Question

What is the chemical composition of steel? What is the effect of carbon on the mechanical properties of steel? What is the typical maximum percent of carbon in steel used for structures?

Answer 1

Answer:

STEEL Is the Major Material used in construction Industry due to its Strength,Durability and Life span and also Economical.

Chemical Composition of Steel

Steel Generally consists of Iron and Carbon (Primary alloy of steel though in less percentage)

It also consisits other alloys like Manganese,Chromium,Nickel and Tungsten,Phosporous.

• Phosporous- Increases steel embrittlement and decreases ductility
• Nickel - Increases corrosion resistence
• Chromium -Protects against Oxidation
• Manganese -Increases toughness
• Iron - Iron ore

Effect of Carbon on Mechanical Properities

Increase in Carbon content causes

• Increase in Overall Strength
• Increase in Tensile Strength
• Increase in Hard ness
• Decrease in Ductility

Low Carbon Steel -- Known as MILD STEEL

High Carbon steel -- Known as HYSD Bars (High Yeild Strength Deformed Bars)

Maximun Percent of steel used in construction is 1.50%

Low Carbon Steel - up to 0.25%

Medium Carbon Steel - 0.25 to 0.45%

High Carbon Steel - 0.45 to 1.5%