Wrought Copper-zinc-lead Alloys (Leaded Brasses)—Compositions, Properties, Standards and Uses

These tables provide information on wrought copper-zinc-lead (leaded brasses). Compositions, typical mechanical properties, relevant standards, and characteristics and uses are shown.

Information is split into two tables, both ordered by EN number.

The first table shows compositions—either a range or maximum—and typical uses. Note that not all elements listed as impurities are shown here. For the full chemical composition you should refer to the standard or the Copper and copper alloys. Compendium of compositions and products PD CEN/TS 13388.

The second table indicates typical mechanical properties, machinability and relevant BS EN standards. The material conditions defined by the standards are given and—where mandatory—this is indicated.

Machinability is shown as a percentage, where free-cutting brass is designated as 100%.

For more detail, the appropriate standard(s) should be consulted. Visit our page with details of standards and links to the BSI shop.

How to use these tables

  • Notes: please read these, at the foot of the table.
  • Column visibility button: click for drop down of column headings, and click on the column/s that you wish to hide.
  • Search: search just within the table.
  • Show entries: use this to change number of rows visible.
  • Print: this will print a portrait version of the table (use ‘Column Visibility’ to hide columns, as required). The notes at the foot of the table will not be printed.
  • Green + button: click to view more columns.

Wrought Copper-zinc-lead Alloys (Leaded Brasses)—Compositions and Uses

EN
Number
EN
Symbol
Nearest
Old BS
Equiv.
Cu
%
Al
%
As
%
Pb
%
Sn
%
Zn
%
Others
%
Characteristics and Uses
CW600NCuZn35Pb1CZ11862.5-64.00.05-0.8-1.60.1Rem.0.3 NiMachinable with good to very good cold workability.
CW601NCuZn35Pb2CZ119, CZ13162.0-63.50.05-1.6-2.50.1Rem.0.3 NiMachinable with good to very good cold workability. Standard alloy for extreme riveting.
CW602NCuZn36Pb2AsCZ13261.0-63.00.050.02-0.151.7-2.80.1Rem.0.3 NiDezincification resistant brass with good machinability and moderate hot and cold workability.
CW603NCuZn36Pb3CZ12460.0-62.00.05-2.5-3.50.2Rem.0.3 NiExcellent machinability but very limited cold workability.
CW604NCuZn37Pb0.5-62.0-64.00.05-0.1-0.80.2Rem.0.3 NiFor manufacture of plate and tube.
CW605NCuZn37Pb1-61.0-62.00.05-0.8-1.60.2Rem.0.3 NiFor manufacture of tube and hollow rod.
CW606NCuZn37Pb2CZ119, CZ13161.0-62.00.05-1.6-2.50.2Rem.0.3 NiGood machinability and some cold workability for limited bending and riveting.
CW607NCuZn38Pb160.0-61.00.05-0.8-1.60.2Rem.0.3 NiMachinable with good to very good cold workability.
CW608NCuZn38Pb2CZ120, CZ12860.0-61.00.05-1.6-2.50.2Rem.0.3 NiGood machinability and some cold workability for limited bending and riveting.
