NF L 14 708 - Copper Alloys

A French AFNOR aerospace specification for high strength manganese bronze CuZn23Al4.The alloy has lower mechanical and hardness properties than CuZn19Al6 but has greater ductility. It also exhibits good wear properties and corrosion resistance.The alloy also meets DIN 1709.

Equivalent Specifications

NF L14 708
UZ23A4
ASTM B 138 C67000 Alloy B
ASTM B 271 C86200
SAE J461 CA670
SAE J463
NF A 53707:1987
DIN 1709 2.0500
ASNA 3404C CuZn23Al4
BS EN 12163:1998
BS EN 12165:1998
BS EN 12420:1999

Key Features

A complex Copper Zinc alloy commonly known as Manganese Bronze with additions of manganese, aluminium and iron to improve the tensile strength and corrosion resistance.

It is one of the highest strength copper zinc alloys and has good wear resistance in bearing applications.

Typical Uses

Mechanical – The alloy has high hardness with good bearing and wear properties.

Wear plates, cams,bushes,bearings,worm wheels and pins.

Description	Manganese Bronze
Nominal Composition	CuZn23Al4
Alloy Type	wrought

Typical Mechanical Properties

Tensile Strength (N/mm²)	470
Proof/Yield Strength (N/mm²)	724
Elongation (%)	5
Hardness Brinell
Impact Izod J20°C

Typical Physical Properties

Density g/cm³	7.8
Melting Temperature Range °C	905 - 930
Thermal Conductivity W/mK	40
Electrical Resistivity μΩ.m15°C	18
Coefficient of Thermal Expansion 0-250°C	17
Relative Magnetic Permeability	1.2
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.