ALFOL – Technical name for thin corrugated aluminium foil in narrow strips, used for heat insulation, for which it is effective by reason of the numerous small air cells formed when packed.
ALIGN – To bring two or more components of a unit into correct positions with respect to one another.
ALL WEATHER TYRE – A tyre designed to provide good traction on dry, wet and dirt and snow covered roadways.
ALLAN VALVE – A steam engine slide valve, in which a supplementary passage increases the steam supply to the port during admission to reduce wire drawing.
ALLOTROPIC METALS – Metals which exist in one lattice form over a range of temperature, but at a certain temperature the lattice form changes to another type which is stable over another temperature range.
ALLOTROPY – Ability of a material to exist in several crystalline forms.
ALLOWANCE – The intentional or desired difference between the maximum limits of mating parts to provide a certain class of fit.
ALLOY STEEL – Steel containing significant quantities of alloying elements (other than carbon and the commonly accepted amounts of manganese, silicon, sulphur and phosphorus) added to effect changes in mechanical and physical properties.
ALLOY – A substance having metallic properties and is composed of two or more chemical elements, of which at least one is a metal.
ALLOYING ELEMENTS – Elements either metallic or non-metallic added intentionally to the base metal, to make a marked change in the properties of the base metal and to secure certain desirable properties.
ALLOYING OF METAL – The addition of varying proportions of other elements to a basic metal in order to produce an alloy having specific properties.
ALNICOS – Alnicos materials are composed mainly of aluminium, nickel, cobalt and iron. Some include additions of copper and titanium. They are high-coercive force, high magnetic energy alloys.
ALOXITE – Artificial abrasive material used in the manufacture of grinding wheels. Essentially it consists of alumina, or aluminium oxide, the chemical symbol for which is Al2O3·
ALPHA IRON – The body centered cubic form of pure iron, stable below 1025°C.
ALIGN – To bring two or more components of a unit into correct positions with respect to one another.
ALL WEATHER TYRE – A tyre designed to provide good traction on dry, wet and dirt and snow covered roadways.
ALLAN VALVE – A steam engine slide valve, in which a supplementary passage increases the steam supply to the port during admission to reduce wire drawing.
ALLOTROPIC METALS – Metals which exist in one lattice form over a range of temperature, but at a certain temperature the lattice form changes to another type which is stable over another temperature range.
ALLOTROPY – Ability of a material to exist in several crystalline forms.
ALLOWANCE – The intentional or desired difference between the maximum limits of mating parts to provide a certain class of fit.
ALLOY STEEL – Steel containing significant quantities of alloying elements (other than carbon and the commonly accepted amounts of manganese, silicon, sulphur and phosphorus) added to effect changes in mechanical and physical properties.
ALLOY – A substance having metallic properties and is composed of two or more chemical elements, of which at least one is a metal.
ALLOYING ELEMENTS – Elements either metallic or non-metallic added intentionally to the base metal, to make a marked change in the properties of the base metal and to secure certain desirable properties.
ALLOYING OF METAL – The addition of varying proportions of other elements to a basic metal in order to produce an alloy having specific properties.
ALNICOS – Alnicos materials are composed mainly of aluminium, nickel, cobalt and iron. Some include additions of copper and titanium. They are high-coercive force, high magnetic energy alloys.
ALOXITE – Artificial abrasive material used in the manufacture of grinding wheels. Essentially it consists of alumina, or aluminium oxide, the chemical symbol for which is Al2O3·
ALPHA IRON – The body centered cubic form of pure iron, stable below 1025°C.
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