diffrence between 3003 alloy, and 7075 t6??

[whitrzac]

after waiting a week on some 7075 t6, WI metals said that they couldn't get it in, so there sending some 3003(all the info I was given) in the same size/thickness. they say that its close to the 7075, but IDK if its enough...


its going to be a chassis/motor plate/etc for my jato and e-maxx

if not, does someone have a 14"x 5"x1/8(or 3mm)+extras for the motor mount, sheet of 6061/7075 they could sell me??

[Takedown]

Originally Posted by whitrzac

after waiting a week on some 7075 t6, WI metals said that they couldn't get it in, so there sending some 3003(all the info I was given) in the same size/thickness. they say that its close to the 7075, but IDK if its enough...


its going to be a chassis/motor plate/etc for my jato and e-maxx

if not, does someone have a 14"x 5"x1/8(or 3mm)+extras for the motor mount, sheet of 6061/7075 they could sell me??

7075 is more solid/rigid and overall alot better material.

[whitrzac]

Originally Posted by Takedown

7075 is more solid/rigid and overall alot better material.

but will it work??

maybe some 90* bends on the sides??

[suicideneil]

Ya know, theres this awesome website where you can find lots of info really quicky, its called GOOGLE!!!!!!!!!

An awful lot quicker to search for something like 'aluminum properties' or 'aluminum grades' than posting on a fourm and then waiting several hours for a responce; most if not all decent aluminum r/c parts are made from either 6061 or 7075m since they have the best properties for the intended use- gander at the info I found if you please:

http://en.wikipedia.org/wiki/Aluminium_alloy

you will probably need to read this to make more sense of the info on work hardening:

http://en.wikipedia.org/wiki/Work_hardened

Toodles....

They don't give you enough info - which grade of 3003?? Offhand, I wouldn't be accepting it, specs I've looked at, its much weaker than even 6061.

Have you looked at onlinemetals.com? They show 7075T6 plate in 1/8" in var sizes and it looks like its in stock.

[whitrzac]

Originally Posted by suicideneil

Ya know, theres this awesome website where you can find lots of info really quicky, its called GOOGLE!!!!!!!!!

An awful lot quicker to search for something like 'aluminum properties' or 'aluminum grades' than posting on a fourm and then waiting several hours for a responce; most if not all decent aluminum r/c parts are made from either 6061 or 7075m since they have the best properties for the intended use- gander at the info I found if you please:

http://en.wikipedia.org/wiki/Aluminium_alloy

you will probably need to read this to make more sense of the info on work hardening:

http://en.wikipedia.org/wiki/Work_hardened

Toodles....

I did google it, I got that it was about 1/2 has strong as 7075, but I wanted to know if it would work, or I needed to get somthing else

TY for the link to onlinemetals.com

[BrianG]

For a Jato, it *might* be ok depending how it was designed and the size/weight of the motor. But for all the work required to make the mounts, I would do it right the first time with the proper material. Can you send back that 3003 stuff, get a refund, and order from onlineMetals.com?

And, why would a place send something else that is not even close to what your ordered? It would be like me going to a Honda dealership to get a Civic, and they give me a Kia Rio instead because they don't have any Civics in stock. Sounds like a crappy place to me...

[JThiessen]

3003 has very similar properties to 6061, except that with the addition of manganese, it has really good corosion resistance. Often used in marine applications. Not as strong as 7075, so likely the initial failures could be stripped threads.

[ZippyBasher]

http://www.onlinemetals.com/aluminumguide.cfm

here is goes into detail on the different types of AL. Also this site sells 7075-t6 as well as much other materials.

I have some 7075-t6 2mm sheet arriving tomorrow from OLM.

[suicideneil]

On the 'work' front, any metal would work, even a sheet of 1mm thick steel if you cut and bent it into shape, it would just flex like paper and strip/ tear easily, hence the recommendation to only go with the decent grades that r/c applications normally use- 6061 and higher (I've used 6063 before and it worked great).

[whitrzac]

the welding teacher said that they that they would use the 3003, so as long I have it I might as well make a few prototypes before the 7075 gets here....


the motor mount plate would be basid on the e-maxx one...

[BrianG]

FYI: I've used angle 6061-T6 angle stock (~4mm thick) from onlinemetals.com in my Jato, 4-tec, and CRT.5 and it holds up great. The motors in these are short so there isn't much weight hanging far out from the mounting area, so the lesser metal works fine. Also, I position the motor such that it is as close to the angle as possible for added strength. In larger vehicles where a longer/heavier motor is used, I would either use thicker 6061 or a little thinner 7075 as a minimum. I chose 6061 since it is easier to work on, but not so soft that it doesn't work well in the application. Just depends on what you plan to do with it.

[whitrzac]

the motor mount is mounted on the 2 screws behind the spur gear, and mesh is adjusted like any 1/10 elc. truck....


soo this or this will work, corect?

and now the question of the day... is the 7075 worth twice as much??

[JThiessen]

If you intend to bend or weld it, 7075 will not work, it is too "brittle" for bending, and does not reset into a stable material after welding.
For machining, 6061 is a bit nicer for the machinst, but 7075 works fine as well. Generally speaking, for our applications in RC, a plate of 6061 will be just as good as a plate of 7075 - unless you just happen to choose a thickness that is right on the edge strength wise. If you are tapping holes, then you will start to see a greater difference over time. When you get into designed NC machined parts, then you will also start to see a difference in material properties popping up. So in a nut shell, don't sweat it.

[whitrzac]

I plan on 2 ~20* bends in the chassis, like most plate chassis...

no welds

so, I'll get the 6061..


the tech ed teacher wants to cut it out with the "shop bot" CNC router...