Treće komponente u mesingu

Aluminij- Al znatno povečava čvrstoču, a jače ne mijenja istezanje i
plastičnost. Dodaci aluminija na površini formiraju tanke oksidne filmove,
sto na temperaturi žarenja znatno štiti od oksidacije. Dodatkom 2% Al
potpuno prestaje oksidacija mesinga na višim temperaturama.
Željezo- Fe u mesingu usitnjuje njegovo kristalno zrno. Dodaci iznad
0.2%Fe povečavaju čvrstoču i temperaturu rekristalizacije mesinga.
Nikal- Dodaci Ni u mesingu povečavaju njegovu otpornost prema koroziji i
usitnjavaju zrno kod žarenja. Legurama iz α + β područja znatno povečavaju
čvrstoču, dok se taj utjecaj u legurama iz α- područja ne primječuje.
Mangan- Mn povečava antikoroznost mesinga u morskoj vodi. Do 4% Mn
povečava čvrstoču, bez smanjenja žilavosti i plastičnosti. Veći dodaci Mn
smanjuju znatno duktilnost. Mn daje mesingu lijepu smeđu boju.
Fosfor - P u mesingu usitnjava zrno i smanjuje unutarnja naprezanja.
Silicij- Si utiče uglavnom na ljevkost mesinga.


Olovo- Pb se dodaje mesingu radi povećanja njegove rezljivosti. Mesingu se
Pb dodaje ako je namjenjen obradi na automatima.

A modovi se u velikim serijama sigurno rade na nekoj vrsti automata

ok i da ima olova u tragovima ono je legirano sa svim ostalim materijalima koji se nalaze u leguri pa nekuzim kaj svi dizu frku oko mesinga i olova...... i ostalih pizdarija...... pa ljudi olovni amalgam se koristi kolko dugo u zubarskoj industriji ?? uostalom koji je problem sa 2promila olova u leguri? na koji nacin šteti? a nitko se ne pita kaj se nalazi u aromama koje unosiš u puno vecim kolicinama u organizam ali to je FDA approved pa je onda OK ?!
Stvarno se nekad pretjeruje........ ma...
pozdrav sa paga :-)

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Ako te uhvati napadaj radinosti, mirno sjedni u ćošak i čekaj da te napadaji prođu!

Top III :Habana, Grandmaster, Grenada
I² Element18350/18650+kick, Ant-i-Mod +5V, Ergo69-Yenki69,UD Agi,IgoW

CuZn39Pb3
(MS58) CW614N 8,5 Cu 57,0-59,0 Pb2,5-3,5 Zn ostatak

To enhance the machinability of brass, lead is often added in concentrations of around 2%. Since lead has a lower melting point than the other constituents of the brass, it tends to migrate towards the grain boundaries in the form of globules as it cools from casting. The pattern the globules form on the surface of the brass increases the available lead surface area which in turn affects the degree of leaching. In addition, cutting operations can smear the lead globules over the surface. These effects can lead to significant lead leaching from brasses of comparatively low lead content.
Silicon is an alternative to lead; however, when silicon is used in a brass alloy, the scrap must never be mixed with leaded brass scrap because of contamination and safety problems.
In October 1999 the California State Attorney General sued 13 key manufacturers and distributors over lead content. In laboratory tests, state researchers found the average brass key, new or old, exceeded the California Proposition 65 limits by an average factor of 19, assuming handling twice a day.[10] In April 2001 manufacturers agreed to reduce lead content to 1.5%, or face a requirement to warn consumers about lead content. Keys plated with other metals are not affected by the settlement, and may continue to use brass alloys with higher percentage of lead content.
Also in California, lead-free materials must be used for "each component that comes into contact with the wetted surface of pipes and pipe fittings, plumbing fittings and fixtures." On January 1, 2010, the maximum amount of lead in "lead-free brass" in California was reduced from 4% to 0.25% lead. The common practice of using pipes for electrical grounding is discouraged, as it accelerates lead corrosion.



The copper in brass makes brass germicidal. Depending upon the type and concentration of pathogens and the medium they are in, brass kills these microorganisms within a few minutes to eight hours of contact.

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Kao i ljubav na kojoj mogu jedino biti zahvalan.