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Zirconium perhaps, as it's definitely pyrophoric when finely divided. It has a density a bit less than steel (~6.5 vs around 7.8 for iron/steel) and it is a darker silver, like steel. Titanium is also pyrophoric, but noticeably lighter than a piece of steel the same size. Most of the other...

If you have been using packaging material, it should have the recycling code and polymer type on it somewhere. http://en.wikipedia.org/wiki/Resin_identification_code Clear vac formed packaging is commonly PET (polyethylene terephthalate), the stuff used for soft drink bottles. Vac forming is...

Looks like that website has closed down. The program has moved about a bit lately, but at present you can find a copy of the Windows version here. http://www.billp.org/Dockstader/ValveGear.html Regards, GB