How is the ferrite content controlled in austenitic stainless steel?
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Does anyone know how the ferrite content in austenitic stainless steel materials is controlled? And what is the ferrite content control level for the cylinder head? Which standard provides the basis? What impact will it have once it occurs?
In theory, the ferrite content in the raw materials used for the cylinder and end caps is very low; actual measurements show it to be below 1%. In contrast, the ferrite content in the welds is higher, with an allowable range of 3-8%. This range is negotiable; some go up to 10%. Any higher and it won’t work. No special control is needed; normal protection is sufficient, and welding with low energy poses no problem.
First, control the raw materials; attention should also be paid to welding materials and welding processes...
The 2nd floor is very strong; it would be perfect if some technical evidence were added.