fiver
Well-Known Member
okay now your catching on to why I also use zinc in some applications.
there is a limit to what each thing can do, and when they are subjected to stress they react quite different.
they also react differently when in the presence of other constituents in the alloy.
think about copper it's tough and strong [about 50 bhn] but you can bend and twist a wire around in all kinds of directions.
tin is airc 35 bhn but it breaks if you bend it.
add tin to the copper and you get bronze, you can sharpen it to a fine cutting edge and cut down a tree.
antimony in a lead alloy will break down and lets the lead slide over itself easier.
we use that combination in swaging, and they use it in extruded lead products.
you know those dead soft Hornady wad cutters that you can only push to 700 fps?
they have 5% antimony in them....
add 2% tin and you'll break your swaging dies.
there is hard, there is tough, and there is malleable.
you can get all three from a 3 part alloy all you gotta do is manipulate things properly.
heat treated low Sb alloys are hard until you stroke them then they become malleable.
there is a limit to what each thing can do, and when they are subjected to stress they react quite different.
they also react differently when in the presence of other constituents in the alloy.
think about copper it's tough and strong [about 50 bhn] but you can bend and twist a wire around in all kinds of directions.
tin is airc 35 bhn but it breaks if you bend it.
add tin to the copper and you get bronze, you can sharpen it to a fine cutting edge and cut down a tree.
antimony in a lead alloy will break down and lets the lead slide over itself easier.
we use that combination in swaging, and they use it in extruded lead products.
you know those dead soft Hornady wad cutters that you can only push to 700 fps?
they have 5% antimony in them....
add 2% tin and you'll break your swaging dies.
there is hard, there is tough, and there is malleable.
you can get all three from a 3 part alloy all you gotta do is manipulate things properly.
heat treated low Sb alloys are hard until you stroke them then they become malleable.