Our technicians are qualified according to specific procedures within our documented quality program , and technicians are audited to ensure competence over time.
The Acuren technicians that perform this testing are often specific metallurgical technologists and understand what the results mean in relation to the material properties. Not all testing organizations have this level of rigor in their quality program, nor the level of expertise within their technician pool of resources.
Additionally, Acuren employs approximately 100 engineers which are trained and qualified to make recommendations for customers that need additional assistance when interpreting results or making decisions on the best course of action based on the findings of the test.
What is a desirable ferrite content percentage ?
The proper percentage of ferrite depends on the type of stainless steel you are working with.
Ferrite content in austenitic stainless steel
The presence of ferrite in the range of 4-8% in austenitic stainless steel welds is ideal. This percentage has proven effective in controlling micro-cracking of weld metal during cooling.
Ferrite content in duplex stainless steel
In duplex stainless steels, 35 to 65% ferrite is preferred, though 50% is optimum. This ensures corrosion resistance, toughness and strength.
How is ferrite content measured?
Testing ferrite content is fast, and results are immediate.
A probe is placed on the material being investigated, and a closed magnetic circuit is formed. This allows us to measure the magnetic permeability
This permeability is measured against standard percentages of other materials with known ferrite content.
The permeability of the material being analyzed indicates the ferrite content percentage..
The ferrite content is read from a digital-readout.
Does the testing damage the material?
The technique we use is nondestructive. The surface to be tested must be clean and smooth.
How accurate is ferrite testing?
Calibration pieces are used to ensure accuracy, but results can be influenced by shape, size and surface condition of the component. Typical accuracy within the industry is +/-5%.
Richarson Oilseed is one of Canada’s oldest and largest fully-integrated crushing, refining, processing and packaging operations. In the absence of timely manufacturer support for a critical equipment issue, the full time onsite Acuren Condition Monitoring Specialist was able to diagnose and provide a detailed correction path on a defective trunion bearing.
When our large refining customer was faced with the requirement to upgrade one of their major crude storage tanks they turned to Acuren’s expertise. We were able to eliminate the hydrostatic test activities through the application of Fitness For Service (FFS) Methodologies as permitted by API 653.
Structural design engineers, inspectors, nondestructive testing technicians, laboratory technologists and rope access technicians deliver solutions to help you design, construct and maintain your buildings and valuable infrastructure.