Material Selection

Question 1

What 3 things are equally considered when designing a product?

Answer 1

Properties
Availability
Cost

Question 2

What are examples of mechanical properties?

Answer 2

Yield/ultimate strength
Fatigue
Hardness
Toughness
Ductility

Question 3

What are examples of physical properties?

Answer 3

Density
Electrical & thermal properties
Magnetism
Melting point
Thermal expansion

Question 4

What are examples of chemical properties?

Answer 4

Corrosion & oxidation resistance
Toxicity
Radiation resistance

Question 5

What are examples of dimensional properties?

Answer 5

Dimensional stability
Surface finish

Question 6

What are examples of inexpensive and expensive metals?

Answer 6

Inexpensive: cast irons, carbon steels, aluminium
Expensive: Titanium, silver, gold

Question 7

What are factors to consider in availability?

Answer 7

Is material in desired form?
Can it be obtained?
Is material from multiple suppliers?

Question 8

What are some cost factors?

Answer 8

What is production volume (one of a kind or high volume)?
What is anticipated service life?
Manufacturability

Question 9

What factors can affect manufacturability?

Answer 9

Size & weight
Is heat treatment or rolling needed?
Weldability