What type of stainless steel alloy should be used  to convey powdered metal thru a stainless Hopper?
447262
What type of metal is powdered? The reason I ask is because I need to know If it is magnetic and if their are contaminant issues/
231388
Get a GOOD mortar and pestle.  They are online, but you can find them at WM and any good kitchen store. If you are only grinding small amounts, get a smaller one.  I have a huge lava rock one and it's too heavy to lift easily for dumping out what's ground, and it's scary moving it over my counter!
592801
Steel is an alloy of carbon and iron.  If you want stainless steel, throw in some Chromium, too.
808448
Bunsen burner- to heat\nmortor and pestel- to grind solids into powder
363070
Copper, Iron, Chromium, Aluminium
1133512
ESD (Electric-Static Discharge) Workboots, explosion proof switch and power boxes with a positive pressure airflow to keep dust from entering. Absolutly no open contacts where a spark may occur should be out in the open.  make sure all pipes carring the powder are grounded so they will not build up a charge; better yet, ground anything metal to keep from building a charge.
525823
Volquartsen makes a good receiver, regardless of what metal it's made of. If you're shooting off a bench, then it matters very little how heavy the receiver is. Get the stainless in that case; it's less expensive and will last longer. Of course, "longer" is measured in tens of thousands of rounds.\n\nBy the way, make sure you get the threaded receiver and marry it to a threaded barrel if you're talking about a 10/22 receiver. The original 10/22 is held together with this wedge that pulls the barrel into the receiver, but it's not a great fit. Threaded barrels take care of any slop and really improve your accuracy.
912636
Stainless steel contains chromium that was put there by diffusing it in there with high heat and a concentration difference.  Metals corrode because they get converted from neutral, solid form to ions (they are oxidized, that's why oxidation is a synonym for corrosion) that combine with negatively charged ions (usually oxides or chlorides) and are no longer metal, and many times soluble, hence taking a chunk out of your original metal.  Chromium is a more active metal than the iron that makes up most of the steel.  This means when both are present on the same surface, the chromium is more likely to dissolve into ions and electrons than the iron.\n\nWhen stainless is exposed to dissolved oxygen in water (for example) the chromium atoms will dissolve their way towards the surface of the steel. Then, they will be oxidized:\n\nCr(s)-->Cr3+ + 3e-\n\nWhat little iron that may have been oxidized before the chromium reached the surface can gain these 3 electrons and join the surface as solid iron again.  Otherwise, once the Cr reaches the surface, it'll corrode to form chromium oxide, a greenish black powdery ceramic that doesn't stick well to the surface, and can be easily rinsed away or knocked off.  And while the Cr will be oxidized, the iron will not because the Cr is more active. The steel itself remains shiny and well, stainless (without rust).  However, when the steel runs out of Cr atoms to sacrifice to protect the iron (once they become chromium oxide, they won't go back to being regular Cr metal, and the oxide does NOT stick to the surface to protect it), the iron will rust.
378996
go to london metals exchange\nhttp://www.lme.co.uk/
408961
It depends on the impurities in the gas and the temperature of the gas.  If you have high chlorides and thermal cycling, you may need alloy steel.\n\nFor a pure hydrocarbon stream at less than 60°C, carbon steel would be fine.
843269
Use the Nickel Metal..Put your steel into a electrolysis solution of Nickle  electrolytes and charge it with electric anode and cathodes.
248692
Need to know the type of metal and thickness to answer this question.
834008
It all depends on how you make it.  Usually you don't want it to be porous, and try to make  it in a manner that prevents voids (holes, pores) from forming.  On the other hand, you sometimes may want porous stainless steel (for a membrane support, a filter, a bubbler, or a muffler), and make it accordingly.  \n\nThe stainless steel most people encounter day-to-day, such as you would find in a fork or in a sheet, is effectively nonporous.
842900
Anything containing Iron or Steel.  Any Ferris material.  Steel is made from iron, however, stainless steel is not magnetic.  Aluminum, copper, brass, gold, and silver are not magnetic.
133760
The Iron content in Stainless steel is less than other steel alloy\nThe Cromium Content is more\nCr is not a ferromagnetic matter So Stainless steel is not ferromagnetic
487899
Cast iron as relates to piping products conforms to ANSI/ASME class 125 and class 250. Maximum operating pressure at ambient temperature for class 250 is 400psig per ANSI B16.4
523609
Let me start by warning you not to attempt to make gun powder.  It is extremely hazardous and you can be killed or seriously burned while trying to make it.  The grinding process can very easily set it off.  If you want black powder, you can buy it at many sporting goods stores that sell muzzle loading rifles.  DO NOT ATTEMPT TO MAKE IT YOURSELF.\n\nBlack powder can be made by grinding together 2 parts charcoal, 3 parts sulfur and 15 parts potassium nitrate.  Once ground together (if you survive) the powder tends to separate with agitation and must be remixed each time before loading into a gun.  You can avoid this problem to some extent by mixing the ingredients with a little water to form a paste.  Allow the paste to dry and then grind into a coarse powder with the consistency about like grits or Cream of Wheat.  This grinding process is also extremely hazardous and can kill you.\n\nRemember, many people have tried making gun powder and have ended up loosing eyes, fingers, hands, arms and even then lives.  It ain't a project for a curious armature.  DON'T MAKE IT....JUST BUY IT IF YOU MUST HAVE IT.  Even then, it is a hazardous substance to handle.  Get proper instruction before handling it.  The best advice is don't make it, buy it or handle it.  Just read about it and leave it alone unless you own a muzzle loader which is made to use it.  Then get proper instructions for handling both the powder and the gun.