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| I believe they used to use recycled Hofbrau cans but that may no longer be the case . My guess now would be milled 7075. |
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Just because you can, doesn't mean you should
| T6 is the heat treatment/hardness, not an alloy. Most likely it's 7075.
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| Nobody knows but Sig and they are unlikely to tell you. I have been to the factory and as others noted its raw form is bar stock. If I had to guess as have others its 7075T6. But its just a guess. As for its life versus stainless I guess it depends on what is the issue of durability? It will certainly be worn more by use (mitigated by lube) than stainless. I doubt you will wear out a pseries sig. but if the extra weight doesn't bother you then a stainless one will likely have less potential issues.
“So in war, the way is to avoid what is strong, and strike at what is weak.”
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| again no one can actually know unless SIG were to say. But the odd's its a forging are just low. It would have no real value in this actual application. the stresses on a Sig PSeries lower are incredibly low in alloy terms. I would not pay for it.
“So in war, the way is to avoid what is strong, and strike at what is weak.”
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7.62mm Crusader
| quote: Originally posted by perrinyanna: Is it from a forged 7075 aluminum blocks or just machined from solid block of aluminum billet....?
Slabbed from bar stock by a saw. Pics were posted maybe a year back. |
| Posts: 18018 | Location: The Bluegrass State! | Registered: December 23, 2008 |
IP
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Chilihead and Barbeque Aficionado
| Here's a pic I took of some P series frame blanks just before going into the CNC machine, at the Exeter plant about 10 years ago. No idea what type of alloy it is. After machining.
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The Second Amendment is not about hunting or sport shooting.
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| quote: Originally posted by perrinyanna: Is it forged T6 alloy like in the lower receivers of AR rifles? Or is it Dural(aircraft aluminum)? Or is there such a thing as alloy casting? Thanks! How does it stand to in durability compared to an all stainless framed P series?
7075-T6 is "aircraft aluminum." More common "aircraft alloys" are 2024-T3, and 6061-T6. Both are not appropriate for a firearms receiver. 7075 has far better properties, given adequate heat treatment. 7075 is more susceptible to work hardening and intergranular corrosion, however. |
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