EN 1652 Grade CuNi9Sn2 R450 – High Strength, Corrosion-Resistant Copper Alloy

CuNi9Sn2 (CW351H) is comparable to CuNi9Sn2, mat. no. 2.0875, acc. to DIN 17664 : 1983-12. To the comparable DIN-mark applies: The material shows high strength specific values as well as favorable tarnish-proofness and a very good stress relaxation behaviour in spring-hard condition. CuNi9Sn2 has sufficient electrical and thermal conductivity. Favorable corrosion resistance in natural resp. industrial atmosphere. Also resistance to different waters, humidity, non-oxidizing acids, bases and saline solutions. No risk of stress corrosion. Processing properties: warm forming: good cold forming: very good machinability: unfavorable hard soldering: very good soft soldering: very good gas-shielded welding: very good burnishing: very good Application: For elastic components in relay, pushbutton switchers, connectors and receptacles in communications engineering, in EDP-systems, in consumer electronics equipment and in automobile electronics, for switcher components, soldering tags and frames, boxes for electrical components, carrier plates for integrated circuits an for conductor board pens. For the electrolytically tinned strip the coatings (Sn bright, Sn matt, Sn fuzed, SnPb) are listed by the application (better solderability, better corrosion resistance, reduction of the electrical contact resistance, better appearance) in the DIN EN 14436 : 2004-11 (Table 5)

Properties

General

Property	Temperature	Value
Density	20.0 °C	8.89 - 8.9 g/cm³

Mechanical

Property	Temperature	Value
Elastic modulus	20.0 °C	140 GPa
Elongation A50	20.0 °C	4 - 6 %
Poisson's ratio	20.0 °C	0.34 [-]
Tensile strength	20.0 °C	450 - 530 MPa
Yield strength Rp0.2	20.0 °C	370 MPa

Thermal

Property	Temperature	Value	Comment
Coefficient of thermal expansion	100.0 °C	1.55E-5 1/K
	200.0 °C	1.59E-5 1/K
	300.0 °C	1.66E-5 1/K

Melting point		915 - 1240 °C	Typical for Wrought Copper Nickel Grade
Specific heat capacity	20.0 °C	370 J/(kg·K)
	100.0 °C	390 J/(kg·K)
	200.0 °C	410 J/(kg·K)

Thermal conductivity	20.0 °C	48 W/(m·K)
	100.0 °C	56 W/(m·K)
	200.0 °C	65 W/(m·K)

Electrical

Property	Temperature	Value
Electrical conductivity	20.0 °C	6.00E+6 - 6.40E+6 S/m
Specific Electrical conductivity		10 - 11 % IACS

Chemical properties

Property	Value
Iron	0.3 %
Lead	0.03 %
Manganese	0.3 %
Nickel	8.5 - 10.5 %
Tin	1.8 - 2.8 %
Zinc	0.05 - 0.1 %

EN 1652 Grade CuNi2Si M – High-Performance Copper Alloy for Superior Conductivity and Corrosion Resistance EN 1652 CuNi9Sn2 R500 – Premium High‑Strength, Corrosion‑Resistant Alloy

Metal