I'm not sure i would agree that the post needs to be pulled, but it does bear careful thought. that's a 1" piece of rebar firing .22LR: a small diameter low pressure cartridge if there ever was one. You certainly wouldn't want to do that with higher pressure cartridges. The minimum yield strength of rebar in the US is 60,000 PSI, and the fact that the chamber portion is encircled with the high grade steel of that Yost action is even more of a safety factor.
Let's not get carried away with concern, eh?
All said, this is a very cool application, and there have been a multitude of rebar projects from all over!
Last edited by Howder1951; 08-22-2019 at 10:49 AM.
While in Kuwait I had my own QA&QC department with testing facilities in the factory that I had built to my specs by our own staff. the Head office was forever getting requests by our much larger competitors to do 3rd party testing since we had a letter of approval as a testing lab from the ministry of building and construction.
All too frequently my engineers would have to tell those companies engineers that whole batches of sequential lot numbers of materials would have to be rejected. or used only in specific non structurally demanding areas.
There has been many uses of odd materials and like Frank it is a go to metal and bed frames. Something we are overlooking is the man that did the rifle barrel is in Sweden. There metal might be of better quality than ours. And if he is a gunsmith, he might have done a good heat treat that could have brought the stress factors up. I do not think it would be my choice but interesting the same.
Most newer fed frames are made from hot rolled sheets then sheared and formed
Pretty easy to spot the ones that may have ball bearings in the steel because at the break in the metal you will spot tiny little stress cracks once in a while.
It is the older mill formed frames that look like actual angle iron that are the real mystery metals. you might start to drill a hole and not even a cobalt bit can penetrate all the way through but move as little as half an inch and a bargain counter bit that will bend before breaking will drill through like drilling a hole in a tin can.
Have a band-saw that you don't like the blade that is in it toss an old bed frame in it then try and make the cut all the way through while still having enough teeth on the blade to recognize.
I've even seen them glaze over a disk in a chop saw.
As far as the rifle barrel goes due to it being a full bull barrel bored for .22 ammo I wouldn't worry much about that.
Yes there are folks trying to build a gun or rifle barrel who have no business doing so. Anyone who does not understand the effects of combustion pressures of a given caliber has absolutely no business attempting to manufacture a fire arm.
We had a young man on HMT.Net a few years back who was wanting to build a M6 Scout. a very simple little survival weapon that anyone with "MEDIUM" gunsmithing skills should be able to make, as long as they also possess some knowledge in the many different types of metals there are out there GALVANIZED water pipe is NOT one of the accepted mediums to make a .410 shotgun barrel out of.
Fortunately he posted some pictures of some pipe fittings he had tried to weld together and without shaming him too badly the members of theses forums managed to empress upon him that he needed to acquire some better skills before even considering such a build. Sadly though he left before we were able to help him much more than that.
I'm not a gunsmith don't claim to be and have never played one on TV but I have bought dozens of non operational guns over the years and repair them to safely fire their intended ammunition and yes I often have to make my own parts sometimes by having a blank piece of stock or a freshly machined part clamped in a vice and file away with jewelers files with a loop over my eyes to get the part just right. I've never had a repair to go bad but I don't use mystery metals in making those parts either, I don't take chances when it comes to working on fire arms.
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