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Engineered metals
for precision industries

Data sheet - CuZn30 Deco

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CuZn30 Deco
LAITON

Cu69-71 Zn reste Pb 0.0035 max

Chemical composition

Cu69-71

Ni0.015 max

ZnBAL

Pb0.0035 max

Sn0.015 max

Fe0.015 max

S0.0012 max

Alloy name
RLSA no.331
EN standardEN‎CW505L‎
DIN standard
UNS no.*C26000

*Unified Numbering System (USA)

Characteristics and main uses

Alliage spécial CuZn30, bien adapté aux pièces décoratives présentant des exigences de surface élevées, notamment après galvanisation à l'or, au palladium et au rhodium. L'alliage est adapté au diamantage et donc dédié à l'industrie horlogère, en particulier aux aiguilles, cadrans et autres pièces décoratives.

CuZn30 est un alliage de cuivre renforcé en solution solide contenant 30% de zinc (laiton). Cet alliage présente de très bonnes propriétés de formage à froid.

Main uses

Pièces décoratives pour l'industrie horlogère, la bijouterie

Physical properties Units
Density (20°C) 8.53 Kg/dm³
Melting point 954 °C
Longitudinal elasticity modulus 110 GPa
Thermal conductivity W/m·K
Electrical conductivity 16 m/Ω·mm²
Electrical resistivity <0.0784 µΩ·m
Linear expansion Coefficient 19.7 10⁻⁶·K⁻¹
IACS (International Annealed Copper Standard) >28 %
Poisson's ratio
Capabilities
Corrosion resistance3
Hot deformation4
Cold deformation4
Electrodepositing
Diamond cutting4
Nitriding
Mechanical polishing4
Welding without filler
Brazing

1 poor | 2 average | 3 good | 4 very good | - no info

Heat Treatment / Hardening
Annealing temperature 450-650 °C
Temperature for stress relief treatment 190-290 °C
Hardening temperature °C
Hardening treatment time hour(s)

Alloy mechanical properties

CuZn30 Deco
Possible hardness range 55-200 HV
Possible Rm range 270-630 MPa

Non-exhaustive list of grades

Grade According to standard Hardness
(HV: Vickers)
min - max
Rm
(MPa)
min - max
Rp 0.2
(MPa)
min - max
Elongation
(%) where L0 = 100mm
min - max
L0 Grain size
(µm)
min - max
R550 170-200 550-640 ≥‎530 ≥‎2
R480 150-180 480-560 ≥‎430 ≥‎4
R410 120-155 410-490 ≥‎260 ≥‎9
R350 95-125 350-430 ≥‎170 ≥‎21
R270 55-90 270-350 ≤‎160 ≥‎40
R630 ≥190 ≥‎630 ≥‎610 -

Do not hesitate to ask us for your specific grades and parameters. We can make productions according to your needs.

Contact us

Do not hesitate to contact us for a quote, any questions or advice. We will get back to you as soon as possible. 

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