A lead free naval brass which is basically a 60/40 copper zinc alloy with the addition of 1% Sn for corrosion resistance in sea water. The alloy meets the requirements of ASTM B 21 C46400 Alloy A , ASTM B 124 C46400, AMS 4611, AMS 4612 and QQ-B-639. This alloy is also noted for its resistance to wear, fatigue, galling, and stress corrosion cracking.

Equivalent Specifications

ASTM B 124 C46400
ASTM B21 C46400
ASTM B171 C46400
BS 2874 CZ133
CW719R

Key Features

A copper zinc alloy with a small addition of tin to aid corrosion resistance. The alloy is a single alpha phase and has good ductility.

This naval brass was originally used in marine applications and has good corrosion resistance in moderately polluted river water and clean sea water. The alloy is widely used in heat exchange equipment with moderate operating conditions.

Typical Uses

Chemical and mechanical: The alloy is used for condenser tubes, tubeplates and other heat exchange components – principally for oil refineries and power stations.

Description Naval Brass
Nominal Composition CuZn40Sn
Alloy Type wrought

Typical Mechanical Properties

Tensile Strength (N/mm²) 380
Proof/Yield Strength (N/mm²) 170
Elongation (%) 33
Hardness Brinell
Impact Izod J20°C

Typical Physical Properties

Density g/cm³ 8.4
Melting Temperature Range °C 885 - 900
Thermal Conductivity W/mK 116
Electrical Resistivity μΩ.m15°C 6.5
Coefficient of Thermal Expansion 0-250°C 21.2
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].

Contact

+44 (0) 1782 816888

[email protected]

Auckland Street, Stoke-on-Trent, ST6 2AZ, United Kingdom