Aluminium Bronzes
Wrought Aluminium Bronzes   Cast Aluminium Bronzes

Over the past 70 years, the use of aluminium bronze and its ability to withstand corrosion in sea water and other aggressive environments, has been well proven. In many cases it has been shown to be superior to stainless steels particularly under anaerobic or crevice corrosion conditions.

In addition, this family of alloys has other important properties including: high strength, non sparking, shock and wear resistance, good performance at cryogenic and elevated temperatures and some variations even have a low magnetic permeability. The alloys have a lower density than steel and other copper based alloys and therefore can offer weight savings for selected applications.

Brasses
High Tensile Brasses   Naval Brasses   Manganese Brasses   Nickel Silvers  Free Machining

This category covers a wide range of alloys which consist primarily of copper and zinc with additions of iron, tin, lead, manganese, silicon and aluminium. Although these alloys are of lower strength and corrosion resistance than the aluminium bronzes they do offer enhanced machining characteristics, and can be joined by soldering or brazing.

Welding and Brazing Alloys

To compliment the range of alloys produced by Bolton Manganese Bronze Ltd a number of welding and brazing alloys are manufactured which can be used to join similar materials or join the copper alloys to mild steel, cast iron and malleable iron.

High Conductivity/Mould Tool Alloys
High Conductivity Alloys  Mould Tool Alloys

This group of alloys is widely used for resistance welding and in applications where it is necessary to rapidly extract heat such as injection mould tools for plastics, or aluminium and zinc die castings.

Many of the alloys can be improved by precipitation hardening which gives increased strength and resistance to softening at elevated temperatures. Special alloys are used in high performance racing engines for valve guides and seats where heat extraction and wear resistance are vital.

Cast / Wrought Phosphor and Leaded Bronzes
Phosphor Bronzes  Gun Metals

A broad spectrum of alloys which have been well proven over the years. The phosphor bronze family is noted for its superb wear and bearing characteristics. A number of the variants can be cold worked to enhance their mechanical properties without detriment to the bearing attributes. Having a high copper content and alloyed with tin phosphor bronzes have excellent corrosion resistance. The gunmetals (leaded bronzes) on the other hand have first class corrosion resistance with reasonable bearing properties and contain varying amounts of:- tin, lead and zinc for different duties.

Cupro Nickels

The 90/10 and 70/30 alloys are widely used in sea water applications and are comparable to the aluminium bronzes for corrosion resistance. They also have high ductility which allows them to be cold formed into components.

Dezincification Resistant Alloys
A range of alloys which can be used in the water supply or water treatment industry where corrosive attack on the more common free machining brasses can be a problem. The alloys are designed to minimise the leaching of copper, zinc and lead into the water supply.