Engineering Mock

Hardness- The ability to resist wear, scratches and dents

Durability- The ability to withstand wear, scratching and weathering

Toughness- The ability to withstand hits or sudden shocks without breaking

Brittleness- The ability to break without to much force or stress

Malleability- The ability to permanently deform in all directions without breaking

Elastcity- The ability to bend and return back to the original shape

Ductility- The ability to be stretched into wires without breaking

Strength- The ability to withstand a force without breaking or bending

Thermal Conductivity- The degree to which a specific material conducts heat

Electrical Conductivity- The degree to which a specific material conducts electricity

Fusibility- The quality of objects being fusible or convertible especially to heat

Viscosity- The state of being semi-fluid but also thick in consistency

Boiling Point- The temperature at which a liquid boils and turns to a gas

Density- The degree of compactness of the particles in a substance

Aesthetics- How a product or material looks to another person

Ferrous Metals- A ferrous metal is a metal that contains iron and/or steel

Non- Ferrous Metals- a non- ferrous metal is a metal that doesn't contain iron and/or steel

Alloy metals- An alloy is a mixture of two elements, at least one of those must be a metal

Examples of ferrous metals:

• Stainless Steel
• Mild Steel
• Cast- Iron
• High Carbon Steel
• Medium Carbon Steel

Examples of non- ferrous metals:

• Aluminium
• Copper
• Lead
• Gold
• Silver

Examples of alloy metals:

• Brass
• Steel
• Bronze

Differences:

• Stainless steel is more expensive
• Stainless steel is less likely to rust in a kitchen/house environment

Similarities:

• Both metals are ferrous metals
• Both metals can be formed into different shapes with ease

Ease Of Manufacture:

• Stainless steel is harder to use in a machine
• Stainless steel is harder to manufacture

• Ingots (for melting to cast products)
• Flat plates, sheets and strips
• Bars and rods
• Tubes and pipes
• Standard section form
• Wires

• Polymers are very large molecules made when many smaller molecules join together, end-to-end. The smaller molecules are called monomers.
• A lot of everyday items are made from polymers. Many of these polymers are not biodegradable as microbes cannot digest them and they take a long time to break down. Because of this, polymers are usually disposed by burying them in landfill sites. These methods of disposal cause environmental problems, and waste valuable resources.

Composite materials are made from two or more different types of material. The materials for a composite material are chosen because they have different properties that combine to make a more useful material.

For example: Steel-reinforced concrete is a composite material. It is made by pouring concrete around a mesh of steel cables. When the concrete sets, the material is:strong when stretched (because of the steel) and also strong when squashed (because of the concrete).

• Carbon- fibre- reinforced polymer (CRP)
• Reinforcerd concrete
• Glass- reinforced plastic (GRP)
• Plywood
• Medium density fibreboard (MDF)
• Oriented strand board (OSB)
• Structural concrete

Timber is a type of wood from trees. Timber may be used to make frames for wooden buildings or gliders.

Timber used for structural applications is typically softwood. Timber is usually sawn into standard sizes and shapes. rougher sawn timber may be planed to give a smoother surface. Planed timber is often more expensive however is usually more accurately sized for the use.

Ceramic materials are typically oxides, nitrates or cabides of metals. They are usually harder than most other materials, meaning that they are very resistant to wear and scrathes. Because of this, they are used for tools. They also have a resistance to corrosion and are therefore used for chemical containers in labs.

Ceramics are also good insulatiors for both electricity and heat and they can also withstand high temperatures without softening. They generally have a good strength in compression. However they have a low tensile strength, very low ductility and are quite brittle materials. When they are exposed to pulling forces, they tend to crack and break apart.

Due to their hardness, ceramics are very difficult to machine. They are often made by moulding processes where very fine particles are either compressed together or held together by liquids, like in clay.