RMweb Premium newbryford Posted February 13, 2015 RMweb Premium Share Posted February 13, 2015 With a sg of about 4 they are not going to be tungsten. If they are hard they'll almost certainly be steel and if soft, probably a lead-less white metal. Liquid Gravity is described as a "lead free" and "non-toxic". Tungsten is quoted as having low toxicity, so as Bill says, unlikely to be W. Cheers, Mick Link to post Share on other sites More sharing options...
KalKat Posted February 13, 2015 Share Posted February 13, 2015 Steel has an SG of ~7.8 , Titanium 4.5 ........ perhaps allowing for the air spaces between the balls, it's steel? Info from http://www.engineeringtoolbox.com/specific-gravity-solids-metals-d_293.html Link to post Share on other sites More sharing options...
RonnieS Posted February 13, 2015 Share Posted February 13, 2015 Steel has an SG of ~7.8 , Titanium 4.5 ........ perhaps allowing for the air spaces between the balls, it's steel? Info from http://www.engineeringtoolbox.com/specific-gravity-solids-metals-d_293.html Tungsten is 1.7 times as dense as lead so I would have expected Liquid Gravity to have a higher SG than reported. What does it say it is on the container? Link to post Share on other sites More sharing options...
ozzyo Posted February 13, 2015 Share Posted February 13, 2015 The link in post two says that it's non magnetic, so it's not steel or iron based. Link to post Share on other sites More sharing options...
RMweb Premium newbryford Posted February 13, 2015 RMweb Premium Share Posted February 13, 2015 (edited) The link in post two says that it's non magnetic, so it's not steel or iron based. IIRC, there are certain grades of stainless steel that are austenitic - (non-magnetic) Who found out the hard (i.e. expensive) way when specifying materials for a (supposedly) magnetic flowswitch......... Cheers, Mick (edit - stainless) Edited February 13, 2015 by newbryford Link to post Share on other sites More sharing options...
KalKat Posted February 13, 2015 Share Posted February 13, 2015 RonnieS..... Lead is far more dense than Titanium http://www.engineeringtoolbox.com/specific-gravity-solids-metals-d_293.html http://www.simetric.co.uk/si_metals.htm Lead is getting on for 3 times as dense. Tin might be a candidate though? Link to post Share on other sites More sharing options...
ozzyo Posted February 13, 2015 Share Posted February 13, 2015 The chances are it's the same stuff that they make "lead" fishing weights out of that does not contain lead. I don't think that it will be tin due to the cost of tin. Link to post Share on other sites More sharing options...
RonnieS Posted February 14, 2015 Share Posted February 14, 2015 RonnieS..... Lead is far more dense than Titanium I think we have a crossed line? Tungsten is the densest, affordable material. Used in Engineering for cutting tools. Titanium is a light aluminium type alloy. Used in Engineering for aircraft components due to its light weight. Link to post Share on other sites More sharing options...
RMweb Premium PhilJ W Posted February 14, 2015 RMweb Premium Share Posted February 14, 2015 Many modern fishing weights are ceramic which should not cause any problems. Link to post Share on other sites More sharing options...
KalKat Posted February 14, 2015 Share Posted February 14, 2015 Ronnie....oops!.... I can only blame brain fade. Too much to do and no time to do it in, and titanium got stuck in my head :-S Link to post Share on other sites More sharing options...
RonnieS Posted February 14, 2015 Share Posted February 14, 2015 Many modern fishing weights are ceramic which should not cause any problems. The tungsten cutting tips are also known as "Ceramic" so maybe? Link to post Share on other sites More sharing options...
34theletterbetweenB&D Posted February 16, 2015 Share Posted February 16, 2015 Tungsten is 1.7 times as dense as lead so I would have expected Liquid Gravity to have a higher SG than reported. What does it say it is on the container? Tungsten beads would pack to much the same density as solid lead. A real advantage in ease of use with much lower toxicity, would be the potential from tungsten beads; but is such a product readily available and at what price? Anyone know? Lead has the benefit of being highly malleable, easily cut and readily available at a low price - it is the most density per £1 (or even free if you know a friendly lead roofing specialist). The wealthy modeller can use Gold. Dense, safe, exceedingly malleable, readily recyclable into cash at need... Link to post Share on other sites More sharing options...
RBAGE Posted March 21, 2015 Share Posted March 21, 2015 I think we have a crossed line? Tungsten is the densest, affordable material. Used in Engineering for cutting tools. Titanium is a light aluminium type alloy. Used in Engineering for aircraft components due to its light weight. Titanium and aluminium may be light but they certainly aren't alloys. They are metal elements. An alloy is a material composed of at least 2 other elements, at least one of which is metal. Link to post Share on other sites More sharing options...
RBAGE Posted March 21, 2015 Share Posted March 21, 2015 Deluxe materials suggest the use of a penetrating superglue to hold liquid lead in place. Be careful if you use this method. Make sure that whatever nook or cranny you fill has all it's joins fully sealed. If not, as I found to my cost, the penetrating superglue will, err, penetrate. The superglue might run through the joint, cover your hand which is holding the model, sticking your fingers together (superglue was developed to stick skin together after all). It might start to dissolve the foam cradle that the whole thing is resting on. It might also cover the outside of your lovely model with superglue which might take you days to get back to the original pre-paint condition you'd just lost. Imagine how you might feel if that happened when the model was already painted. But I suppose if it had been painted, the paint might have sealed the joints and I wouldn't be passing on the possibility of a bad experience. Bob 1 Link to post Share on other sites More sharing options...
