Abrasive 3 (english) A substance capable of grinding away another material.
Abrasive Wear (english) The displacement and / or detachment of metallic particles from a surface as a consequence of being exposed to flowing fluids or gases.
Abrasive Wheels (english) Wheels of a hard abrasive, such as Carborundum used for grinding.
ABSOLUTE PRESSURE (english) The indicated value of the weight of the earth's atmosphere. At sea level, this value is approximately 14.65 psi (pounds per square inch).
Ac1 (english) The temperature at which austenite begins to form on heating.
Ac3 (english) In hypoeutectoid steel, the temperature at which transformation of ferrite into austenite is completed upon heating.
Accm (english) In hypereutectoid steel, the temperature at which cementite goes into complete solution with austenite.
Accordion Reed Steel (english) Hardened, tempered, polished and blued or yellow flat steel with dressed edges. Carbon content about 1.00. Material has to possess good flatness, uniform hardness and high elasticity.
ACCUMULATOR (english) A vessel, normally cylindrical, which is used to store fluid and gas for future release of the energy in the compressed fluid and gas. Normally contains a diaphragm or piston between the fluid (liquid) and gas chambers. Fluid is normally introduced at one end and the gas at the opposite end.
Accurate (english) Conforms to a standard or tolerance.
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