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> German police were investigating an incident at a Hamburg shipyard where several dozen kilograms of metal shavings were dumped into a corvette-class vessel's
by jcgrillo 2y ago
> German police were investigating an incident at a Hamburg shipyard where several dozen kilograms of metal shavings were dumped into a corvette-class vessel's engine system.
Italics mine, and holy crap that's a lot of metal shavings.. like multiple 55gal trash cans' worth.
- lostlogin 2y agoThat sounds really unlikely. Is there some that is more dense?
- jcgrillo 2y agoIME they're really not all that dense. When chips come off a lathe or mill cutter they are curled and have small serrations in them where the sharp edge cracked as it was curling. So they don't pack well. Each chip takes up a large amount of 3D space and they interlock really easily--they don't slide past each other.
- froh 2y agoah that's where you're coming from (see my other comment) https://www.mollet.de/info/schuettdichte-und-schuettgewicht.html https://www.mollet.de/info/schuettdichte-und-schuettgewicht.... iron and steel chips still are about 2 kg/l aluminum is 200g / l so one 55gal trash bin is still about 40 something kg, four dozen. so for aluminum and aluminum only it may be multiple trash bins
- lostlogin 2y agoThis still sounds hard to sneak into a warship’s oil system though.
- D13Fd 2y ago> holy crap that’s a lot of metal shavings.. like multiple 55gal trash cans’ worth I don’t think so. A 55gal Tran can full of metal shavings is probably several hundred lbs. 2 dozen kilograms is only about 53lbs.
- hx8 2y agoIt really depends on how corse the shavings are, if you do any work to compress the metal shavings, and the density of the alloy. However I think you're right, because 53lb of steel is only about 0.1ft^3.
- jcgrillo 2y agoI assure you it isn't. I've lifted them many times. I'd say 75-100lbs is normal, depending on the distribution of metals (obviously steel is heavier than aluminum for example).
- froh 2y agothat's not correct several dozen is not several hundred 1 dozen = 12 55 us liquid gallons = 208,198 litres the densities of metals are higher than that of water ca 1 kg/l aluminum ca 2.7 kg/l steels and iron 7.5-8.5 kg/l brass 8.5-9 kg/l gold almost 20kg/l several dozen kg is half a 55gal worth, maybe one... EDIT for shavings: https://www.mollet.de/info/schuettdichte-und-schuettgewicht https://www.mollet.de/info/schuettdichte-und-schuettgewicht.... iron and steel chips / shavings still are about 2 kg/l aluminum is 200g / l so one 55gal trash bin of aluminum shards is still about 40 something kg, four dozen. thus for aluminum and aluminum only I stand corrected, it may be multiple trash bins.
- cenamus 2y agoShavings are way less dense than solid blocks of metal.
- jcgrillo 2y agoA trash can of metal shavings is mostly filled with air.
- Towaway69 2y ago> 55 us liquid gallons = 208,198 litres I was also confused but could be German usage where comma and dots are swapped. The German 208,198 is the same as the English 208.198 Conversely the English 1,000,000 is 1.000.000 in German! Very confusing. Remember Germany is still the place where you say four-and-twenty for twenty-four …