Question

what are the mechanical and physical properties for steel, beryllium and plastic in terms of working in hard environment hot/cold ,waterproof and fitness sizes ?

Answer 1

Answer-

Mechanical and Physical properties:

Mechanical properties- Mechanical properties are basically metal performance when different forces are applied to it.

Example: hardness of the material, tensile strength, modulus of elasticity and elongation.

Physical properties- These are the measurable properties without changing the composition of materials.

Example: melting point, density, conductivity and boiling point, mass, etc.

Mechanical and Physical Properties of Steel:

• Steam and chemical plant operates at 450-550degreeC
• Gas turbine pipes work at the higher temperatures.
• Yield-strength of steel at 600 degreeC is higher than ambient temperature by 2/3.
• Steel remains undamaged till a pressure of 165 ft depth, can be used for dishwashing and swimming.
• The aging of material can harm the steel's waterproofness.

Mechanical and Physical Properties of Beryllium(Be):

• It's a hard, brittle metal that has a melting point around 1560 K.
• Also, have a high modulus of elasticity that is 50% greater than steel.
• Beryllium is relatively soft and has a low density.
• It is a very light and very stiff.
• Be is transparent to x-rays.
• Be reacts with acids and with water to form hydrogen gas.

Mechanical and Physical Properties of Plastic:

• Plastic can withstand up to 100degreeC, but polyethylene terephthalate(PET) has a melting point 255degreeC.
• Mostly, plastics contain carbon content that burns and gives smoke when comes in contact with flame.
• Plastic is waterproof because of its structure that structure provides water repellant property(contains polymeric chains).
• Thermoplastic has a larger coefficient of thermal expansion.