Which of the following is the usual (approximate) composition of the soft solder used in soldering?

Lead 80% and Tin 20%
Lead 63% and Tin 37%
Lead 90% and Tin 10%
Lead 37% and Tin 63%

LohaHridoy

4 views

2025-01-04 04:42

1 Answers

AhmedNazir

Option 4 : Lead 37% and Tin 63%

Explanation:

Soldering is the process by which metallic materials are joined with the help of another liquified metal (solder)
Soldering can be classed as soft soldering and hard soldering.
The process of joining metals using tin-lead solders which melt below 420°C is known as soft soldering
The process of joining metals using hard solders consisting of copper, zinc, cadmium and silver which melt above 600° is known as hard soldering
The eutectic alloy of tin-lead solder is a mixture of 63% tin and 37% lead. 63/37 solder melts at 183°C

4 views Answered 2022-09-04 04:29

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