Enter the ppm of phosphorous, antimony, tin, and arsenic of the filler metal into the calculator to determine the x-factor.

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## X Factor Formula

The following formula is used to calculate an X factor for welding.

X = (10*P + 5*Sb + 4*Sn + As) / 100

- Where X is the x-factor
- P is the amount of phosphorous (ppm)
- Sb is the amount of antimony (ppm)
- Sn is the amount of tin (ppm)
- As is the amount of arsenic (ppm)

## X Factor Definition

**What is an x-factor** for welding? An x-factor is a term used in welding to describe the metal filler or weldment’s resistance to brittleness or loss of toughness when the weldment is held.

## Example Problem

How to calculate an X factor?

**First, determine the amount of phosphorous.**For this example, there is 10 ppm of phosphorous.

**Next, determine the amount of antimony.**For this example, there is 20 ppm of antimony.

**Next, determine the amount of tin.**For this problem, there is 15 ppm of tin.

**Next, determine the amount of arsenic.**For this example, there is 5 ppm of arsenic.

**Finally, calculate the x factor.**Using the formula, X = (10*10 + 20*5 + 15*4 + 5) / 100 = 2.65