CRES stands for Corrosion Resistant. What you have is regular old 304.
What does CRES stand for and is there Different Grades for this material? How well does it machine?
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CRES stands for Corrosion Resistant. What you have is regular old 304.
Thank you for that info. This is very helpful.
It machines ok, but much slower than 1018. Drilling with split point cobalt at 30 sfm is what I would recommend. Milling with cobalt roughers flooded (65 sfm) and TiALN coated carbide finishers dry (250sfm). Rubbing work hardens the piece. Never dwell and you should be good.
If you can, use 304L; it has higher machinability. If no further specs are called out (ASTM, etc.) any commercial grade can be used. 304 is Austenitic (non-magnetic). End milling & turning speeds are 60-110 SFPM HSS, 220-360 SFPM carbide (from the Machining Data Handbook). It work-hardens easily so don't dwell or make skin passes. It welds easily also.
Great info, thanks all.
How does 303 compare to 304 for lathe machining, assuming that both are readily available?
303 is 2 to 5 times EASIER to machine. Given a choice I think any experienced machinist would go with 303.
An old saying: "303 she's for me, 304 she's a whore"
I love deadlines- I like the whooshing sound they make as they fly by.
I have a material call out that only says "CRES per Matl Spec 6863". Anyone know what that spec is? Would that make the CRES 301, 303, 304?
Thanks, Tim
But 304 looks so lovely when done right