Ferrite Testing: Piping Quiz

What is Ferrite testing: It is a technique used to measure the delta ferrite content in

Ferrite testing is considered a form of nondestructive testing.

Measuring the delta ferrite content helps in establishing

If the ferrite content is too low, then the stainless steel may be susceptible to solidification cracking (hot cracking) upon welding

If the ferrite content is too high, then the risk of corrosion decreases.

Mechanical properties of the stainless steel could be negatively affected if the ferrite content is too high

The presence of ferrite in the range of 4-8% in austenitic stainless steel welds is ideal

In duplex stainless steels, 35 to 65% ferrite is preferred, though 50% is optimum