Black Bar

[Graham Williams 11Participant @grahamwilliams11]

[Graham Williams 11Participant @grahamwilliams11]

Is black, presume hot rolled, round steel bar generally or always of EN3B spec???

Cheers

GW

[Anonymous]

EN3 is the most common spec, but not the only one. You can get EN8 as black bar.

Andrew

[JasonBModerator @jasonb]

You can even get EN1A but not from many of the usual ME suppliers.

[vintage engineerParticipant @vintageengineer]

Be very careful with mild steel black bar. This is normally recycled steel and full of all sorts of crap!

[David George 1Participant @davidgeorge1]

I have EN 40B black bar and EN 32 black bar so beware what you buy and suplier.

David

[John MCParticipant @johnmc39344]

My preference is to always go for black bar if it's available in the grade of steel I want to purchase. Two reasons, its usually cheaper than bright drawn, also less prone to distortion during machining.

If steel is sold as EN3, black or cold drawn it will be EN3. All "new" steel will contain recycled steel, steel being one of the most recycled materials.

John

[duncan webster 1Participant @duncanwebster1]

Posted by John MC on 14/09/2019 18:02:50:

My preference is to always go for black bar if it's available in the grade of steel I want to purchase. Two reasons, its usually cheaper than bright drawn, also less prone to distortion during machining.

If steel is sold as EN3, black or cold drawn it will be EN3. All "new" steel will contain recycled steel, steel being one of the most recycled materials.

John

And a lot of cast iron is made from steel scrap by adding carbon. The reason I think is you know what you are starting with, so you have a chance of knowing what you finish with.

[Author]

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