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Its a very basic guide, and really only applies to metals in its pure form. Most scrapyard and commercial sources have an alloyed form of each material, meaning its mixed with other metals and some of its properties will change. Often times it may be washed with another, electroplated, chemical plated, hardened, etc. Not unusual for something that appears to be one metal is actually another- for example, gold and silver plated objects. Another example, pure tin may snap when bent, but the common 'tin sheet' is a steel sheet with a thin layer on tin on the surface, and it does not make noises when bent (with a brake). A few of my own methods- aluminum is diamagnetic (sp?). this means a non moving magnet will not stick, but a moving magnet the aluminum will gain some magnetic properties. Chrome is usually plated on to another metal, there is decorative that can tarnish, peel and flake off, if in good condition has a mirror finish, and is pretty soft. Then there is hard chrome often used on load bearing parts (axles, shafts, bearings, etc) that is matte silver in color, can be very glossy in texture, will not be scratched even with a hardened steel sample, generally does not tarnish or corrode. Its not just silver that turns black over time. the presence of ammonia in the vicinity of a metal can make it turn black. (learned this the hard way when i accidentally left steel tools in a bucket of water with some house paint in it) long term exposure to ammonia can cause pitting. Best way to identify if something is solid magnesium is its price tag. Its expensive. really expensive. alternatively, small metal filings (shave off with a steel knife) will readily ignite by match or lighter flame and burn bright white. primary consumer uses would be performance engine blocks and performance car wheels (rims). Titanium is a tough one to identify, but again easy if you just look at the price tag, the stuff is more than $1200 an ounce. Ti is rarely used in every day objects, exotic purposes only- medical, aeronautics, and high end camping gear. I have a Snow Peak camping set made of Ti, only way you'd know its Ti and not something else is that it will scratch ordinary steel utensils (plus its like 50 bucks a pot!)
back in the old days (pre-1933) when gold coins were in circulation (and money was worth so much more) people would bite the coin and see if there is a small dent from the bite to determine if the gold coin is legit. Gold is very soft and can even rub off on your fingers. pure solid gold is rarely used for any practical purpose, it is mostly used for jewelry. general purpose gold is either white gold (alloyed) or gold plated electrical components. if you're trying to salvage gold from electrical components or connectors you'd need a few hundred pieces to get a few grams of gold- there really isn't that much gold when its plated on another material.
it is likely tinned copper wire. this is copper wire coated with tin so it is easily soldered with other wires or electrical components. the tin is only a few ten thousandths (0.0001") of an inch thick. i know back in the 60s and 70s for house wiring (in walls or appliances) they'd use aluminum for conductors. it was cheaper at the time to use alumnium than copper, but when overloaded the wires are known to start fires and is banned in construction and general use today. it is unlikely alumnium would be used for cell chargers.
One thing to mention about magnesium is that is reacts with vinegar ( starts bubbling) while aluminium doesn't so it makes it easier to distinguish between the two.
I was cutting open wires of several different phone chargers to scavenge some copper but one particular charger for Sony Xperia J didn't have copper wiring inside, instead there was a shiny, grey, relatively light ( or so it seemed to my hand) metal wiring. What could that metal be? I thought maybe silver since it is used in electronics but it seems too light especially compared with the copper. What else could it be? Steel, zinc, aluminium, maybe silver after all? Please inform me.
will running a piece through a dryer w/ no heat in a bag of sand clean it off?
Trying to artificially rust pipe for a project. Soaked it with vinegar inside a heavy-duty garbage bag for 2 hours. Wire brushed clean! Funneled vinegar back into the empty gallon, labeled for shop, (not that the rusty brown color doesnt give it away). Soaked the pipe in bleach water new bag. Viola, rusty pipe!
your email address sooooo needs a hyphen lol. stevens weeney hah lol. not to be taken offensively by the way.
in costume vintage jewellery with no stamp how can I tell. Which one goes green or black over time?
any easy gold testing without acid or gun?
Easy Calculator Hack
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