Wrought, Complex Copper-Zinc Alloys (Special Brasses)—Compositions, Properties, Standards and Uses

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

Information is split into two tables, both ordered by alloy description and 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 and relevant BS EN standards. The material conditions defined by the standards are given and—where mandatory—this is indicated.

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

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Wrought, Complex, Copper-zinc Alloys (Special Brasses)—Compositions and Uses

DescriptionEN
Number
EN
Symbol
Nearest
Old BS
Equiv.
Cu
%
Al
%
Fe
%
Mn
%
Pb
%
Si
%
Sn
%
Others
%
Zn
%
Characteristics and Uses
Corrosion Resistant AlloysCW700RCuZn13Al1Ni1Si1CZ12781.0-84.00.7-1.20.250.10.050.8-1.30.10.8-1.4 NiRem.Arsenic gives dezincification resistance tin corrosion resistance and lead machinability. Seawater resistant alloy for condenser plates and tubes, and heat exchangers. Offshore aplications.
Corrosion Resistant AlloysCW702RCuZn20Al2AsCZ11076.0-79.01.8-2.30.070.10.05--0.02-0.06 As
0.1 Ni
Rem.Arsenic gives dezincification resistance tin corrosion resistance and lead machinability. Seawater resistant alloy for condenser plates and tubes, and heat exchangers. Offshore aplications.
Corrosion Resistant AlloysCW706RCuZn28Sn1AsCZ11170.0-72.5-0.070.10.05-0.9-1.30.02-0.06 As
0.1 Ni
Rem.Arsenic gives dezincification resistance tin corrosion resistance and lead machinability. Seawater resistant alloy for condenser plates and tubes, and heat exchangers. Offshore aplications.
Corrosion Resistant AlloysCW707RCuZn30AsCZ12669.0-71.00.020.050.10.07-0.050.02-0.06 AsRem.Arsenic gives dezincification resistance tin corrosion resistance and lead machinability. Seawater resistant alloy for condenser plates and tubes, and heat exchangers. Offshore aplications.
Corrosion Resistant AlloysCW709RCuZn32Pb2AsFeSi-64.0-66.50.050.1-0.2-1.5-2.20.45-0.80.30.03-0.08 As
0.3 Ni
Rem.Arsenic gives dezincification resistance tin corrosion resistance and lead machinability. Seawater resistant alloy for condenser plates and tubes, and heat exchangers. Offshore aplications.
Corrosion Resistant AlloysCW711RCuZn36Pb2Sn1CZ13459.5-61.5-0.1-1.3-2.2-0.5-1.00.3 NIRem.Arsenic gives dezincification resistance tin corrosion resistance and lead machinability. Seawater resistant alloy for condenser plates and tubes, and heat exchangers. Offshore aplications.
Corrosion Resistant AlloysCW712RCuZn36Sn1PbCZ11261.0-63.0-0.1-0.2-0.6-1.0-1.50.2 NiRem.Arsenic gives dezincification resistance tin corrosion resistance and lead machinability. Seawater resistant alloy for condenser plates and tubes, and heat exchangers. Offshore aplications.
Corrosion Resistant AlloysCW714RCuZn37Pb1Sn1-59.0-61.0-0.1-0.4-1.0-0.5-1.00.3 NiRem.Arsenic gives dezincification resistance tin corrosion resistance and lead machinability. Seawater resistant alloy for condenser plates and tubes, and heat exchangers. Offshore aplications.
