Welding automation

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Assuming;

The specific heat of steel is 420 J/(kg°C)​

Plain steel has a density of around 7.85g/cm³
Estimating temperature rise of about 2500 °C
Estimate 4 mm cubed = 0.064 cm³
Compute the energy [J]
Estimate the rise time in temperature.
Compute the Power [J/s]
Estimate resistance vs temp

Compute the current.​

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