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

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

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Materials and Construction
Lead is

Used as a shock absorber (in mattress form) between the foundation an steel framework of skyscrapper buildings
Used as a cathodic material
Not used as pigment (in its compound forms) for paints
Not resistant to corrosion

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