This is what happens
- Thread starter oli700
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I made a set of mud flaps from T6 aluminum sheet, and it's very hard to cut with high speed steel tools.
T5 aluminum, which is best used for Windows and Doors is about 1/3 as hard to cut.
For common alloys, the temper of the metal can make much more difference than the alloy (6065, 7075...whatever) just like Steel.
T6 aluminum has a special Heating and quenching requirement which makes it very hard
Caddmann, most AR lowers these days are 7075 T6 chosen for it's strength and hardness.
In the past, there have been a myriad of other types of materials. 6061-T6, magnesium, various grades of cast, forged, and billet machined aluminum, and polymers/carbon fibers. A Titanium or two. These are just off of the top of my head.
In the past, there have been a myriad of other types of materials. 6061-T6, magnesium, various grades of cast, forged, and billet machined aluminum, and polymers/carbon fibers. A Titanium or two. These are just off of the top of my head.
From Total Materia:
"Aluminum alloys that contain appreciable amounts of soluble alloying elements, primarily copper, magnesium, silicon, and zinc, are susceptible to stress-corrosion cracking (SCC).
An extensive failure analysis shows how many service failures occurred in the industry and what kind of alloys and stresses led to initiation and propagation of stress corrosion cracks which caused these service failures. Alloys 7079-T6, 7075 –T6 and 2024 – T3 contributed to more than 90% of the service failures of all high-strength aluminum alloys..."
"Aluminum alloys that contain appreciable amounts of soluble alloying elements, primarily copper, magnesium, silicon, and zinc, are susceptible to stress-corrosion cracking (SCC).
An extensive failure analysis shows how many service failures occurred in the industry and what kind of alloys and stresses led to initiation and propagation of stress corrosion cracks which caused these service failures. Alloys 7079-T6, 7075 –T6 and 2024 – T3 contributed to more than 90% of the service failures of all high-strength aluminum alloys..."
They let me test fire one of the builds in their "snail". 
While there is something about blued steel, the fact is, there are a lot of aluminum receivered guns out there.
From 22lr single shots, to pistols to rifles of virtually all calibers, and even shotgun receivers. Aluminum is corrosion resistant, light, and relatively plenty strong and durable for most firearm applications.
your going to want to watch this thread then
that would be interesting, but no
I think I know your taste in guns by now....... think 1860's
you got it.....going to take a while but yep
Red Brass....."riflebrass"
a Yellowboy AR15
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I can scrape by on the machining side but have spent a lot of time on the design side of things. Here's what a 3d model of a lower looks like and I added some custom wording for the selector.
