how can stainless be etched or engraved?
154339
I am guessing you mean stainless steel. Stainless means that it resits staining  normal oils, soaps, the mild acids found in open air and persipation (human sweat),  that rust or stain normal metals such as iron, copper, sterling silver. Etching or engraving usually very strong acids such as hydrochloric (HCl).
978775
Either injected moulded or turned
54817
Are you referring to radioactive decay rates of isotopes of the three elements (copper, aluminum and iron) that you listed? If so, the first answer gave you some info, but you should check it (e.g., because copper has more than one isotope and they all have different half-lives). One can't specify a half-life for stainless steel because it's a mixture of metal elements whose ratio isn't specified by the generic name.\nIf instead you're referring to some measure of chemical activity, such as corrosion life, you haven't given enough details. (Well actually you haven't given enough details either way.) You could google corrosion rate, reaction rate and similar terms if you want to go further with that.
645368
They are cast onto flat aluminum, then molded. Not so difficult.
224544
Engravers shops are probably the best place. Try your local phone book. Failing that try a key cutting place. Might sound bizzare but they have alsorts of memorials etc in the ones i have seen. Good luck and i hope you find what you are after.
465145
There are several ways:\n\nCheck for the thread that runs through real bills by holding it up to the light.\n\nLook for the ghost images that some denominations have.\n\nLook for the miniature writing along the portraits.\n\nUse a pen designed for checking for counterfeit bills.  The ink turns gold on real money, stays black when on fake.\n\nThere are more ways depending on the denomination and year or printing.  Newer higher denomination bills have varying colors that are difficult (if not impossible) to duplicate on a printer.
467507
Steel, copper, and brass (for casings)
465256
Yes, tongue piercings can be done with steel, but only 316LVM or higher grade surgical stainless steel. Any lower grade steel should not be used under any circumstances.
456949
sand and use a ferrous primer and then aluminum paint or  just wirebrush and clean and wash with vinegar then use a spray epoxy  talk to a metal finish expert at  ici dulux paints [ glidden]
980986
to figure it out look for a "pt" or "plat" stamp.\nMost new platinum jewelry has a cobalt alloy blend and will have a "pt 950" or "plat 950" stamp inside the ring band. A good test you can do to check if it's got cobalt is to put it to a strong magnet. Cobalt is highly magnetic.
176919
There are fonts you can get--that's probably the easiest way.\nThe glpyhs weren't as standardized as our writing is now and we still can't read them all.
853495
Are you talking about sealing surfaces or welded connections?\n\nFor sealing surfaces you have raised face flanges that can use a flat gasket or a spiral wound gasket. There are  flanges with grooved faces that use a soft oval shaped iron ring. These are usually just called ring joint flanges. Tongue and groove flanges are also available.You can also get flat faced flanges (typically for water and other low pressure services) that can use a rubber or asbestos like gasket.\n\nThe connection of the flange to the pipe can be butt weld, socket weld, slipon, or threaded.
360652
Hematite is cut and polished just like any other rock/ore. I'm unsure how to go about removing marks from it though.
963845
I had a section of this taught to me in 10th grade and it still confuses me sometimes.  Anyway, the correct answer is Jacobses, even though it looks lengthly.  A lot of times people get engraved things written down wrong.
474791
if you go to the online store its free engraving. if you buy it at an apple store you can ask them to order it in from apple once again free engrave if you buy it from something like bestbuy your out luck unless you wanna void warenty
642448
If the brass is 'half-hard', you would need to make a cold-reduction by running the parts through a set of rollers.  You can feed the part (with a set of tweezers) through the rollers.\n\nUnfortunately, the rollers will squeeze the part vertically (thickness), but also horizontally.  This will distort the part.  \n\nA better solution is to purchase "spring temper" brass and do the chemical etching on the spring temper material; that way, no cold reduction is needed.\n\nA 60.5% reduction from the annealed state will get you a spring temper on 70%Cu30%Zn alloy; this means you'll need approximately another 40% reduction to get to spring temper.
1031190
&+hearts+;\n\nPut them together without the plus signs  ♥ Or just copy and paste them.