Tungsten Alloy Billets

What is Tungsten Alloy Billet

Today's standard material for barrel is tungsten heavy alloy, and barrel forms the main part of a dart (mainly used in sports). Tungsten has a specific gravity of 19.3(20℃), so it is a very dense material. For its special properties, nowadays tungsten is widely applied to make darts replacing brass. Because of technical difficulties with manufacturing, a 100% tungsten dart is not available. All "tungsten" darts you can buy are in fact made of tungsten heavy alloys.

Tungsten Alloy Billet from Chinatungsten

Tungsten Alloy Billet

We could supply tungsten alloy billet by various sizes and contents, popularly 70~90% tungsten is used for making both soft-tip and steel tip barrels, ranging from 14~18 gram and 18~40 gram respectively, and sometimes, 65% and 95~97% tungsten are offered following customers’ specific request.
Here below you could find a list for Standard tungsten dart billets.

Tungsten Alloy Billet Sizes

Tungsten Alloy Billet Size
       [?(+0.05)×(+1.0)mm]
Content of W (%)
65 70 80 85 90 95
Density (+/-0.25g/cc)
13.20 13.90 15.40 16.00 16.90 18.00
No. inch mm Weight (+/-0.50g/pc)
1 ?1/4×1.7 ?6.35×43.2          

 

2 ?1/4×1.8 ?6.35×45.7            
3 ?1/4×1.9 ?6.35×48.3            
4 ?1/4×2.00 ?6.35×50.8            
5 ?1/4×2.15 ?6.35×54.6            
6 ?0.265×1.7 ?6.73×43.2            
7 ?0.265×1.8 ?6.73×45.7            
8 ?0.265×1.9 ?6.73×48.3            
9 ?0.265×2.00 ?6.73×50.8            
10 ?0.265×2.15 ?6.73×54.6            
11 ?9/32×1.6 ?7.15×40.7            
12 ?9/32×1.7 ?7.15×43.2            
13 ?9/32×1.8 ?7.15×45.7            
14 ?9/32×1.9 ?7.15×48.3            
15 ?9/32×2.00 ?7.15×50.8            
16 ?9/32×2.15 ?7.15×54.6            
17 ?5/16×1.6 ?7.94×40.7            
18 ?5/16×1.7 ?7.94×43.2            
19 ?5/16×1.8 ?7.94×45.7            
20 ?5/16×1.9 ?7.94×48.3            
21 ?5/16×2.00 ?7.94×50.8            
22 ?11/32×1.4 ?8.74×35.6            
23 ?11/32×1.6 ?8.74×40.7            
24 ?11/32×1.8 ?8.74×45.7            
25 ?11/32×2.00 ?8.74×50.8            

Billets are actually tungsten cylinder rods after surface grinding by center-less processing, and their weights are varied from different tungsten contents and rod sizes. Tungsten alloy billet relates to a process for producing fully dense tungsten alloy billets by sintering loose filled beds or the powder blend. Tungsten heavy alloy sheet can be produced by rolling sintered billets of the alloy.

Because the rolling requires numerous anneals, it is desirable that the starting billet be no more than about twice the final thickness. One method to produce tungsten alloy billets is by isostatically pressing the powder alloy blends and sintering them to full density. With thin billets, it is difficult to get a uniform fill of the mold so the resulting billets are not uniform in thickness. There is also a problem with breakage with the thin billets. By this method it is not possible to produce tungsten alloy billets with a surface area to thickness ratio much over 600 or thicknesses less than about 0.5". A similar method is to press large billets and cut the green billet into thin slabs. While this produces billets of uniform thickness, it has the size limitations of the previous method and there is the added expense of cutting.

So if you have any interest in tungsten alloy billet, please feel free to email us: sales@chinatungsten.com, sales@xiamentungsten.com or call us by: 0086 592 512 9696, 0086 592 512 9595. We are at your service.

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