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Engineered metals
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Data sheet - CuSn6

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CuSn6
BRONZE

Cu reste Sn5.5-7 Pb0.03 max

Chemical composition

CuBAL

Ni0.3 max

Zn0.3 max

Pb0.03 max

P0.01-0.35

Sn5.5-7

Fe0.1 max

Other0.2 max

Alloy name
RLSA no.506
EN standardCW452K
DIN standard2.1020
UNS no.*C51900

*Unified Numbering System (USA)

Characteristics and main uses

Le CuSn6 est un alliage de cuivre (bronze) composé de 6% d'étain. L'alliage a une résistance élevée et une bonne élasticité. Il est également bien adapté aux opérations de formage à froid. L'alliage est résistant à l'usure, a une très bonne résistance à la corrosion et peut être facilement soudé.

Physical properties Units
Density (20°C) 8,80 Kg/dm³
Melting point 900-1050 °C
Longitudinal elasticity modulus 118 GPa
Thermal conductivity W/m·K
Electrical conductivity >8 m/Ω·mm²
Electrical resistivity <0.125 µΩ·m
Linear expansion Coefficient 18,5 10⁻⁶·K⁻¹
IACS (International Annealed Copper Standard) >13 %
Poisson's ratio
Capabilities
Corrosion resistance2
Hot deformation1
Cold deformation4
Electrodepositing4
Diamond cutting4
Nitriding
Mechanical polishing3
Welding without filler3
Brazing2

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

Heat Treatment / Hardening
Annealing temperature 350-600 °C
Temperature for stress relief treatment 200-250 °C
Hardening temperature °C
Hardening treatment time hour(s)

Alloy mechanical properties

CuSn6
Possible hardness range 124 - 240 HV
Possible Rm range 370 - 820 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
H080 80 - 110
H125 125 - 165
H160 160 - 190
H180 180 - 210
H200 200 -230
H220 ≥ 220
R350 350 - 420 ≤ 300 ≥ 45 50
R420 420 - 520 ≥ 360 ≥ 17 50
R500 500 - 590 ≥ 460 ≥ 8 50
R560 560 - 650 ≥ 530 ≥ 5 50
R640 640 - 730 ≥ 610 ≥ 3 50
R720 ≥ 720 ≥ 690

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

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