Grade of alu for axe?

[Eventorizon]

It depends what you want, both will work just fine. Hardox is the easier and probably cheaper option in the long run and will be more durable. but the Alu weapon would look cooler. Its up to you. The Alu wont be able to puncture any armour but it will allow you to bludgeon repeatedly, where as you can get a sharp Hardox weapon and look to be making holes in your opponent.

While this is more based on the power of the weapons it will give you an idea - Killer joule has an Alu arm and Alu head and hits like a beast, so much so it was able to OOTA itself! Hatchet has a Hardox axe and is able to make dents in Titanium. Our own axe, Mattock, has a 3Lb mattock mini pick axe and that will go through 10mm of HDPE and crack Ti.

[Graw]

I was considering interchangable heads, so I could have the bludgeoning hammer made up from alu and a more THZ shaped axe head made up from hardox (I could use a nice thick piece of hardox since the alu head will weigh around 1.5kg I'll have that much weight to play with). It would be decent that I could change them around as per which is more suitable for who im up against.

You're right about the alu looking cooler, I've seen killer joule and tbh its one of my main inspirations behind my build - such a cool machine. Does the pick axe shape end up getting stuck in armour alot? Going through 10mm of HDPE is pretty impressive, got any pics of the robot?

Edit : http://www.ebay.co.uk/itm/10mm-RAEX-...5a1e-NLMfLDPNA

Good grade for what I need?