What is the highest temperature a weld is performed at?

Answer 5,000 degrees

The highest recorded temperature of a weld was 5,000 degrees Fahrenheit. This type of temperature is usually achieved by a thermite reaction. Thermite is a metal powder used to increase the heat of material in order to melt metal. Aluminum is the most commonly used thermite as it is plentiful, cheap and does the job it needs to do.

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