Black Bar

Black Bar

This topic has 7 replies, 7 voices, and was last updated 15 September 2019 at 00:18 by duncan webster 1.

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14 September 2019 at 12:03 #26837
Graham Williams 11
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@grahamwilliams11
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14 September 2019 at 12:03 #428937
Graham Williams 11
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@grahamwilliams11
Is black, presume hot rolled, round steel bar generally or always of EN3B spec???

Cheers

GW
14 September 2019 at 12:07 #428938
Anonymous
EN3 is the most common spec, but not the only one. You can get EN8 as black bar.

Andrew
14 September 2019 at 13:18 #428944
JasonB
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@jasonb
You can even get EN1A but not from many of the usual ME suppliers.
14 September 2019 at 14:25 #428947
vintage engineer
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@vintageengineer
Be very careful with mild steel black bar. This is normally recycled steel and full of all sorts of crap!
14 September 2019 at 16:31 #428960
David George 1
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@davidgeorge1
I have EN 40B black bar and EN 32 black bar so beware what you buy and suplier.

David
14 September 2019 at 18:02 #428976
John MC
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@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
15 September 2019 at 00:18 #429028
duncan webster 1
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@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.
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