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Low Lead Brasses

Our alloys

The constant evolution of markets in the latter years has led to a proliferation of brass alloys with low lead content.

Chemical Composition %

Alloy designation	Cu	Pb	Al	Si	Fe	Sn max	Ni max	Mn max	As	Zn
CB770S Pb 0,20 max	62 – 64,0	0,20 max	0,5 – 0,7	0,02 max	0,3 max	0,3	0,2	0,1	0,09 – 0,13	resto
CB770S Pb 0,10 max	62 – 64,0	0,10 max	0,5 – 0,7	0,02 max	0,3 max	0,3	0,2	0,1	0,09 – 0,13	resto
Biaffinato Pb 0,20 max	58,5 – 60	0,20 max	0,4 – 0,8	0,05 max	0,2 max	0,3	0,2	0,1	–	resto
Lega Verde	59 – 61	0,05 max	0,3 – 0,5	0,02 max	0,10 max	0,05	0,3	0,03	–	resto

Physical properties

Commercial designation	Density Kg/dm³	Electrical conductivity % IACS	Machinability rating % (free-machining brass = 100)	Linear shrinkage %	Optimum casting range °C	Lower melting point °C
CB770S Pb 0,20 max	8,40	22	65	1,8 – 1,9	960 – 1040	900
CB770S Pb 0,10 max	8,40	22	65	1,8 – 1,9	960 – 1040	900
Biaffinato Pb 0,20 max	8,38	22	65	1,8 – 1,9	960 – 1040	880
Lega Verde	8,36	28	60	1,8 – 2	950 – 1050	905

Mechanical properties

Commercial designation	Tensile strenght R N/mm²	Yield strenght Rr (0,2) N/mm²	Elongation A %	Hardness Brinell HB
CB770S Pb 0,20 max	380 – 420	230 – 280	30 – 37	85 – 100
CB770S Pb 0,10 max	380 – 420	230 – 280	30 – 37	85 – 100
Biaffinato Pb 0,20 max	380 – 420	230 – 280	28 – 35	85 – 100
Lega Verde	350 – 400	100 – 150	40 – 45	80 – 90

We have a large stock of alloys that allow us to respond promptly to the requests of all our customers.

Our alloys

Brasses

Low Lead
Brasses

Special high
strenght Brasses

Aluminium
Bronzes

Tin Bronzes

UBA Positive
List 4MS