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Free Cutting Mild Steel Flat

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Thomas Gregory 110/12/2021 12:37:03
15 forum posts
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I need some 2"1/2 x 1/2 flat mild steel which I need to bore a hole and put a radius on the flat corners (if that makes sense) using the lathe. I see lots of EN3B about but is there anything else that may be suitable?

M-Machine sell EN8 and EN32B but searching looks like there's a lot of issues machining these?

Many Thanks
Tom

Edited By Thomas Gregory 1 on 10/12/2021 12:55:47

JasonB10/12/2021 13:02:18
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25215 forum posts
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EN3B is not a problem to machine and should cut easily and give a good finish, I use it a lot on my fabricated engines.

Thomas Gregory 110/12/2021 13:36:49
15 forum posts
8 photos

Just what I wanted to hear, thanks.

Bo'sun10/12/2021 14:46:08
754 forum posts
2 photos

While vaguely relating to this thread, has anyone come across a "succinct" comparison chart of commonly used steels in model engineering with EN numbers, properties, machinability, etc, and cross reference to current specification numbers.

Thor 🇳🇴10/12/2021 16:14:59
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1766 forum posts
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Posted by Bo'sun on 10/12/2021 14:46:08:

While vaguely relating to this thread, has anyone come across a "succinct" comparison chart of commonly used steels in model engineering with EN numbers, properties, machinability, etc, and cross reference to current specification numbers.

Something like these maybe?

***Link***

***Link*** (uses old EN numbers, analysis and use)

***Link*** (compares various standards)

***Link*** (machinability)

 

Thor

 

Edited By Thor 🇳🇴 on 10/12/2021 16:21:26

Bo'sun10/12/2021 16:55:49
754 forum posts
2 photos

Thank you Thor,

That's just the sort of thing I had in mind. Just need to get my head around the "% machinability index".

Vic10/12/2021 17:49:13
3453 forum posts
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Is there a machinability index for common stainless steels? Good links by the way Thor. wink

Thor 🇳🇴10/12/2021 18:01:49
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1766 forum posts
46 photos
Posted by Vic on 10/12/2021 17:49:13:

Is there a machinability index for common stainless steels? Good links by the way Thor. wink

A few links, I have only tried the austenitic stainless steels and 303 is easier to machine than 316:

***Link***

***Link***

Thor

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