Engineered metals
for precision industries

Data sheet - CuNi12Zn25Pb

www.robertlaminage.com

MSDS (pdf) Quote request

CuNi12Zn25Pb
MAILLECHORT Pb

Cu60-63 Ni11-13 Zn reste Pb0.5-1.5

Chemical composition

Cu60-63

Ni11-13

ZnBAL

Pb0.5-1.5

Sn0.2 max

Fe0.3 max

Mn0.5 max

Other0.2 max

Alloy name
RLSA no.	490
EN standard	CW404J
DIN standard	CuNi12Zn25Pb1
UNS no.*	C79200

*Unified Numbering System (USA)

Characteristics and main uses

Le CuNi12Zn25Pb est un alliage nickel-argent contenant 12% de nickel et 25% de zinc. De part son ajout de plomb, il en fait un alliage adapté aux opérations d'usinage par enlèvement de copeaux. Il possède également de bonne propriété d'emboutissage ainsi qu'une bonne résistance à la corrosion

Main uses

Deep drawn parts, Tableware, Security keys, Cutlery, Watch movement parts

Physical properties		Units
Density (20°C)	8,67	Kg/dm³
Melting point	1020	°C
Longitudinal elasticity modulus	130	GPa
Thermal conductivity		W/m·K
Electrical conductivity	>4.35	m/Ω·mm²
Electrical resistivity	<0.23	µΩ·m
Linear expansion Coefficient	16	10⁻⁶·K⁻¹
IACS (International Annealed Copper Standard)	>7.5	%
Poisson's ratio	0,34

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

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

Heat Treatment / Hardening
Annealing temperature	550-750	°C
Temperature for stress relief treatment	450	°C
Hardening temperature		°C
Hardening treatment time		hour(s)

Alloy mechanical properties

CuNi12Zn25Pb
Possible hardness range	100 - 230	HV
Possible Rm range	480 - 800	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
H110	EN1652 (1997)	110 - 140
H130	EN1652 (1997)	130 - 160
H155	EN1652 (1997)	155 - 185
H180	EN1652 (1997)	180 - 200
H200	EN1652 (1997)	≥ 200
R380	EN1652 (1997)		380 - 470	≥ 260	(≥ 15)	50
R460	EN1652 (1997)		460 - 540	≥ 320	(≥ 6)	50
R530	EN1652 (1997)		530 - 610	≥ 420	(≥ 3)	50
R620	EN1652 (1997)		620 - 700	≥ 530
R700	EN1652 (1997)		≥ 700	≥ 630

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