Brass Sheet, Strip and Plate—Compositions, Properties and Standards

Brasses are a very versatile family of alloys. Based on copper-zinc, additional alloying elements can be used to increase strength, improve corrosion resistance (especially with respect to seawater) and to improve machinability.

Compositions given are the EN materials appropriate to designation number. Composition ranges may be outside those of previous BS specifications, therefore compliance should be checked before assuming suitability for applications. The compositions are shown as either a range or maximum for individual elements. 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.

This table includes brasses previously included in BS 2870 ‘Specification for rolled copper and copper alloys: sheet, strip and foil’ and BS 2875 ‘Specification of copper and copper alloys: plate’.

These brasses are now included in the following EN standards for individual product forms:

  • EN 1652 ‘Copper and copper alloys—Plate, sheet, strip and circles for general purposes’
  • EN 1653 ‘Copper and copper alloys—Plate, sheet and circles for boilers, pressure vessels and hot water storage units’
  • EN 1654 ‘Copper and copper alloys—Strip for springs and connectors’
  • EN 1172 ‘Copper and copper alloys—Sheet and strip for building purposes’

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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Brass Sheet, Strip and Plate—Compositions, Properties and Standards

EN
Number
EN
Symbol
Nearest
Old BS
Equiv.
Cu
%
Al
%
Pb
%
Others
%
Zinc
%
0.2%
Proof
Strength
(N/mm2)
Tensile
Strength
(N/mm2)
Elongation
%

Hardness
(HV)

Remarks
CW500LCuZn5CZ12594.0-96.00.020.050.3 NiRem.130-280230-34045-845-11057% IACS. Very good cold working. Used for ordnance, connectors, contacts, shell casings, detonator caps.
CW501LCuZn10CZ10189.0-91.00.020.050.3 NiRem.140-290240-35045-450-11044% IACS. Very good cold working. Used for architectural metalwork, imitation jewellery on account of golden colours and ability to be brazed and enamelled. Ordance, lead frames, detonator caps, waves guides, shell casings. Gilding metal.
CW502LCuZn15CZ10284.0-86.00.020.050.3 NiRem.170-360260-41045-455-13543% IACS. Very good cold working properties. Used for architectural metalwork, imitation jewellery on account of golden colours and ability to be brazed and enamelled. Contacts, radiators, conduits, heat exchangers. Gilding metal.
CW503LCuZn20CZ10379.0-81.00.020.050.3 NiRem.110-440270-48048-555-15533% IACS. Very good cold working properties. Used for architectural metalwork, imitation jewellery on account of golden colours and ability to be brazed and enamelled. Gilding metal.
CW505LCuZn30CZ10669.0-71.00.020.050.3 NiRem.110-430270-49040-955-15029% IACS. 70/30 Deep drawing cartridge brass having maximum ductility of the Cu-Zn alloys.
CW506LCuZn3366.0-68.00.020.050.3 NiRem130-450280-50040-655-15528% IACS. Good cold working for deep drawing and cold forging.
CW507LCuZn36CZ10763.5-65.50.020.050.3 NiRem.110-500300-55038-355-17026% IACS. 2/1 brass. A good cold working alloy.
CW508LCuZn37CZ10862.0-64.00.020.10.3 NiRem.110-500300-55038-355-17026% IACS. General purpose alloy suitable for simple forming.
CW509LCuZn40CZ10959.0-61.50.050.20.3 NiRem.200-390340-48033-685-140Good hot working alloys which can also be cold worked to a limited extent. Muntz metal.
CW600NCuZn35Pb1CZ11862.5-64.00.050.8-1.60.3 NiRem.200-490290-54050-560-170Leaded clock brass. Machinable and good cold working.
CW604NCuZn37Pb0.562.0-64.00.050.1-0.80.3 NiRem200-490290-54050-560-170Excellent cold working, can be machined. Used for components which are coined, riveted, crimped or flanged and to a small extent, machined.
CW606NCuZn37Pb2CZ11961.0-62.00.051.6-2.50.3 NiRem200-490290-54050-560-170Good machinability, limited cold working & riveting.
CW608NCuZn38Pb2 CZ12060.0-61.0
0.051.6-2.5
0.3 NiRem. 200-490340-54043-575-170Leaded clock brass. In the hard condition can be accurately punched to shape with a minimum of 'burr', hence major use as pinions for clocks, watches and instruments. Also suitable for engraving. Limited bending.
CW610NCuZn39Pb0.5CZ137
59.0-60.50.050.2-0.80.3 NiRem.200-490340-54043-575-170Leaded Muntz Metal, machinable. Used for tube plates of condensers, support sheets and baffles. Available as plate.
CW612NCuZn39Pb2CZ12859.0-60.00.051.6-2.50.3 NiRem270-510360-56040-990-175Leaded brass. In the hard condition, can be accurately punched to shape with a minimum of "bur" hence major use as pinions for clocks, watches and instruments. Also suitable for engraving. Limited bending.
CW702RCuZn20Al2AsCZ11076.0-79.01.8-2.30.050.02-0.06 As
0.1 Ni
Rem.90-240330-39030-2570-100The addition of aluminium produces enhanced corrosion resistance to sea water. Used for header tanks and tube plates. Available as plate.
CW703RCuZn23Al3Co72.0-75.03.0-3.80.050.25-0.55 Co
0.3 Ni
Rem580-780660-82010-2190-23517% IACS. High strength strip for springs and connectors. BS EN 1654.
CW715RCuZn38AlFeNiPbSn59.0-60.70.1-0.50.3-0.70.05 As
0.1-0.4 Fe
0.2-0.5 Ni
0.3-0.6 Sn
Rem140-200390-43025-20110-120Available as plate.
CW717RCuZn38Sn1As59.0-62.00.20.02-0.06 As
0.2 Ni
0.5-1.0 Sn
Rem100-200320-40030-1880-110Available as plate aluminium brass.
CW719RCuZn39Sn159.0-61.00.20.2 Ni
0.5-1.0 Sn
Rem100-200320-40030-1880-110Available as plate naval brass.
Brass Sheet,
Strip and Plate
—Compositions,
properties
and uses
copperalliance.org.uk

Table Notes:
Compositions are given as either a range or a maximum.
1N/mm2 = 1MPa