Materials and Construction
Silico-manganese steels (containing 0.7% Mn, 0.5% C and 2% Si)

Do not require heat treatment for any of its applications
Are used for leaf and coiled springs
Is tempered at 850°C
Do not have good resilience properties

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Materials and Construction
Cast iron is

Manufactured in cupola and is brittle
All of these
Used for making shock resisting parts
Having compressive strength more than its tensile strength

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