RMweb Premium JZ Posted March 21, 2015 RMweb Premium Share Posted March 21, 2015 I use tyre balancing weights, 100x60g self adhesive strips(3x10g+3x5g per strip) for around £18 on ebay. Enough there to last a lifetime of vans and coaches. For opens and flats, I am nearing the end of a 2Kg bottle of liquid lead bough a few years back. I have also used tungsten drill shanks from broken drill at my last employer, until we realised the scrap value, then we saved them up and took them to a scrap dealer and split the money between us three operators. In the past and not on railways, I have used, whisper it, mercury. I did a lot of US military aircraft at this time, 1970s, and had a ready supply from broken mercury switches at my then employer. It would be poured into a nose cone and a shaped piece made to put over it and sealed with epoxy. At that time the dangers of mercury were only becoming apparent. Eventually all models had it removed and the mercury returned to work for recycling. It is a shame that it is poisonous and expensive. Link to post Share on other sites More sharing options...
edcayton Posted March 21, 2015 Share Posted March 21, 2015 Tungsten relative density 19.3 according to wiki. The cutting tools are Tungsten Carbide which comes under the heading of ceramic. Ed Link to post Share on other sites More sharing options...
RonnieS Posted March 23, 2015 Share Posted March 23, 2015 Titanium and aluminium may be light but they certainly aren't alloys. They are metal elements. An alloy is a material composed of at least 2 other elements, at least one of which is metal. Titanium Ti 6AL 4V - AMS 4911 Link to post Share on other sites More sharing options...
Passed Driver Posted February 1, 2018 Share Posted February 1, 2018 Hi All. I purchased a substitute for Liquid Gravity at Warley in 2017 from a famous emporium, and I tried to fix it in position with Superglue. I left it overnight toset, but the next day I picked up the wagon and some of “ fluid Lead “ fell out. Would someone please advise me “ What went Wrong”??? Best wishes. Kevin Link to post Share on other sites More sharing options...
RMweb Premium PhilJ W Posted February 1, 2018 RMweb Premium Share Posted February 1, 2018 Hi All. I purchased a substitute for Liquid Gravity at Warley in 2017 from a famous emporium, and I tried to fix it in position with Superglue. I left it overnight toset, but the next day I picked up the wagon and some of “ fluid Lead “ fell out. Would someone please advise me “ What went Wrong”??? Best wishes. Kevin Superglue, epoxy glues are best. Link to post Share on other sites More sharing options...
RMweb Gold Tim Hall Posted February 1, 2018 RMweb Gold Share Posted February 1, 2018 Some of my wife's cake baking attempts would suffice...... Link to post Share on other sites More sharing options...
orford Posted February 1, 2018 Share Posted February 1, 2018 (edited) As per 'JZ' above, for weighting wagons, etc., I tend to use self-adhesive 5 and 10gm lead-free weights made for balancing car wheels. Have done for years, although I am in O Gauge. May be trickier to fit them to the likes of open wagons in OO because of the smaller size of the models. Can usefully be used to add weight to locos too. These are the ones. https://www.ebay.co.uk/itm/10-STRIP-LEAD-FREE-STICK-ON-WHEEL-BALANCE-WEIGHTS-MOTORBIKE-CAR-MOTORCYCLE-VAN-/221116096305 Edited February 1, 2018 by orford Link to post Share on other sites More sharing options...
37Oban Posted February 2, 2018 Share Posted February 2, 2018 Hi, for my n gauge open wagons I use pieces of lead strip that is supplied for sinking plants in aquariums. It's available in various lengths, is easy to cut to size and to fix with superglue or a dab of epoxy. Roja Link to post Share on other sites More sharing options...
Graham456 Posted February 2, 2018 Share Posted February 2, 2018 Hi All. I purchased a substitute for Liquid Gravity at Warley in 2017 from a famous emporium, and I tried to fix it in position with Superglue. I left it overnight toset, but the next day I picked up the wagon and some of “ fluid Lead “ fell out. Would someone please advise me “ What went Wrong”??? Best wishes. Kevin Well I have successfully used the same stuff from the same place, But you do have to flood the superglue in as the gaps between the balls are quite large in volume so I built the glue up over several application/days allowing it to go off until the next dose Because of these gaps I use lead sheet as much as possible only useing the shot balls where the gaps are small. Link to post Share on other sites More sharing options...
RMweb Gold TheSignalEngineer Posted February 2, 2018 RMweb Gold Share Posted February 2, 2018 From doing some kitchen alterations I have a nice piece of thin sheet steel off a cooker hood chimney. I used that on the floor of mineral wagon kits. Painted and weathered it adds about 30 grams to a 16T wagon. Any other weight weight on open wagons which can run empty is added to the underside with Liquid Gravity. I always apply this in layers, weighing out what I want to add into a plastic tray, coat the area to be covered with glue and scatter on the balls. When set I shake around to make sure the loose stuff is evenly distributed then add more glue. 1 Link to post Share on other sites More sharing options...
Passed Driver Posted February 2, 2018 Share Posted February 2, 2018 Well I have successfully used the same stuff from the same place, But you do have to flood the superglue in as the gaps between the balls are quite large in volume so I built the glue up over several application/days allowing it to go off until the next dose Because of these gaps I use lead sheet as much as possible only useing the shot balls where the gaps are small. Hi Graham. Thank you. In the meantime? I realised that the “High Viscosity “ super glue was the problem so down to the shop ( Toolstation) I goes and purchased a thin Superglue , fingers crossed it seems to work? Best wishes. Kevin 1 Link to post Share on other sites More sharing options...
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