An electron-beam welding operation will join two pieces of steel plate together. The plates are 2.5 cm thick. The unit melting energy is 8050 J/cm3. The diameter of the work area focus of the beam is 0.15 cm, hence the width of the weld will be 0.15 cm. The accelerating voltage is 30 kV and the beam current is 35 milliamp. The heat transfer factor is 0.70 and the melting factor is 0.55. If the beam moves at a speed of 125 cm/min, will the beam penetrate the full thickness of the plates

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