CW610NCuZn39Pb0.5CZ123, CZ13759.0-60.50.05-0.2-0.80.2Rem.0.3 NiMachinable with good to very good cold workability. Standard alloy for bending.
CW611NCuZn39Pb1CZ12959.0-60.00.05-0.8-1.60.2Rem.0.3 NiMachinable with good to very good cold workability.
CW612NCuZn39Pb2CZ120, CZ12859.0-60.00.05-1.6-2.50.3Rem.0.3 NiGood machinability and some cold workability for limited bending and riveting.
CW613NCuZn39Pb2Sn-59.0-60.00.1-1.6-2.50.2-0.5Rem.0.3 NiGood machinability and limited cold workability.
CW614NCuZn39Pb3CZ121Pb357.0-59.00.05-2.5-3.50.3Rem.0.3 NiExcellent machinability but very limited cold workability. Alloy CW614N is rated as a standard against which other materials are compared.
CW615NCuZn39Pb3Sn-57.0-59.00.1-2.5-3.50.2-0.5Rem.0.3 NiHot forging.
CW616NCuZn40Pb1Al-57.0-59.00.05-0.30-1.0-2.00.2Rem.0.2 NiHot forging.
CW617NCuZn40Pb2CZ12257.0-59.00.05-1.6-2.50.3Rem.0.3 NiExcellent machinability but very limited cold workability. Alloy CW617N is the standard hot forging brass.
CW618NCuZn40Pb2Al-57.0-59.00.05-0.5-1.6-3.00.3Rem.0.3 NiProfiles by hot extrusion. Aluminium imparts a golden lustre, avoiding need for further polishing. The alloys with more than 1.6% Pb have very good machinability.
CW619NCuZn40Pb2Sn-57.0-59.00.1-1.6-2.50.2-0.5Rem.0.3 NiGood machinability and limited cold workability.
CW620NCuZn41Pb1Al-57.0-59.00.05-0.5-0.8-1.60.3Rem.0.3 NiProfiles by hot extrusion. Aluminium imparts a golden lustre, avoiding need for further polishing. The alloys with more than 1.6% Pb have very good machinability.
CW621NCuZn42PbAl-57.0-59.00.05-0.5-0.2-0.80.3Rem.0.3 NiProfiles by hot extrusion. Aluminium imparts a golden lustre, avoiding need for further polishing.
CW622NCuZn43Pb1Al-55.0-57.00.05-0.5-0.8-1.60.3Rem.0.3 NiProfiles by hot extrusion. Aluminium imparts a golden lustre, avoiding need for further polishing. The alloys with more than 1.6% Pb have very good machinability.
CW623NCuZn43Pb2CZ13055.0-57.00.05-1.6-3.00.3Rem.0.3 NiProfiles by hot extrusion. Aluminium imparts a golden lustre, avoiding need for further polishing. The alloys with more than 1.6% Pb have very good machinability.
CW624NCuZn43Pb2AlCZ13055.0-57.00.05-0.5-1.6-3.00.3Rem.0.3 NiProfiles by hot extrusion. Aluminium imparts a golden lustre, avoiding need for further polishing. The alloys with more than 1.6% Pb have very good machinability.
CW625NCuZn35Pb1.5AlAs-62.0-64.00.5-0.70.02-0.151.2-1.60.3Rem.0.2 NiDZR with good machinability. Approved for drinking water contact under 4MS.
CW626NCuZn33Pb1.5AlAs-64.0-66.00.8-1.00.02-0.151.2-1.70.3Rem.0.2 NiDZR with good machinability. Approved for drinking water contact under 4MS.
Wrought Copper-zinc-lead Alloys (Leaded Brasses)—Compositions and Usescopperalliance.org.uk

