HSS is great for Aluminum. Carbide is good for wood and various other materials. As stated from: http://www.brighthubengineering.com/manufacturing-technology/49448-high-speed-steel-versus-carbide-in-metal-cutting-why-hss-is-still-in-use/

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“The advantage of HSS over carbide is its strength to withstand cutting forces and the low cost of the tools. From the tool life point of view, HSS performs very well at intermittent cutting applications. But the greatest limitation of HSS is that its usable cutting speed range is far lower when compared to Carbide.”

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I also buy almost exclusively carbide bits. I think one of the main advantages of HSS over carbide are overall strength and cost (debatable).

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Is it just a price thing in case it breakes or is there actually a material that would benefit from using HSS over a Solid Carbide Bit?

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HSS can also be sharper, at least when new. For projects which you want an especially nice / crisp finish, it may be worth using a new sharp HSS endmill for the finishing pass, after roughing with a carbide.

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