The bronzes-copper alloys, Mechanical Engineering

The Bronzes

The coinage bronze employed for making coins in earlier days contains 95% copper, 4% Sn and 1 % Zn. The Zn acts as a deoxidizer. Such alloy is soft and ductile.

Admiralty gun metal comprises 88% Cu, 10% Sn and 2% Zinc. This bronze is usually cast to generate steam and water fittings and bearings. The addition of Pb enhances the alloy's pressure tightness.

Phosphor bronzes are usually utilized in manufacture of bearings, bronze springs and hard drawn wires. In addition to tin they have minute percentage of phosphorous like alloying element. 0.2% P forms Cu3P that is a hard compound. This acts as deoxidizer and enhances fluidity.

Copper aluminium alloys posse high strength along with good resistance to fatigue, abrasion and corrosion and are golden in colour. Aluminium can dissolve in copper to the level of 9% and greater content than these encourage brittleness. Wrought alloys that are good for hot and cold working applications contain 5 to 7 percent Al. Casting alloys contain 10 percent Al. Minute percentage of Fe, Nickel and Mn are added to casting alloys to create them more simply heat treatable. Aluminium bronze is well identified for its colour and often termed as Imitation gold. Al bronze compares well along with the strength of steel.

Bronzes in common are identified for the following characteristics as:

  • costlier than brass,
  • better corrosion resistance,
  • stronger than brass, and
  • Bearing material.
Posted Date: 2/27/2013 1:18:29 AM | Location : United States







Related Discussions:- The bronzes-copper alloys, Assignment Help, Ask Question on The bronzes-copper alloys, Get Answer, Expert's Help, The bronzes-copper alloys Discussions

Write discussion on The bronzes-copper alloys
Your posts are moderated
Related Questions
Characteristics  Of  Computer  Controlled Scheduling (Ccs) To control the manufacturing system in an effectual way, the system is normally composed in a task-based hierarchy. T

Sales incentives , introduction of new models as well as variants coupled with easy availability of low cost finance with comfortable repayment options continues to drive demand an

a) Determine the relative error if 2/3 is approximate to 0.667. b) √29 = 5.385 and √Π= 3.317 Correct to 4 significant figures. Determine the relative errors in their sum and dif

Kinematics: This is that branch of Theory of Machines that deals with the relative motion among the several machine parts; without referring forces or torques that cause motion.

Explain action and reaction of force: Two bodies A and B are in contact at point ' O '. Body A Press against body B. Thus action of body A on the body B is F . React

Explain Hard or Fixed Automation Mechanical controls consist of numbers of mechanism that create the required relative motion to complete an activity. These mechanisms include:

Draw TS and pv diagrams of a dual cycle. Why this cycle is also named limited pressure or mixed cycle ? Derive the mathematical expressions for the efficiency and mean effective pr

what is the difference between point function and path function?


Maximum Bending Moment: The SF changes sign at A, among A and B and at B. Let a section XX at a distance x from the end C as illustrated in Figure SF at section XX, F x