CuSn8
BRONZE

Cu reste Sn7.5-8.5 Pb0.03 max

Chemical composition

CuBAL

Zn0.2 max

Pb0.03 max

P0.03-0.35

Sn7.5-8.5

Fe0.1 max

Alloy name
RLSA no.	508
EN standard	CW453K
DIN standard	2.1030
UNS no.*	C52100

*Unified Numbering System (USA)

Characteristics and main uses

CuSn8 is a copper (bronze) alloy composed of 8% tin. The alloy has high strength and good elasticity. It is also well suited for cold forming operations. The alloy is wear resistant, has very good corrosion resistance and can be easily welded.

Main uses

- Stamped parts

- Connectors

- Contact springs

- Relay springs

- Slide bearings

Corrosion Resistance

Resistant to seawater and industrial atmoshere.

Largely insensitive to stress corrosion cracking.

Physical properties		Units
Density (20°C)	8,80	Kg/dm³
Melting point	900-1050	°C
Longitudinal elasticity modulus	115	GPa
Thermal conductivity		W/m·K
Electrical conductivity	>7.5	m/Ω·mm²
Electrical resistivity	<0.133	µΩ·m
Linear expansion Coefficient	18,2	10⁻⁶·K⁻¹
IACS (International Annealed Copper Standard)	>13	%
Poisson's ratio

Capabilities
Corrosion resistance	3
Hot deformation	1
Cold deformation	4
Electrodepositing	4
Diamond cutting	4
Nitriding
Mechanical polishing	3
Welding without filler	3
Brazing	2

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

Heat Treatment / Hardening
Annealing temperature	450-600	°C
Temperature for stress relief treatment	200-250	°C
Hardening temperature		°C
Hardening treatment time		hour(s)

Alloy mechanical properties

CuSn8
Possible hardness range	90 - 240	HV
Possible Rm range	380 - 720	MPa

Non-exhaustive list of grades

Grade	Hardness (HV: Vickers) min - max	Rm (MPa) min - max	Rp 0.2 (MPa) min - max	Elongation (%) where L0 = 100mm min - max	L0
H090	90 - 120
H135	135 - 175
H170	170 - 200
H190	190 - 220
H210	210 - 240
H230	≥ 230
R370		370 - 450	≤ 300	≥ 50	50
R450		450 - 550	≥ 370	≥ 20	50
R540		540 - 630	≥ 470	≥ 13	50
R600		600 - 690	≥ 540	≥ 5	50
R660		660 - 750	≥ 620	≥ 3	50
R740		≥ 740	≥ 700

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

Engineered metals
for precision industries

Data sheet - CuSn8

CuSn8
BRONZE

Cu reste Sn7.5-8.5 Pb0.03 max

Characteristics and main uses

Main uses

Alloy mechanical properties

Non-exhaustive list of grades

Contact us

Engineered metals for precision industries

Data sheet - CuSn8

CuSn8BRONZE

Cu reste Sn7.5-8.5 Pb0.03 max

Characteristics and main uses

Main uses

Alloy mechanical properties

Non-exhaustive list of grades

Contact us

Engineered metals
for precision industries

CuSn8
BRONZE