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Tungsten Alloy

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Michael Gilligan29/11/2018 19:41:11
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Posted by duncan webster on 29/11/2018 11:51:49:

Thanks Michael, at that price which I'm sure is typical, I'll stick to monel which I've had for 40 years. Originally part of an electrolysis cell I think, bought for peanuts in club auction.

.

This may put that price into perspective, Duncan **LINK**

https://www.ebay.co.uk/itm/LOT-13-GRAMS-TUNGSTEN-90-HEAVY-ALLOY-METAL-PIECES-AS-IS-BIN-Y7-H-03/253973717776

... Your use of Monel metal is probably wise.

MichaelG.

Phil H129/11/2018 20:45:27
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Would opening out the back of the wheel more reduce the size of the counter weight and lighten the opposite side at the same time?

Would that help?

Phil H

Michael Gilligan29/11/2018 20:47:24
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Posted by Michael Gilligan on 29/11/2018 19:41:11:

... Your use of Monel metal is probably wise.

.

dont know ... I've just looked at the density of Monel; and have changed my mind.

MichaelG.

Benjamin Day29/11/2018 21:32:11
49 forum posts
A while ago I came across a material that was rods of titanium cast into copper (I think!) The guy was machining it and etching it to make unusual jewlery pieces, anyway would this kind of method work at all? A number of smaller rods brazed together, then cast into aluminium or copper, which could be turned?
Ben.
Neil Wyatt29/11/2018 21:47:25
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What about silver? The scrap rate for sterling silver is only about 28p/gram and you can mould it with minimal waste.

duncan webster29/11/2018 23:18:20
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Neil,

do you think I'm made of money? each one has a volume of 4804mm^3 which is 50 gms, £14, by the time I've allowed for machining that's going to be £20 each, £80 total. It's only 20% more dense than brass. You must have forgotten I'm from Yorkshire.

Comparing the Alibre model wit the real thing I realised that I had erred on the crankpins, so tonight's job was some precision application of the 2lb hammer to get the crankpins out and make some new ones from EN8. Good stuff this 3D modelling!

I ought to point out that the wheels are loctited to the axles, and the quartering is bang on, so I'm not inclined to take them off! Machining holes is possible I think using the horizontal spindle of the milling machine or even clamping them down on the lathe saddle, any profiling would be a lot more difficult.

 

 

 

Edited By duncan webster on 29/11/2018 23:26:24

Jeff Dayman30/11/2018 02:00:54
1563 forum posts
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I guess I won't suggest 22 g/cm^3 Iridium then, at $45000 / kg or 19.3 g/cm^3 gold at $36000 / kg.....

Google is wonderful, isn't it?

19.3 g/cm^3 Tungsten or 11.3 g/cm^3 lead might be in the Yorkshire style budget!

(the lead is what would be in my budget......maybe I had ancient ancestors from Yorkshire)

Edited By Jeff Dayman on 30/11/2018 02:01:25

Edited By Jeff Dayman on 30/11/2018 02:02:11

David George 130/11/2018 20:13:49
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You could try tungsten Copper electrode material for spark erosion www.edm-consumables/edm-electrodes/cutg-bar.h for example other company's on internet.

David

vintage engineer30/11/2018 20:26:33
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146 forum posts

F1 used to use mallory metal for crankshaft balance weights but now they use incapsulated DU.

Nathan Sharpe30/11/2018 21:25:46
130 forum posts

Duncan, have you thought of Tungsten darts as your material source? Wrong shape but prices are low. With your skills you could find a workround? nathan.

Roderick Jenkins13/12/2018 16:30:22
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I've just received a lump of copper tungsten alloy from here **LINK**

Took a couple of weeks to arrive. I calculate the density of my piece at 15.5. This is the only source I have found for small quantities at a "reasonable" price.

Rod

not done it yet13/12/2018 20:16:38
3165 forum posts
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Rod, unless there is a change in volume from the separate components, it would appear to be nearer 65/35 W/Cu. Lower down they quote 13.8g/cm^3 and indicate it as 70/30 Cu/W product. So it may be pot luck what actual density one might receive! So much for chinese products?

Niels Abildgaard14/12/2018 05:40:23
228 forum posts
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Used carbide end-mills can be wire- sparked into strange forms and the scrap price is ca 10£ per kg.

Density is around 14.5

Edited By Niels Abildgaard on 14/12/2018 05:41:03

Neil Wyatt14/12/2018 16:39:02
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Take care with the dust from machining tungsten.

Neil

mechman4815/12/2018 12:54:26
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And does anyone know why when I press return on this site the cursor goes back to the start of the document, not to the next line? I have to press shift/return...

I have the same issue... doesn't happen on other forums, e mails, word docs, et al, just on this site dont know

George.

not done it yet15/12/2018 13:38:50
3165 forum posts
11 photos

Me, too.

I’m using an Ipad pro. Must try on my newly acquired old laptop. Logging in might be easier, too. The only site where it won’t load a saved password.

Martin Connelly21/12/2018 14:22:31
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Duncan, did this get resolved? Tidying up I've just found a piece of tungsten copper 1/2" x 1" x 4" long that I found in a scrap bin at work some years ago. Kitchen scales say it's about 460g which works out to a density of about 14g/cc. Some shallow grooves on one side and some 3.5 dia holes about 3 deep on the other but plenty of usable material.

Martin C

ega21/12/2018 14:30:19
1216 forum posts
101 photos
Posted by Niels Abildgaard on 14/12/2018 05:40:23:

Used carbide end-mills can be wire- sparked into strange forms and the scrap price is ca 10£ per kg.

Density is around 14.5

Edited By Niels Abildgaard on 14/12/2018 05:41:03

I think the point may have been covered before but is there any convenient way today to re-cycle worn out or broken inserts?

I shall never have a kilo of these but a mickle and a mickle makes a muckle!

Niels Abildgaard21/12/2018 16:57:47
228 forum posts
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Posted by ega on 21/12/2018 14:30:19:
 

I think the point may have been covered before but is there any convenient way today to re-cycle worn out or broken inserts?

I shall never have a kilo of these but a mickle and a mickle makes a muckle!

 

Please do not dispose it with your scrap steel.

Present crap steel made from scrap is lousy enough.

Edited By Niels Abildgaard on 21/12/2018 17:17:39

Edited By Niels Abildgaard on 21/12/2018 17:17:57

Michael Gilligan21/12/2018 17:42:56
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Posted by ega on 21/12/2018 14:30:19:

I think the point may have been covered before but is there any convenient way today to re-cycle worn out or broken inserts?

.

Realistically, I think the only thing we can do is grind them into smaller tool-bits.

The bulk dealers, however, can do something with them : **LINK**

https://www.mscdirect.com/betterMRO/metalworking/carbide-recycling

MichaelG.

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