of soft soldering tools and equipment
• Defects in soldered joints and their causes
• Maintenance of soft soldering tools and equipment
• Applications of soft soldering in day-to-day life
• Cleanliness before, during and after soft soldering, and peer review of finished work

• describe soft soldering as a thermal joining process in metalwork
• perform soft soldering for a given task in a metal workshop
• maintain soft soldering tools and equipment in the workshop
• acknowledge the use of soft soldering in day-to-day life

“What is soft soldering?”

“What are the applications of soft soldering in day-to-day life?”

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1. What soft soldering is
   40 min · 1 practice tasks · quiz
   Introduce soft soldering as a thermal joining process and explain how a joint is made.
2. Tools and equipment for soft soldering
   40 min · 1 practice tasks · quiz
   Identify the tools and equipment used in soft soldering.
3. Solder and its function
   40 min · 1 practice tasks · quiz
   Describe the composition, properties and function of the solder.
4. Fluxes and their function
   40 min · 1 practice tasks · quiz
   Explain the function and types of flux used in soft soldering.
5. The soldering bit and sources of heat
   40 min · 1 practice tasks · quiz
   Identify the parts of the bit, sources of heat and how to tin a bit.
6. Preparing the work and the bit
   40 min · 1 practice tasks · quiz
   Prepare and clean the joint and the bit before soldering.
7. The soft soldering procedure
   40 min · 1 practice tasks · quiz
   Carry out the steps of soft soldering to make a joint.
8. Wetting and heat control
   40 min · 1 practice tasks · quiz
   Explain wetting and the effect of correct and incorrect heat.
9. Soldering different joints on sheet metal
   40 min · 1 practice tasks · quiz
   Identify and solder the common sheet metal joints.
10. Safety in soft soldering
    40 min · 1 practice tasks · quiz
    Observe safety when using soft soldering tools and equipment.
11. Defects in soldered joints
    40 min · 1 practice tasks · quiz
    Identify common defects in soldered joints and their causes.
12. Maintaining soldering tools and equipment
    40 min · 1 practice tasks · quiz
    Maintain the soft soldering tools and equipment in the workshop.
13. Applications of soft soldering
    40 min · 1 practice tasks · quiz
    Describe where soft soldering is used in day-to-day life.
14. Checking, cleaning and displaying soldered work
    40 min · 1 practice tasks · quiz
    Inspect, clean and present soldered work for peer review.