Ferrite test is accurate way to measure delta ferrite content in austenitic and duplex stainless steel, without destroying the method as NDT technique. Proper ferrite content provides a balance between ductility, toughness, corrosion resistance and crack prevention.

When ferrite content is too high, stainless steel can lose ductility, toughness, and corrosion resistance – especially at high temperatures. If ferrite content is too low, stainless-steel welds become susceptible to hot cracking or solidification cracks.

SGEIPL Inspectors can measure and report ferrite content of welds and components during fabrication and for in-service applications with two different test methods, depending on code or customer requirements.

Test measurements can be reported by ferrite number (FN) or by ferrite percentage in conformance with welding procedures, customer drawings, and specifications by direct reading or conversion.

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