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McMaster has 4 types.....Seems they are reasonably priced at about $17 for a 6" peice at .2" diameter. But if he's making darts I imagine he could go much smaller, which makes the price cheaper.
Never machined it though.
Material
Grade C-1/C-2 Tungsten Carbide: Balls are harder and more abrasion resistant than chrome steel or carbon steel balls. Hardness is Rockwell A 92, with Grade 25 tolerances.
Grade EMT210 Tungsten Carbide: Features good hardness and abrasion resistance.
Tungsten-Carbide: This material features an excellent combination of hardness and transverse rupture strength which eliminates edge breakdown and premature wear. This premium-quality micrograin carbide has a 10 cobalt content.
High-Density Tungsten Alloy: Also known as chatter-free tungsten, this high-strength material has a 90 percent tungsten, 6 percent nickel, and 4 percent copper content.
Good luck trying to turn darts from it though........
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