Duraluminium

January 27th, 2012 11:47 PM | Mechanical Engineering | No Comment
Duraluminium. It is a very important alloy of aluminium. Its composition is as given below : Copper                      ...3.5 to 4.5% Manganese                ...0.4 to 0.7% Magnesium               ...0.4 to 0.7% Iron or Silicon          ...Not more than 0.7% Aluminium                ...Rest. The alloy has got high machinability. It can be ...

Lead Alloys

January 27th, 2012 11:46 PM | Mechanical Engineering | No Comment
1. Antimonial-Lead. Its composition varies from 6% to 8% of antimony with balance lead. Antimonial lead is highly resis­tant to sulphuric acid and many chemical solutions containing sul­phuric acid. The hardness and strength of antimonial lead is more than that ...

Bronzes – Copper-Tin Alloys

January 27th, 2012 09:26 PM | Mechanical Engineering | No Comment
Tin content varies from 2 to 12% but generally bronzes having 5% tin and 10% tin are commonly used. Bronzes contain­ing 5% tin are used in wrought form and those containing 10% tin are used in the cast condition. Addition ...

Alloys

January 27th, 2012 08:47 PM | Mechanical Engineering | No Comment
Alloy is a mixture with metallic properties and is composed of two or more elements, of which at least one is a metal. In the course of development of metallography it has been found that some alloys are definite compounds, some ...

Nickel

January 27th, 2012 08:35 PM | Mechanical Engineering | No Comment
Uses of Nickel (i) It is used for manufacturing chromium-nickel, stainless steels and nickel-chromium-molybdenum steels. (ii) For electroplating on base metals. (iii) For minting coins. Properties of Nickel. Nickel is a hard lustrous, white metal. It fuses at 1484°C. It can take up high ...

Aluminium

January 26th, 2012 08:16 AM | Mechanical Engineering | No Comment
First stage in the production of aluminium is the production of alumina by chemical refinement of bauxite. Aluminium is then produced by the electrolysis of alumina dissolved in a bath of molten cryolite. It is available in the market as ...

Molybdenum

January 26th, 2012 08:10 AM | Mechanical Engineering | No Comment
Uses of Molybdenum in Industry 1.  Lubrication. Molybdenum disulphide dispersed in greases and oils is used for industrial and automotive lubrication. Molyb­denum disulphide in volatile carriers forms dry coating which acts as lubricating agent. 2.   Corrosion Inhibitor. Sodium molybdate acts as corrosion ...
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