STEEL EXAM PART 1

Iron-Carbon Alloys

• Iron-carbon alloys with higher carbon content are less malleable and harder than mild steel.
• Alloy with iron and carbon as primary elements.
• Steel is a type of iron-carbon alloy that includes manganese as a major chemical ingredient.

Types of Steel

• Mild steel contains carbon as the alloy.
• Another type of steel includes chromium as an alloying element.

Weathering Steel

• A type of structural steel with improved atmospheric corrosion resistance.
• Extensively used for bridges and building exteriors.

Mechanical Properties of Weathering Steel

• Plates, bars, and shapes with a thickness of less than 8 in (203 mm) have a minimum yield strength of 36,000 psi (250 MPa) and ultimate tensile strength of 58,000–80,000 psi (400–550 MPa).
• Plates thicker than 8 in have a 32,000 psi (220 MPa) yield strength and the same ultimate tensile strength of 58,000–80,000 psi (400–550 MPa).

Advantages of Steel as a Structural Material

• 1. High strength-to-weight ratio, making it a efficient building material.
• 2. Durable and can withstand harsh environmental conditions.
• 3. Can be fabricated into various shapes and forms.
• 4. Can be coated with protective layers to prevent corrosion.
• 5. Relatively low cost compared to other structural materials.