Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 52 users online :: 4 registered, 0 hidden and 48 guests


Most users ever online was 155 on Mon Aug 15, 2016 1:40 am

Registered users: Bing [Bot], Google [Bot], MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

Steel pipe questions

Post about things you have launched or thought about launching. Also post about various materials used for building cannons. No posts about explosive projectiles!
Sponsored 
  • Author
    Message

Unread postAuthor: Slauma » Tue Feb 16, 2010 11:20 pm

If a weld is done is it possible to re-temper the entire piece? If you bring it to the right temperature and hold it there it will anneal right? How hard would that be to do?
  • 0


Slauma
Specialist
Specialist
 
Posts: 46
Joined: Sun Dec 20, 2009 12:28 pm
Reputation: 0

Unread postAuthor: Moonbogg » Wed Feb 17, 2010 1:18 am

Slauma wrote:If a weld is done is it possible to re-temper the entire piece? If you bring it to the right temperature and hold it there it will anneal right? How hard would that be to do?


I did that with a cannon made of aluminum. Using 4043 filler rod is common for post weld heat treatment. This rod anodizes to a jet black color, so if your part is anodized, the rod may stand out, but its a small price to pay to regain tensile properties lost during the weld process. I read somewhere it is not guaranteed to regain 100% of the base metals strength, although much of it will be regained. So make sure your safety factor is as high as possible.
  • 0

User avatar
Moonbogg
Major General
Major General
 
Posts: 1375
Joined: Mon Oct 13, 2008 10:20 pm
Location: whittier, CA USA
Reputation: 0

Unread postAuthor: jhalek90 » Wed Feb 24, 2010 5:28 pm

Umm.... schedule 40 steel thats only rated to 400 psi????
WHAT?

My pneumatic steel 1'' valve has been used at like... 850. (CO2)
But than again... that is only 1'' 2" would be considerably weaker assuming the same wall thickness.

On a side note, they do rate the pipes and fitting on the low side. i would not put a steel fitting being pushed past its rating by MY face... but you would also probabbly be fine if you overshoot the pressure rating by a tiny amount, not alot... but a little should be okay. If your comfortable with that.

And again... i have very little experience with combustion cannons...im talking from pneumatic experience .
  • 0

jackssmirkingrevenge wrote:I wonder... if you put flammable vapours inside a lady... could you get her to diesel?

POLAND_SPUD wrote:Anything is possible with the proper 3-way valve.
User avatar
jhalek90
Lieutenant Colonel
Lieutenant Colonel
 
Posts: 498
Joined: Fri Aug 14, 2009 5:37 pm
Reputation: 0

Previous

Return to Construction Materials/Ammo Discussion

Who is online

Registered users: Bing [Bot], Google [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'