Clad plate surfacing, ferrite content
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For the surfacing of composite plate CS+SS316, is it necessary to test the ferrite content? What is the control range for ferrite content?
It is needed. It is generally between 3 and 8. We usually require that the welding materials for the transition layer not be pure austenitic types; they must contain ferrite as well.
3-8 are the requirements for welding materials. .
For surfacing austenitic materials such as 316, it is not necessary to measure the ferrite content. Double-phase steel needs to be tested.