Question

Consider that the following materials are usable for manufacturing dies, moulds in the investment casting process for large-scale production:

1. Aluminium alloy

2. Magnesium alloy

3. Brass

4. Low-carbon steel

Which of the above are correctly usable?
1. 1, 2 and 3 only
2. 1, 2 and 4 only
3. 3 and 4 only
4. 1, 2, 3 and 4

Answer 1

Correct Answer - Option 1 : 1, 2 and 3 only

Concept:

• The materials used for manufacturing dies, moulds in the investment casting process for large-scale production require high hardness.
• Low-carbon steel does not have enough hardness.
• Thus it cannot be used for the investment casting process as moulds.
• Aluminium alloy, magnesium alloys, brass are used for manufacturing dies, moulds in investment casting as dies requires high hardness and also like high carbon steels due to high hardness.