Ferrite content analysis is a non-destructive testing method which provides critical data for austenitic stainless steel and duplex materials. The delta ferrite percentage or number allows a technical assessment of material corrosion susc eptibility, mechanical properties, service suitability, and service reliability. To perform properly ferrite testing, both a minimum material thickness and a minimum specimen size are required. Test results are interpreted in accordance with current specifications and/or customer requirements. Reports issued are accompanied when necessary by drawings to identify locations tested.
APPLIES FT TO INSPECT- Austenitic stainless steel/Duplex stainless steels
- Welds (tubing, etc.)
- Normal construction steel with Austenitic chrome alloy steel welded cladding (Ex. Boilers, vessels, etc.)
- Weldments, Castings, Forgings, Weld Overlays, Wrought materials
- Weld materials
- Butt/fillet welds
- Stainless weld overlays on non-ferrous interfaces
- In-service and in-construction components
- Rapid and accurate analysis
- Highly portable digital technology
- Variable calibration in both Ferrite Number (FN) and % Ferrite (FN) using AWS Standards
- Testing instrument meets all requirements of ANSI/AWS A4.2 and DIN EN ISO 8249
- Calibration is traceable to internationally approved IIW secondary calibration standards
- Not recommended where the material is at temperatures greater than approximately 125 °F
- Surface preparation is very important for result accuracy
- Both a minimum material thickness and a minimum specimen size are required
- Shape of the specimen may have a negative effect on the results obtained. Correction calculations can be performed in some instances
