Disadvantages And Disadvantages Of Ferrous Metals

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Ferrous Metals
Mostly consists of Iron. Small amounts of other metals or elements are added to give the needed properties. Ferrous Metals are magnetic and have little resistance to corrosion.
Advantages
• High strength to weight ratio with regard to Non-metals
• Weighs more than Aluminum and Titanium Alloys
• High quality and durable material
• Recyclable and environmentally friendly
Disadvantages
• Tends to corrode by rusting
• Machine ability is affected by the magnetic field
• Requires more energy to form shapes or re-work compared to Aluminum Alloys
Examples and uses:
• Mild Steel – Used for engineering purposes and in general, none specialized metal products.
• Carbon steel – Used to make cutting tools such as drill bits.
• Stainless
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Thermoplastics:
Organic materials that melt when heated. They are formed when they are in a melted or viscous phase. This generally means they are heated, formed, and then cooled in their final shape.
Advantages: Thermoplastics have a good range of properties and are energy efficient both in their manufacture and processing. Thermoplastic components can be made in very high volume with high precision and low cost. Thermoplastics can replace metals with a considerable weight savings, providing proper care is taken in design. Most thermoplastics have better fatigue properties than metals and will tolerate larger deflections than metals without deforming.
Disadvantages: Thermoplastics melt. Some degrade in direct sunlight or under high U.V. light levels. Many materials have poor resistance to hydrocarbons, organic solvents, and highly polar solvents but others have excellent resistance to these materials. Thermoplastics suffer from creep, a relaxation of the material under long term loading. Many thermoplastic materials, especially composites, tend to fracture rather than deform under high stress
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Furthermore, polyester is in vast industrial use, in conveyor belts, in fibers, in ropes, in yarns, as well as in tire reinforcements.
• Polypropylene is also known as polypropene. It is used in packaging and labelling, in textiles such as carpets and thermal underwear, stationery, laboratory equipment, loudspeakers, polymer banknotes. It is resistant to a lot of chemical solvents, acids and bases.
• Polystyrene can be a thermoplastic or a thermoset. As a thermoplastic it is used for disposable cutlery, CD and DVD cases, plastic models, smoke detector housings, packaging materials, insulation, and foam cups.
• Cellulose acetate is used in photography, in adhesives, for eyeglasses frames, and also as a synthetic fiber. Cigarette filters and playing cards are also made of it.
• Teflon is mostly known as the non-stick coating of cookware. It is also used as a lubricant to reduce friction and wear, as well as energy consumption in machinery.
• Nylon is a silk plastic, used to make fabrics, carpets, ropes, musical strings, and bridal veils.
• Polyketones are high performance thermoplastics which resist solvents, like polypropylene; these thermoplastics have good mechanical

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