Category Archives: stainless steel

Intergranular corrosion of a martensitic stainless steel

Martensitic stainless steel (420B) microstructure show carbides precipitate at grain boundaries. Chromium, present in the matrix to guarantee corrosion resistance, is taken away to form chromium carbides. This causes a strong reduction in the corrosion resistance just near the carbides. This … Continue reading

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Stress corrosion cracking of an austenitic stainless steel

Achilles’heel of austenitic stainless steel is stress corrosion cracking. This steel family, born to sove any problem in corrosion is particularly susceptible to SCC in mildly  aggressive chloride environments. In the image the typical aspect of a SCC crack. It propagates normal to the applied … Continue reading

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Ferritic stainless steel welding

Ferritic stainless steel resistance welding The welding of ferritic stainless steel presents certain problems, at times underestimated. We must not only worry about the precipitation of carbides at the grain border, the embrittlement due to a constant 475°C, or the … Continue reading

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