Corrosion Resistant AlloysCW715RCuZn38AlFeNiPbSn-59.0-60.70.1-0.50.1-0.4-0.3-0.7-0.3-0.60.05 As
0.2-0.5 Ni
Rem.Arsenic gives dezincification resistance tin corrosion resistance and lead machinability. Seawater resistant alloy for condenser plates and tubes, and heat exchangers. Offshore aplications.
Corrosion Resistant AlloysCW717RCuZn38Sn1As-59.0-62.0-0.1-0.2-0.5-1.00.02-0.06 As
0.2 Ni
Rem.Arsenic gives dezincification resistance tin corrosion resistance and lead machinability. Seawater resistant alloy for condenser plates and tubes, and heat exchangers. Offshore aplications.
Corrosion Resistant AlloysCW719RCuZn39Sn1CZ13359.0-61.0-0.1-0.2-0.5-1.00.2 NiRem.Arsenic gives dezincification resistance tin corrosion resistance and lead machinability. Seawater resistant alloy for condenser plates and tubes, and heat exchangers. Offshore aplications.
High Tensile BrassesCW704RCuZn23Al6Mn4Fe3Pb-63.0-65.05.0-6.02.0-3.53.5-5.00.2-0.80.20.20.5 NiRem.High strength structural materials.
High Tensile BrassesCW705RCuZn25Al5Fe2Mn2PbCZ11665.0-68.04.0-5.00.5-3.00.5-3.00.2-0.8-0.21.0 NIRem.High strength structural materials.
High Tensile BrassesCW708RCuZn31Si1-66.0-70.0-0.4-0.80.7-1.3-0.5 NiRem.Silicon gives wear resistance. Bearings and bushes.
High Tensile BrassesCW710RCuZn35Ni3Mn2AlPb-58.0-60.00.3-1.30.51.5-2.50.2-0.80.10.52.0-3.0 NiRem.High strength structural materials.
High Tensile BrassesCW713RCuZn37Mn3Al2PbSiCZ13557.0-59.01.3-2.31.01.5-3.00.2-0.80.3-1.30.41.0 NiRem.Silicon gives wear resistance. Bearings and bushes.
High Tensile BrassesCW718RCuZn39Mn1AlPbSi-57.0-59.00.3-1.30.50.8-1.80.2-0.80.2-0.80.50.5 NiRem.Silicon gives wear resistance. Bearings and bushes.
High Tensile BrassesCW721RCuZn40Mn1Pb1AlFeSnCZ11457.0-59.00.3-1.30.2-1.20.8-1.80.8-1.6-0.2-1.00.3 NiRem.High strength structural materials.
High Tensile BrassesCW722RCuZn40Mn1Pb1FeSnCZ11556.5-58.50.10.2-1.20.8-1.80.8-1.6-0.2-1.00.3 NiRem.High strength structural materials, suitable for brazing.
Other BrassesCW701RCuZn19Sn-80.0-82.0-0.05-0.05-0.2-0.50.3 NiRem.Not included in any BS EN product standard
Other BrassesCW703RCuZn23Al3Co-72.0-75.03.0-3.80.05-0.05-0.10.25-0.55 Co
0.3 Ni
Rem.Springs and connectors.
Other BrassesCW716RCuZn38Mn1Al-59.0-61.50.3-1.31.00.6-1.81.00.50.30.6 NiRem.Good sliding properties due to Mn & Al. Medium strength structural materials.
Other BrassesCW720RCuZn40Mn1Pb1CZ13657.0-59.00.20.30.5-1.51.0-2.00.10.30.6 NiRem.Good sliding properties due to Mn & Al. Medium strength structural materials.
Other BrassesCW723RCuZn40Mn2Fe1-56.5-58.50.10.5-1.51.0-2.00.50.10.30.6 NiRem.Good sliding properties due to Mn & Al. Medium strength structural materials.
Other BrassesCW724RCuZn21Si3P-75.0-77.00.050.30.050.102.7-3.50.30.2 Ni
0.02-0.10 P
Rem.Lead free, free machining.
Other BrassesCW725RCuZn33Pb1AlSiAs-64.0-67.00.1-0.40.30.10.4-0.90.1-0.30.30.05-0.08 As
0.2 Ni
Rem.DZR. Approved for drinking water contact under 4MS.
Wrought, Complex,
Copper-zinc Alloys
(Special Brasses)—
Compositions and
Uses
copperalliance.org.uk

