Source of Silver Steel

[Brian Sweeting 2Participant @briansweeting2]

Slightly off topic but having looked at the OP link to GROUNDFLATSTOCK.COM they have useful heat treatment data sheets for all of the products.

[Thor 🇳🇴Participant @thor]

Thanks Brian, data sheets downloaded.

Thor

[Neil WyattModerator @neilwyatt]

Posted by John Stevenson on 29/07/2017 18:29:10:
Learn how to chill out.
I used to run round. In 44 tonnes artics, no I make do with an estate car

You think that's a come down?

I used to have a second generation RX7, now I have a Fiat Stilo…

Neil

[Ian S CParticipant @iansc]

If you heat treat your draw bar, it will need to be tempered carefully or the thread will crumble, and if the tempered area stops abruptly you have a good chance of cracking. If you have to have other than mild steel, 4140 is what I would use, it can be heat treated, but in this case is ok as is, it takes a thread better than silver steel(thats what I'v found)

Ian S C

[SamsarandaParticipant @samsaranda]

Ian many thanks for the info, perhaps I won't heat treat but anyway your info stored away for future reference.

Dave

[duncan webster 1Participant @duncanwebster1]

4140 is EN19 near enough

[Anonymous]

Agreed that silver steel can be a pain to thread using a die. It seems to tear only too easily. But it is no problem screwcutting. The thread on the right hand end of this embryo cutter is 25mm diameter 20tpi Whitworth:

It was hardened and tempered with no apparent ill effects. Here it is in action on a steel worm wheel:

Andrew

[Author]

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