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Chemical Process Technology

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Tuesday, June 3, 2008

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Stainless Steel (i.e. SS316) is "soft" compare to other material e.g Cast Iron, Duplex stainless steel, etc. due to it has high ductility. However, high ductility of stainless steel make a good material resist cavitation.

How stainless steel against cavitation ?

The main reason is due to work-hardening property of Stainless Steel. Hammering a SS316 strip would lead to surface work-hardens and difficult to change the shape.

Similar phenomenon occurs when microjet impacting on the surface of stainless steel and caused the Stainless steel work-hardens, and increase resistance to further cavitation.

SS316 resists cavitation about 10-15 times better than cast iron whilst CA6NM (modified SS316) is roughly 2-3 times more resistant to cavitation as compared to SS 316.

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posted by Webworm, 3:35 PM

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