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

Wrought, Complex, Copper-zinc Alloys (Special Brasses)—Properties and Standards

DescriptionEN
Number
EN
Symbol
0.2%
Proof
Strength
(N/mm2)
Tensile
Strength
(N/mm2)
Elongation
(%)
Hardness
(HV)
1652
Plate, Sheet, Strip, Circles
For general purposes
1653
Plate, Sheet, Circles
For boilers, pressure vessels and hot water storage units
12163
Rod
For general purposes
12164
Rod for Free-machining
12165
Forging Stock
12167
Profiles, Rectangular Bar
For general purposes
12168
Hollow Rod for Free-machining
12420
Forgings
12449
Tubes
For general purposes
Characteristics and Uses
Corrosion Resistant AlloysCW700RCuZn13Al1Ni1Si1120-350400-58050-1070-180HMRArsenic gives dezincification resistance tin corrosion resistance and lead machinability. Seawater resistant alloy for condenser plates and tubes, and heat exchangers. Offshore aplications.
Corrosion Resistant AlloysCW702RCuZn20Al2As140-380340-54060-2080-160HRRHMRArsenic gives dezincification resistance tin corrosion resistance and lead machinability. Seawater resistant alloy for condenser plates and tubes, and heat exchangers. Offshore aplications. Tubes for heat exchangers BS EN 12451 and finned tubes for heat exchangers BS EN 12452 (conditions HR).
Corrosion Resistant AlloysCW706RCuZn28Sn1As110-410320-46060-2080-160Arsenic gives dezincification resistance tin corrosion resistance and lead machinability. Seawater resistant alloy for condenser plates and tubes, and heat exchangers. Offshore aplications. Tubes for heat exchangers BS EN 12451 and finned tubes for heat exchangers BS EN 12452 (conditions HR).
Corrosion Resistant AlloysCW707RCuZn30As110-410320-46060-2080-160Arsenic gives dezincification resistance tin corrosion resistance and lead machinability. Seawater resistant alloy for condenser plates and tubes, and heat exchangers. Offshore aplications. Tubes for heat exchangers BS EN 12451 (conditions HR).
Corrosion Resistant AlloysCW709RCuZn32Pb2AsFeSi200-300380-45025-12115-145MRHMHMRHMArsenic gives dezincification resistance tin corrosion resistance and lead machinability. Seawater resistant alloy for condenser plates and tubes, and heat exchangers. Offshore aplications.
Corrosion Resistant AlloysCW711RCuZn36Pb2Sn1200-400360-54030-5110-160Arsenic gives dezincification resistance tin corrosion resistance and lead machinability. Seawater resistant alloy for condenser plates and tubes, and heat exchangers. Offshore aplications.
Corrosion Resistant AlloysCW712RCuZn36Sn1Pb160-360340-48030-1090-150HMRHMHMRHMArsenic gives dezincification resistance tin corrosion resistance and lead machinability. Seawater resistant alloy for condenser plates and tubes, and heat exchangers. Offshore aplications. Wire BS EN 12166 (conditions HMR).
Corrosion Resistant AlloysCW714RCuZn37Pb1Sn1200-400360-54030-5110-160Arsenic gives dezincification resistance tin corrosion resistance and lead machinability. Seawater resistant alloy for condenser plates and tubes, and heat exchangers. Offshore aplications.
Corrosion Resistant AlloysCW715RCuZn38AlFeNiPbSn160-220400-46025115-130RArsenic gives dezincification resistance tin corrosion resistance and lead machinability. Seawater resistant alloy for condenser plates and tubes, and heat exchangers. Offshore aplications.
Corrosion Resistant AlloysCW717RCuZn38Sn1As130-230320-43035-2080-120RArsenic gives dezincification resistance tin corrosion resistance and lead machinability. Seawater resistant alloy for condenser plates and tubes, and heat exchangers. Offshore aplications.
Corrosion Resistant AlloysCW719RCuZn39Sn1160-360340-48030-10190-210RHMRHMHMRHMArsenic gives dezincification resistance tin corrosion resistance and lead machinability. Seawater resistant alloy for condenser plates and tubes, and heat exchangers. Offshore aplications.
High Tensile BrassesCW704RCuZn23Al6Mn4Fe3Pb500-540700-80010190-210HMRHMHMHigh strength structural materials.
High Tensile BrassesCW705RCuZn25Al5Fe2Mn2Pb300-400550-65012150-200HMHigh strength structural materials.
High Tensile BrassesCW708RCuZn31Si1250-350460-56025-10120-160HMRHMRSilicon gives wear resistance. Bearings and bushes.
High Tensile BrassesCW710RCuZn35Ni3Mn2AlPb250-350450-55015120-150HMRHMHMRHMHMRHigh strength structural materials.
High Tensile BrassesCW713RCuZn37Mn3Al2PbSi300-450550-65025-8170-210HMRHMHMRHMRHMHMRSilicon gives wear resistance. Bearings and bushes.
High Tensile BrassesCW718RCuZn39Mn1AlPbSi250-350440-54020-10120-170HMRSilicon gives wear resistance. Bearings and bushes.
High Tensile BrassesCW721RCuZn40Mn1Pb1AlFeSn200-380450-58030-15130-170HMRHMHMRHMRHMHigh strength structural materials.
High Tensile BrassesCW722RCuZn40Mn1Pb1FeSn200-380450-58030-15130-170HMRHMHMRHMRHMHigh strength structural materials, suitable for brazing.
Other BrassesCW701RCuZn19Sn350-90055-3570-180Not included in any BS EN product standard
Other BrassesCW703RCuZn23Al3Co600-800660-88012-4200-250Strip for springs, connectors BS EN 1654 (conditions HR)
Other BrassesCW716RCuZn38Mn1Al200-350450-57020-8130-160HMRGood sliding properties due to Mn & Al. Medium strength structural materials.
Other BrassesCW720RCuZn40Mn1Pb1160-350350-55020-10100-170HMRHMHMRHMRHMGood sliding properties due to Mn & Al. Medium strength structural materials. Wire BS EN 12166 (conditions HMR).
Other BrassesCW723RCuZn40Mn2Fe1160-320350-55020-8100-160HMRGood sliding properties due to Mn & Al. Medium strength structural materials.
Other BrassesCW724RCuZn21Si3P350-450500-65015-10110-210HMRHMRHMHMRHMRHMHMRLead free, free machining. Wire BS EN 12166 (conditions HMR).
Other BrassesCW725RCuZn33Pb1AlSiAs200-250290-40030-1070-135HMRHMHMRHMRHMDZR. Approved for drinking water contact under 4MS.
Wrought, Complex, Copper-zinc Alloys (Special Brasses)—Standardscopperalliance.org.uk

Table Notes:
1652, 12163, 12167 and 12449 are for general purposes.
1653 is for boilers, pressure vessels and hot water storage units.
1N/mm2 = 1MPa

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