Welding current on PQR for pulsed welding 1

[stanweld99]

If pulsed welding is used for GTAW, such as 170A/70A (170 is peak and 70A is background current) is the min pulsed current and 300A/250A is the max pulsed current used for PQR test coupon, what current range should be put on the PQR if the code is per ASME SEC IX? 170-300A or 70-300A? or Calculating the average of the current range used and put on the PQR?

 

[EnergyMix]

The average wouldn't do you much good now would it? Why not put max/min values and give the welders all the information that they need to have?

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[weldtek]

If the WPS is impact qualified you need to review QW409.1

 

[drumsdw]

I agree with weldtek. Review the requirements in QW409.1. I perform numerous pulse welding processes in which I must calculate average currents from different waveforms, the code spells out all the required steps.