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Engineered metals
for precision industries

Data sheet - L49

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L49
CuNi9Sn2

Cu reste Ni8.5-10.5 Sn1.8-2.8 Pb0.03 max

Chemical composition

CuBAL

Ni8.5-10.5

Zn0.5 max

Pb0.03 max

Sn1.8-2.8

Fe0.6 max

Mn0.2 max

Alloy name
RLSA no.540
EN standardCW351H
DIN standard2.0875
UNS no.*C72500

*Unified Numbering System (USA)

Characteristics and main uses

Physical properties Units
Density (20°C) 8,89 Kg/dm³
Melting point 1060-1130 °C
Longitudinal elasticity modulus 140 GPa
Thermal conductivity W/m·K
Electrical conductivity >4.64 m/Ω·mm²
Electrical resistivity <0.2155 µΩ·m
Linear expansion Coefficient 17,6 10⁻⁶·K⁻¹
IACS (International Annealed Copper Standard) 11 %
Poisson's ratio 0,34
Capabilities
Corrosion resistance2
Hot deformation3
Cold deformation4
Electrodepositing4
Diamond cutting4
Nitriding
Mechanical polishing3
Welding without filler3
Brazing3

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

Heat Treatment / Hardening
Annealing temperature 500-590 °C
Temperature for stress relief treatment °C
Hardening temperature °C
Hardening treatment time hour(s)

Alloy mechanical properties

L49
Possible hardness range 75 - 200 HV
Possible Rm range 340 - 600 MPa

Non-exhaustive list of grades

Grade Condition 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
H075 75 - 110
H110 110 - 150
H140 140 - 170
H160 160 - 190
H180 180 - 210
H190 ≥ 190
R340 340 - 410 ≤ 250 ≥ 30 50
R380 380 - 470 ≥ 200 ≥ 10 50
R450 450 - 530 ≥ 370 ≥ 6 50
R500 500 - 580 ≥ 450 ≥ 3 50
R560 560 - 650 ≥ 520 ≥ 2 50
R610 ≥ 610 ≥ 580

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

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Packaging
EN10204 certificate