A cylindrical tank  with an inner diameter of 2.5 m and a wall thickness of 32 mm is made of a steel alloy and subjected to an internal pressure of 2.3 MPa. a) Determine the maximum hoop stress  (in MPa).   b) If the steel alloy has a yield stress of 350 MPa, what is the maximum allowable pressure if a factor of safety of 2.5 with respect to yield is required (in MPa).   c) Determine the maximum longitudinal stress (in MPa).   d) A pressure vessel is described as thin-walled when the ratio of the inside radius to the wall thickness is greater than or equal ________?

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Alloys

An alloy is an admixture of two or more metals or a metal and a non-metal. Since ancient times, man has been using alloys. Alloying helps to retain the properties of the parent matter, such as hardness, strength, toughness, ductility and is corrosion-resistant. Copper alloys such as brass have antimicrobial properties that help to fight against (Coronavirus disease 2019) COVID-19 and other hospital-acquired infections. Some common alloys are brass, bronze, solder steel, etc. Most alloys have a lower melting point than their constituents. This is due to the presence of a nonmetal as one of the constituents that behaves as an impurity and restricts the raise of melting point.