NES/DEFSTAN 02-837 data sheet | Amari Precision Tubes

This Defence Standard (DEF STAN) 02-837 specifies the requirements for the manufacture, inspection, testing and supply of copper tubes that meet the requirements for phosphorus deoxidised non-arsenical copper conforming to the chemical composition of BS EN 12449:1999, CW024A.

C106 / CW024A is phosphorous de-oxidised non-arsenical copper that is 99.9% pure.

Applications
C106 is typically used in applications like:
~ Refrigeration
~ Gutters and roofing
~ Gas plants
~ Hydraulic, air and oil lines
~ Air Conditioning and refrigeration
~ Heater units and burners tubes Consumer
~ Plumbing pipe and fittings

Chemical Composition

EN 1652:1997 CW024A
Chemical Element	% Present
Others (Total)	0.1 max
Copper (Cu)	99.9 min

Alloy Designations

C106/CW024A Copper corresponds to the following designations but may not be a direct equivalent:

UNS C12200

ISO Cu-DHP

Supplied Forms

C106/CW024A is typically supplied as Round tube, Half Hard Sheet and Soft Sheet.

Sheet
Tube
Plate

Generic Physical Properties

Physical Property	Value
Density	8.92 g/cm³
Melting Point	1083 °C
Thermal Expansion	16.9 x10^-6 /K
Modulus of Elasticity	117 GPa
Thermal Conductivity	391.2 W/m.K
Electrical Resistivity	0.0203 x10^-6 Ω .m

Mechanical Properties

EN 1652:1997 Sheet - 0.2mm to 15mm thick
Mechanical Property	Value
Proof Stress	50-340 MPa
Tensile Strength	200-360 MPa
Elongation A50 mm	50-5 %
Hardness Vickers	40 to 110 HV

Mechanical properties vary widely according to condition (soft/half hard/etc)

Weldability

Deoxidation of C106 / CW024A improves embrittlement resistance during welding.

Brazing and soldering are both excellent joining methods for C106 / CW024A. Gas shielded arc welding is also excellent. Oxyacetylene welding and butt welding are good. Welding methods not recommended include:

~ Coated metal arc welding

~ Spot welding

~ Seam welding

Hot Working

With forging of brass rated as 100, the hot forgeability of C106 / CW024A is rated at 65. Hot working temperatures should be between 760 and 870°C

Heat Treatment

Solution treatment or annealing can be done by rapid cooling after heating to 370-650°C.

Corrosion Resistance

Corrosion resistance is either good or excellent in most environments and atmospheres other than those containing ammonia ions.

Cold Working

C106 / CW024A has an excellent response to cold working.

Machinability

This alloy has a machinability rating of 20 when Brass CZ121 / CW614N is 100.

Last Updated: 18 July 2019

Disclaimer

This Data is indicative only and as such is not to be relied upon in place of the full specification. In particular, mechanical property requirements vary widely with temper, product and product dimensions. All information is based on our present knowledge and is given in good faith. No liability will be accepted by the Company in respect of any action taken by any third party in reliance thereon.

Please note that the 'Datasheet Update' date shown above is no guarantee of accuracy or whether the datasheet is up to date.

The information provided in this datasheet has been drawn from various recognised sources, including EN Standards, recognised industry references (printed & online) and manufacturers' data. No guarantee is given that the information is from the latest issue of those sources or about the accuracy of those sources.

Material supplied by the Company may vary significantly from this data, but will conform to all relevant and applicable standards.

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, whether expressed or implied.

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. All transactions are subject to the Company's current 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.

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