View Full Version : What grade Stainless Steel?

02-23-2011, 06:53 AM
Hi All,

I am wanting to machine and make some parts for a model engine, push rods, rocker arm and flywheel out of stainless steel. I need / would like to get a real good polished finish on the parts, what would be the best grade Stainless to use...?


02-23-2011, 08:17 AM
Over here I use our grade 303 stainless. It's very easy to machine. I don't know what your classification would be.

02-23-2011, 08:50 AM
303/304L or for a high polish finish 316L

The L designation is Low Carbon content which gives an easier turning and machining operation.

Regards Ian.

02-23-2011, 09:43 AM
My vote is for 416 - machines like a dream. It doesn't appear to have that "toughness" associated with 303 which can rear its head with small parts. Haven't tried 316 though.


02-23-2011, 08:50 PM
The "L" in 304L and 316L is indeed for low carbon. Not to pic nits, but it is to prevent carbide precipitation - forming chromium carbide - during welding. Without the even distribution of chrome, corrosion (rusting) occurs MUCH more easily.

Avoid running 316 / 316L parts together as it will cause severe galling.

416 does machine nicely for me. It's not as corrosion resistant as 304 or 316, but won't corrode or discolor easily.

02-23-2011, 10:17 PM
Go with the 303, it machines well, like 360 brass compared to 316, and it is more corrosion resistant than 416.

02-23-2011, 10:35 PM
sorry, double post.