Welding a moderator

[Tim.243]

Silver solder and braze,,,,,,,,,on a part that could be subject to 30,000 psi.........(at the muzzle / 65,000 psi at the chamber)


Question the thought process behind that...


Firearms pressure are way above and beyond steam engine / model engineering builds.


If the moderator is defective, replace it.


Simply isnt worth the risk otherwise

Luv to keep stuff going, ... I reiterate, Bronze welds go up to 70,000 p.s.i.

OH, & funny how a barrel starts off soooo big, then that lidddle biddy thin bit down the end, with that great big spacious can on the end., .. come on Tim!

All ways happy to oblige....know what were the figures quoted in post 14....
Silver solder and braze,,,,,,,,,on a part that could be subject to 30,000 psi.........(at the muzzle / 65,000 psi at the chamber)

Min 0.41 is that flux and bronze.........??? ....blow me down at 1.51 call the solder police quick.....



Tim.243

 

[Alantoo]

I cannot believe a moderator repair keeping tons of pressure in could be compared with a tyre keeping 30psi inside.

That is the trouble with analogies...people often take them the wrong way!

Alan

 

[tackb]

All ways happy to oblige....know what were the figures quoted in post 14....
Silver solder and braze,,,,,,,,,on a part that could be subject to 30,000 psi.........(at the muzzle / 65,000 psi at the chamber)

Min 0.41 is that flux and bronze.........??? ....blow me down at 1.51 call the solder police quick.....



Tim.243

at what time was the solder being used to seal a pressure bearing part , I missed it ?

I saw it being use to join two pressure bearing parts and attach a rib but no sealing of a pressure bearing part?

 

[finnbear270]

Been dying to use this!

 

[finnbear270]

at what time was the solder being used to seal a pressure bearing part , I missed it ?

I saw it being use to join two pressure bearing parts and attach a rib but no sealing of a pressure bearing part?

How do you seal a moderator?,Mr bullet wouldn't be able to get out

 

[finnbear270]

Why will an oil filter stand being used as a moderator?,& crimped not welded, .22 LR @ 25,000 p.s.i.

 

[Hornet 6]

Something nobody has added yet, so I will.
There is a hole, the inside of the can is filthy, you will never get it clean, it needs to be clean for a good weld.
If it is going to be tig bronzed or even silver soldered in needs to spotless, inside and out.
So tell me how you would get it that clean in and out, then we can discuss welding it, as said before i'd bib it and get another.
But welded properly it would be strong enough, if you get it clean, not forgetting the cost of the inspection equipment that can clearly show the inside of the hole.

Neil.

 

[finnbear270]

Something nobody has added yet, so I will.
There is a hole, the inside of the can is filthy, you will never get it clean, it needs to be clean for a good weld.
If it is going to be tig bronzed or even silver soldered in needs to spotless, inside and out.
So tell me how you would get it that clean in and out, then we can discuss welding it, as said before i'd bib it and get another.
But welded properly it would be strong enough, if you get it clean, not forgetting the cost of the inspection equipment that can clearly show the inside of the hole.

Neil.

Ultrasound, ...................... Carry on!

 

[tackb]

Ultrasound, ...................... Carry on!

does ultrasound remove corrosion ? (genuine question!)

 

[tackb]

How do you seal a moderator?,Mr bullet wouldn't be able to get out

oh it'll get out don't worry !

 

[finnbear270]

does ultrasound remove corrosion ? (genuine question!)

No, but it can be excised by a good arc!

 

[Hornet 6]

Ultrasound, ...................... Carry on!

Thanks, so it's ok if I pop round and use yours, the one you keep next to the tig welder in your garden shed

 

[tackb]

No, but it can be excised by a good arc!

I doubt the mod will stand that kind of arc !

I have an answer anyway , machine a tube to exactly fit over the mod then heat it up whilst freezing the moderator then pop them together and let thermal dynamics do it's thing , hey presto a no weld solution !

 

[finnbear270]

Thanks, so it's ok if I pop round and use yours, the one you keep next to the tig welder in your garden shed

My T.I.G. is no more, Overworked it on some two inch thick ally. I'm no longer wearing my Kromer, as I'm going back into full time employ this Monday, so I'll be leaving you lot to play on your own for a bit!

 

[Alantoo]

I doubt the mod will stand that kind of arc !

I have an answer anyway , machine a tube to exactly fit over the mod then heat it up whilst freezing the moderator then pop them together and let thermal dynamics do it's thing , hey presto a no weld solution !

Good idea! At least that way when the rest of poor weld finally gives up you will have a proto barrel to guide the bits and keep them in line with the POA.

Mr Lawrence told me I would destroy one of his Titanium moderators if I cleaned it with Ultrasound. The only reason I could find was hydrogen embrittlement...

Alan

 

[finnbear270]

A buddy just let me know he had the very same mod , with the very same fault as shown in the pic, ... only difference was his was a fault times three, he reckons they are welded in opposing tack runs, NOT, fully welded all way around circumference.

 

[Alantoo]

A buddy just let me know he had the very same mod , with the very same fault as shown in the pic, ... only difference was his was a fault times three, he reckons they are welded in opposing tack runs, NOT, fully welded all way around circumference.

That would accord with the different bead segments in photo the OP posted.

Alan

 

[bish789]

Well ladies and gentlemen, an update.
On Monday I rang Peter at Jackson Rifles the ASE importer and explained the situation with my mod.
Peter was absolutely brilliant, and immediately offered me a replacement even knowing how old the mod was, just from my description.
He told me to send my mod up, and as soon as he'd had a look at it he would send the replacement out.
He asked me which version of the new Jet Z lineup I would like, explained the differences, and issued me with a returns number.
I duly sent the mod up (Royal Mail missing their guaranteed target by 2 days), and this morning I received my replacement mod.
This is first class service, and I cannot express my thanks enough to Peter and Janet for making this a seamless and painless transaction.
Hats off to Jackson Rifles, they get 10 out of 10 from me.
BTW, Peter is actually a Chartered Engineer, he knows what he's talking about.

 

[1kevb]

I have dealt with Peter for well over 10 years and always have had stunning service and advice.

 

[Haloed']

Well that result blows tackb's moan right out of the window???