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How To Strike A Welding Arc. Picture 005 shows propagation of crack shown by PT. This is P91 material.
One thing to be careful of as youre welding this rod is being consumed. Arc Strikes result in localized base metal heating and very rapid cooling. The electricity of the welder will pass through the rod and the arc and will create a temperature of up to 7000 F at the point of contact.
Arc Strikes result in localized base metal heating and very rapid cooling.
That is its growing shorter. When located outside the intended weld area they may result on hardening or. Arc striking but infrequently. Picture 001 shows a leak.