It's actually a metal alloy similar to solder, not sure exactly what it it though. This is precisely the reason if you've ever taken a welding class at a trade school or community college for instance, one of the things you're taught is to never use boiling water to thaw a frozen valve or free a cylinder frozen to the ground since you could either melt safety plug or soften it enough to leak, and some cylinders, particularly larger acetylene cylinders, have a safety plug at the bottom as well as the valve assembly.

That makes more sense with the alloy. Thanks.

helium is lighter than air, argon is heavier than air. So you need to use more helium than argon.

Try it,you WON'T like it.

This guy full of crap I have been in welding business for 50 plus years I own over 45 bottles, I have bought bottles for years it doesn't make a difference how big they are and they belong to me. The company that I have been working with to fill my bottles went broke or sold out, now all these other so-called companies will not fill my bottles, they want to trade my bottles for their bottles they can go jump in the lake, I have too much money invested in new valve and nice paint jobs on my bottles I'm not giving up my bottles for rent. I do not lease the bottles to anyone I use them for my own use. All these welding supply companies think they own everything that way they can put the screws to you and charge you all they can. In Texas by law they cannot charge you rent on the bottles unless you sign an agreement on a pick-up day and a return date. When you buy the gas in a bottle it is yours until the bottle is empty. The only way they could charge you rent if they are a rental company.

@@sherwinstaudt1881that sucks. Can't you just replace the neck rings and show proof of ownership?

​@@jordananders8525I've been in a welding business a machine business and supply business since 1976. It is not a question of ownership of my bottles, all my bottles has customer-owned on them, 75/25 mix, pure Argan, oxygen, acetylene, CO2, nitrous oxide, the problem is the companies that I went to said it was too much trouble for them to fill my bottles and return them to me, so they wanted me to give them my bottles and then they would not charge me rent on their bottles and they would keep me supplied or what I need. Back in 76 we did that with a company gave them around 12 bottles 3 years later they start charging me rent but did not replace my bottles a bunch of Thieves. So shame on me once not twice. So now I have no alternative but to drive 300 miles one way to have my bottles filled. The reason for that is nobody around here will fill acetylene. All these be high-tech companies want to cut the little man out like me, just like Walmart has done the mama pop stores.

@@sherwinstaudt1881 huh. Here in utah we have Humphries that will do fill only and give you the bottle back. most other places will swap out for one with a blank neck ring if you own the bottle, and all slick necks are considered to be COCs unless the bottle itself has ownership markings. Lindie/praxair gives me slick necks if I ask. Every area is different but only doing business with places that give you slick necks might be your best bet. And for the bottles that might have been de facto stolen, small claims court maybe? Sounds like a fairly easy case.

You don’t need meters per minute, not being a prick but you need to pay attention to the silica that is deposited on the bead surface…… the colour ranges from very light caramel to dark brown and all the way to black….. you don’t want black, you want to be getting a caramel colour, more towards the light end of the range, that goes for both dip transfer (shirt circuit) and spray transfer… the colour gives you your temperature. As for voltage, you can’t get spray below 25 volt’s so just crank your machine to 3/4 of its maximum wire feed speed then set the bolts to around 30 volts, from there you can fine tune depending on the results…. The tip of the wire should be pointed, and the arc will be conical with an arc length, measured from the tip of the wire to the weld pool, of about 5mm….If that gap is say 10mm then you either need to increase wire speed or decrease the volts….. I jump from dip to spray depending on which weld I’m doing and I think I spray at around 13-14 meters a minute, .09 dis wire, argoshield gas and the volts are about 30-31 and that’s just a light bead….. play with the settings and have fun, try setting your machine up for dip just by listening to the sound it makes, should sound like bacon frying….. I shouldn’t have smoked that joint earlier!!!🤣🤣🤣🤣