Table Notes:
Compositions are given as either a range or a maximum.

Wrought Copper-zinc-lead Alloys (Leaded Brasses)—Properties and Standards

EN
Number
EN
Symbol
Nearest
Old BS
Equiv.
0.2%
Proof
Strength
(N/mm2)
Tensile
Strength
(N/mm2)
Elong-
ation
(%)
Hardness
(HV)
Machin-
ability
Index (%)
1652
Plate, Strip, Sheet, Circles
For general purposes
12164
Free
Mach- ining
Rod
12165
Forging
Stock
12166
Wire
12167
Profiles, Rectang-
ular Bar
For general purposes
12168
Free Mach-
ining
Hollow
Rod
12420
Forgings
12449
Tubes
For general purposes
Characteristics and Uses
CW600NCuZn35Pb1CZ118150-450300-580 45-1090-15050HRHMRHMRHMRHMRMachinable with good to very good cold workability.
CW601NCuZn35Pb2CZ119,
CZ131
150-350330-470 30-1090-13065HMRHMRHMRHMRHMRMachinable with good to very good cold workability. Standard alloy for extreme riveting.
CW602NCuZn36Pb2AsCZ132120-200280-450 40-2080-14070HMRHMHMRHMRHMHMRDezincification resistant brass with good machinability and moderate hot and cold workability.
CW603NCuZn36Pb3CZ124160-450340-580 35-590-15095HMRHMRHMRHMRHMRExcellent machinability but very limited cold workability.
CW604NCuZn37Pb0.5160-450300-580 45-1080-15045HRHMRFor manufacture of plate and tube.
CW605NCuZn37Pb1160-340340-440 35-1080-13050HMRHMRFor manufacture of tube and hollow rod.
CW606NCuZn37Pb2CZ119,
CZ131
160-450300-580 45-590-15070HRHMRHMRHMRHMRGood machinability and some cold workability for limited bending and riveting.
CW607NCuZn38Pb1150-420360-580 30-590-15055HMRHMHMRHMRHMHMRMachinable with good to very good cold workability.
CW608NCuZn38Pb2CZ120,
CZ128
150-450360-580 40-590-15075HRHMRHMHMRHMRHMRHMRGood machinability and some cold workability for limited bending and riveting.
CW610NCuZn39Pb0.5CZ123,
CZ137
150-450360-580 40-590-15050HRHMRHMHMRHMRMachinable with good to very good cold workability. Standard alloy for bending.
CW611NCuZn39Pb1CZ129150-420360-580 30-590-15060HMRHMHMRHMRHMMachinable and have good to very good cold workability.
CW612NCuZn39Pb2CZ120,
CZ128
150-450360-580 40-590-16080HRHMRHMHMRHMRHMRHMGood machinability and some cold workability for limited bending and riveting.
CW613NCuZn39Pb2Sn150-420360-580 30-590-15075HMHMRHMGood machinability and limited cold workability.
CW614NCuZn39Pb3CZ121Pb3150-420360-580 25-5100-160100HMRHMHMRHMRHMRHMHMRExcellent machinability but very limited cold workability. Alloy CW614N is rated as a standard against which other materials are compared.
CW615NCuZn39Pb3Sn130-160340-380 20-1285-9595Hot forging.
CW616NCuZn40Pb1Al130-160340-380 20-1285-9560HMHMHot forging.
CW617NCuZn40Pb2CZ122150-420360-580 25-5100-16090HMRHMHMRHMRHMRHMHMRExcellent machinability but very limited cold workability. Alloy CW617N is the standard hot forging brass.
CW618NCuZn40Pb2Al90Profiles by hot extrusion. Aluminium imparts a golden lustre, avoiding need for further polishing. The alloys with more than 1.6% Pb have very good machinability.
CW619NCuZn40Pb2Sn150-420360-580 25-5100-16085Good machinability and limited cold workability.
CW620NCuZn41Pb1Al85MProfiles by hot extrusion. Aluminium imparts a golden lustre, avoiding need for further polishing. The alloys with more than 1.6% Pb have very good machinability.
CW621NCuZn42PbAl55Profiles by hot extrusion. Aluminium imparts a golden lustre, avoiding need for further polishing.
CW622NCuZn43Pb1Al60Profiles by hot extrusion. Aluminium imparts a golden lustre, avoiding need for further polishing. The alloys with more than 1.6% Pb have very good machinability.
CW623NCuZn43Pb2CZ130150-220350-420 30-20100-13095HMRProfiles by hot extrusion. Aluminium imparts a golden lustre, avoiding need for further polishing. The alloys with more than 1.6% Pb have very good machinability.
CW624NCuZn43Pb2AlCZ13095MProfiles by hot extrusion. Aluminium imparts a golden lustre, avoiding need for further polishing. The alloys with more than 1.6% Pb have very good machinability.
CW625NCuZn35Pb1.5AlAs200 - 250280 - 400 30 - 570-135MRHMHMRHMRHMDZR with good machinability. Approved for drinking water contact under 4MS.
CW626NCuZn33Pb1.5AlAs200 - 250280 - 400 30 - 570-135MRHMHMRHMRHMDZR with good machinability. Approved for drinking water contact under 4MS.
Wrought Copper-zinc-lead Alloys (Leaded Brasses)—Properties and Standardsopperalliance.org.uk

Table Notes:
1652, 12167 and 12449 are for general purposes.
1N/mm2 = 1MPa

H—mandatory hardness
M—as manufactured
R—mandatory tensile strength

EN12167 Mechanical properties of profiles are not specified in this standard, indicated as M