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Tin Bronze Ingots, Wire and Rod
Forge

Yaremwe na

Forge

11. Ukwakira 2026NO
44
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Tin Bronze Ingots, Wire and Rod

Bronze is copper alloyed with tin. Bronze Age smiths used about 10 % tin for castings and a softer 'mild' bronze of about 6 % tin that they hammered into sheet; modern bronze is about 88 % copper and 12 % tin. It melts at about 950 °C, depending on the mix. Melt the copper, stir in the tin, pour ingots; for wire and rod, use the 6 % alloy and draw it like copper, annealing often.
Hagati
A day

Amabwiriza

1

Weigh the charge

Gupakira ikaye ya Jupyter…
2

Melt the copper

Melt the weighed copper in a crucible in the charcoal forge with the air on, under a layer of charcoal to keep the air off the metal.

Ibikoresho by'iyi ntambwe:

Ikibumbe cy'umuringaIkibumbe cy'umuringa940 g
AmakaraAmakara10 kg

Ibikoresho bikenewe:

Uruganda rw'umucuziUruganda rw'umucuzi
Ikirahure cy'Ibumba Rirwanya UmuriroIkirahure cy'Ibumba Rirwanya Umuriro
UmunzaniUmunzani
Ikanzu y'uruhuIkanzu y'uruhu
Uturindantoki two gukomeza ibyumaUturindantoki two gukomeza ibyuma
Amadarubindi y'umutekanoAmadarubindi y'umutekano
3

Add the tin

Push the weighed tin under the melt with a dry iron rod and stir it in.

Ibikoresho by'iyi ntambwe:

Igitebo cya bati (etain)Igitebo cya bati (etain)60 g

Ibikoresho bikenewe:

Amakoro y'Icyombo GishongeshaAmakoro y'Icyombo Gishongesha
4

Pour ingots

Lift the crucible with the tongs and pour into a warmed, dry ingot mould. Let it cool.

Ibikoresho bikenewe:

Amakoro y'Icyombo GishongeshaAmakoro y'Icyombo Gishongesha
Imbumbe yo gusukamo icyuma gishongeyeImbumbe yo gusukamo icyuma gishongeye
5

Hammer and draw

Anneal a 6 % ingot at a dull red and quench, hammer it round, taper the end, and draw it through the drawplate with wax, annealing every two holes. Stop at rod or go on to wire.

Ibikoresho by'iyi ntambwe:

IgishasharaIgishashara10 g
AmaziAmazi5 litiro

Ibikoresho bikenewe:

IngoyiIngoyi
Inyundo ifite umutwe wa burutaInyundo ifite umutwe wa buruta
Itara rya PropaneItara rya Propane
Itafari ryihanganira umuriroItafari ryihanganira umuriro
Amafashi y'umucuziAmafashi y'umucuzi
Indobo yo gukonjeshaIndobo yo gukonjesha
Amakariso MenshiAmakariso Menshi
Urubaho rwo gukurura insinga rw'icyumaUrubaho rwo gukurura insinga rw'icyuma
Koleyo yo gukurura insingaKoleyo yo gukurura insinga
Ifatiro ry'AmezaIfatiro ry'Ameza
6

Measure

Measure the rod or wire and label it with its tin percentage.

Ibikoresho bikenewe:

Ikigereranyo cya Digitale cy'Amasentimetero 6Ikigereranyo cya Digitale cy'Amasentimetero 6
7

Troubleshooting

Bronze troubleshooting.

Flow

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Ibikoresho

5

Ibikoresho bikenewe

19

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