Re: Weighing Freight Car Models with Liquid Gravity

Peter Ness
 

Jake wrote:

W is often the cheapest you can get per meter, as it pulls very fine without breaking.  (For $170, you can get 0.0005" electropolished wire in 500m spools) 

 

Which is true, but try putting a 90° bend in it and it will become apparent it is very brittle unless doped with other elements in alloy form. Tungsten wire splits during attempts to form it. Doped with rare-earth oxides such as Lanthanum oxide allow easier forming such as to make coils for various lighting products.

 

Again, always know what you want if for and what it’s made of.

 

On the Hevi-Shot page the description reads; “Hevi-Shot is a non-toxic shot comprised of tungsten alloy, nickel, and iron that is similar in density to lead”. So it may be only USD80, but what does it cost for 3 lbs. of Lead?

 

Peter Ness

 

From: main@RealSTMFC.groups.io [mailto:main@RealSTMFC.groups.io] On Behalf Of Jake Schaible
Sent: Monday, October 29, 2018 5:34 PM
To: main@RealSTMFC.groups.io
Subject: Re: [RealSTMFC] Weighing Freight Car Models with Liquid Gravity

 

There is a commercially available Tungsten alloy shot, formed to have similar density as lead... without the lead.... for lead free states.

Hevi-Shot Tungsten Alloy Shot 3 lb
$80 / 3lbs.

Also http://www.globaltungstens.com/tungsten-alloy/tungsten-shot.php

Pure W isn't all that hard.  Even with the harder alloys, there are specialist shops that work with it 90WNiFe alloy and can mill and cut that fine. 

In fact, for extremely small dia wire, W is often the cheapest you can get per meter, as it pulls very fine without breaking.  (For $170, you can get 0.0005" electropolished wire in 500m spools)  

https://midwesttungsten.com/tungsten-wire-99-95-pure-0-003-diameters-500-meter-spool/

 

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