Gallery, Projects and General > The Design Shop

Key steel BS4235

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David Jupp:
If you just need to refer to a BS document, many library services have a subscription.  I joined Manchester Library (free) purely so I can view BS documents on-line.

Printing of the documents isn't part of the deal - but it's fine for just checking stuff in current standards. 

doubleboost:
I welded some key steel
It went that hard i could only grind it :doh: :doh: :doh:
John

Fergus OMore:
It all depends on*************

Seriously, if you were using oxy/acetylene, you could well have been increasing the carbon content.

Adding carbon to iron and then mild steel to make tool steel is quite normal for your neck of the woods.
I'm refering to the sword makers of Shotley Bridge who made swords so well that gentleman of the day could wind a sword in their top hat.

It all started in 1691 and since then, things have got- well,  less interesting!

doubleboost:
It was welded with tig and mild steel filler rod
They were just tacked together for machining
The welds blunted a milling cutter
The steel used was en6a
John

Fergus OMore:
Perhaps the most obvious question is whether the steel was quenched- and 'let down' to a normal state-- or not.
Again, the next question is what was the shielding gas? and so it goes.

What I can tell you is that there are plenty of steels today that will crack- not just become unmachinable in this world- today.
Again, there is no guarantee that today's metals - are what they are claimed to be.

Perhaps you should have crossed the river to Gateshead Tech-- and become very very sceptical about - a lot of things.

Anyway, perhaps a start with an angle grinder might have saved a lot problems. What I surmise was your problem was that you failed to bring up 'the dottle' which is Geordie Pitmatic for inclusions that lead to porosity and hard dross.
If you think of it, this is what steel makers do by blowing through the melt to remove the impurities!

Might I add that I probably learnt all this as a child in the blacksmith's shop when my father was 'tubing boilers' for locomotives?

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