C18000 - Copper Alloys

Equivalent Specifications

ASTM B C18000
RWMA Class 111

Key Features

A high copper alloy with small additions of nickel and silicon, that can be heat treated by quench and precipitation hardening and is able to be cold worked

Typical Uses

A high copper alloy with extremely good electrical and heat conductivity that is strengthened by heat treatment.

Electrical/welding: The main application is for welding electrodes and electrical connectors which require higher mechanical properties. Copper chrome silicon nickel alloy is typically used in resistance welding tips, resistance welding wheels and fixtures, stud welding collets and tips.

Plastic and metal mould industry: Heat sink inserts in steel plastic moulds, blow pins, pinch offs, mould cavities for blow moulds, hot runner systems for injection moulds, cores, core & ejector pins for injection moulds, plunger tips for metal die casting machines.

Description	Copper Nickel Silicon Chromium
Nominal Composition	CuNi2SiCr
Alloy Type	wrought

Typical Mechanical Properties

Tensile Strength (N/mm²)	675
Proof/Yield Strength (N/mm²)	520
Elongation (%)	14
Hardness Brinell	185
Impact Izod J20°C

Typical Physical Properties

Density g/cm³	8.81
Melting Temperature Range °C	1020 - 1040
Thermal Conductivity W/mK	225
Electrical Resistivity μΩ.m15°C	3.8
Coefficient of Thermal Expansion 0-250°C	17.5
Relative Magnetic Permeability	1.01
Coefficient of Friction

Copper Alloys has the ability to modify existing alloys for improved performance. Many customers have benefited from this in the past.

To discuss your requirements, call a member of Copper Alloys’s technical team on +44 (0) 1782-816888, or email [email protected].

This Data is indicative only and must not be seen as a substitute for the full specification from which it is drawn. In particular, the mechanical property requirements vary widely with tempeter, product and product dimensions. The information is based on our present knowledge and is given in good faith. However, no liability will be accepted by the Company in respect of any action taken by any third party in reliance thereon.

As the products detailed may be used for a wide variety of purposes and as the Company has no control over their use; the Company specifically excludes all conditions or warranties expressed or implied by statute or otherwise as to dimensions, properties and/or fitness for any particular purpose.

Any advice given by the Company to any third party is given for that party’s assistance only and without liability on the part of the Company. Any contract between the Company and a customer will be subject to the Company’s Conditions of Sale. The extent of the Company’s liabilities to any customer is clearly set out in those Conditions, a copy of which is available on request.