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PostPosted: Thu Aug 15, 2013 10:48 am 
Retro Guru
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Joined: Sat Jan 22, 2011 11:22 pm
Posts: 358
Location: London
Not all 7005 gets post heat treatment. In fact, its probably only the boutique homegrown stuff that does, since 7005 will naturally age harden at room temperature over the course of about 30 days, or, approximately the journey time from the Far East to the UK/USA.

6061 will also age harden, but you can leave that at room temperature for a decade and it still won't reach T6 temper, Hence all 6061 frames require post weld heat treatment to harden the material up. 7005 takes a lot longer to anneal (soften) than 6061 when heated, far longer than this little weld will take, so a weld repair promptly completed and then left in a cupboard for a month to reharden will be fine. If the frame has sentimental value, then go for it. Get the crack drilled to prevent further propogation, ground out and welded up with the right filler wire, and it'll be good as new.


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PostPosted: Thu Aug 15, 2013 2:28 pm 
Retro Guru
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Joined: Mon Jan 02, 2012 10:04 pm
Posts: 660
Location: cornwall
Saracen didn't heattreat Mantras AFAIK.
Didn't spot thatvyou were in cornwall Wafers! Whereabouts are you? I work in a fabrication and precision engineering shop!


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PostPosted: Thu Aug 15, 2013 2:46 pm 
Dirt Disciple

Joined: Wed Nov 14, 2012 8:00 pm
Posts: 27
Location: Cornwall
bren wrote:
Saracen didn't heattreat Mantras AFAIK.
Didn't spot thatvyou were in cornwall Wafers! Whereabouts are you? I work in a fabrication and precision engineering shop!


I'm in St Austell. Interested in a little project?!


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PostPosted: Thu Aug 15, 2013 6:18 pm 
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Joined: Mon Jan 02, 2012 10:04 pm
Posts: 660
Location: cornwall
My workshops in Redruth but I'd be happy to take it on if you can get the frame and headset up to me?


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PostPosted: Thu Aug 15, 2013 9:16 pm 
Dirt Disciple

Joined: Wed Nov 14, 2012 8:00 pm
Posts: 27
Location: Cornwall
bren wrote:
My workshops in Redruth but I'd be happy to take it on if you can get the frame and headset up to me?

After chatting with my bro this evening, looks like I may now have someone local who could sort this. Will definitely keep you in mind if it doesn't work out though. Cheers!


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