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Tin - lead - zinc and nickel bronzes
Lead bronzes - lead and nickel bronzes
Tin bronzes
Tin and nickel bronzes
Manganese bronzes
Aluminium bronzes
Extremely hard aluminium bronzes
Electrolytic copper and low-alloyed copper

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Cobalt bronzes and extremely hard aluminium bronzes

Metallurgic properties
The very-thin-grain molecular structure provides a very high hardness without detriment to processability. Its inert behaviour towards other metals, together with its tendency to self-smoothing make it ideal for use it is intended for. Actually, going on using it, increasing hardening can be obtained on the surface while keeping remarkable antifriction properties. The alloy is forgeable and susceptible to thermal treatment.

Mechanical characteristics
Achieved according to the regulations of the table UNI 4855 "Casting copper alloys as ingots and castings - Generalities and tests"

VALUES REFERRED TO FORGES PIECES

Designation Composition Unitary ultimate tensile stress
R
[kgf/mm2]
Elongation
A

[%]
Brinell hardness
HB

[kgf/mm2]
Supply
DURAN 510
DURAN 512
DURAN 514
DURAN Co
Cu/Al/Fe
Cu/Al/Fe
Cu/Al/Fe
Cu/Al/Fe/Ni/Co
50÷65
50÷65
50÷70
50÷70
10÷20
1÷5
0÷0,5
0÷4
120÷150
180÷220
320÷350
320÷380
Sand cast
Forged

All these alloy are not antifriction and thus have to be used with forced lubrification or with non-continuous strength.All these alloys are forgeable

Typical application
The trademarks of bronzes "CM" "DURAN" "MAC" assure the unchangingness of mechanical and metallurgical characteristics in the castings we produce.

DURAN 510 - DURAN 512
Elicoidal ring gears, scrolls, gibs, wearing plates; matrix pushers for extrusion; molds for plastic materials; ducting rolls for stainless steel pipes.
DURAN 514
Owing the remarkable hardness and extreme brittleness it is exclusively used for the building of stainless steel molds for deep padding; lathe processing is possible, only, but with very cautiously.
DURAN Co
Very similar to DURAN 514 but with even greater hardness; lower brittleness and better processability.

   
   

Fonderia Macchi Carlo s.a.s.
Via E. Cosenz, 11 - 20157 Milano
Tel. 02 393 117 34 / 02 393 101 36 - Fax 02 393 117 34
E-mail: info@fonderiamacchi.com - Sito: www.fonderiamacchi.com
P.iva: 00544630155