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303 Vs 304L

thread643-274632

303 Vs 304L

303 Vs 304L

(OP)
in our application, 304L component is press-fitted to 303 component (as insert and sleeve). Recently, our supplier unintentially used 303 for both components, huge amount of products have been made, business wants to assess the impact before scrap.

my concern would be steel galling? but can't tell whether it will be worse or the same with supplier's mistake.

any guidence??
notes:
Corrosion is not issue here
304L component requires Rmax 8 surface finish (any impact on surface finish?)
Our supplier has performed testing and dimensional check and all positive, but should I trust them?

RE: 303 Vs 304L

303 being free machining is easier to cut but harder to get a really good surface, I'd be surprised at an Rmax of 8 unless there are special finishing steps.  303 & 304 are so similar (and prone to galling) that I doubt you will see any difference.  Are the parts lubricated prior to press fit?  Good high pressure lubricants will prevent galling.

RE: 303 Vs 304L

I agree with dgallup there likely won't be much difference.  Just make sure the parts are finished to the correct roughness.

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