Composition of the steel and the percentage composition of steel

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Identify the composition of steel and explain how the percentage composition of steel can determine its properties[/cs_text][/cs_column][/cs_row][/cs_section][cs_section parallax=”false” separator_top_type=”none” separator_top_height=”50px” separator_top_angle_point=”50″ separator_bottom_type=”none” separator_bottom_height=”50px” separator_bottom_angle_point=”50″ style=”margin: 0px;padding: 45px 0px;”][cs_row inner_container=”true” marginless_columns=”false” style=”margin: 0px auto;padding: 0px;”][cs_column fade=”false” fade_animation=”in” fade_animation_offset=”45px” fade_duration=”750″ type=”1/1″ style=”padding: 0px;”][cs_text]

  • There are an unlimited number of steel compositions, with each one having different properties.
  • The three most commonly used steels are mild steel, structural steel and stainless steel:

 

Steel:    Composition: Properties: Uses:
Mild
  • <0.2% C
  • Soft and malleable.
  • Corrodes fairly rapidly.
  • Pipes.
  • Nuts and bolts.
  • Roofing.
  • Shipbuilding.
Structural
  • 0.3-0.6% C
  • Hard and malleable.
  • High tensile strength.
  • Corrodes fairly rapidly.
  • Beams and Girders.
  • Railways.
  • Reinforcing for buildings.
Stainless
  • 10-20% Cr
  • 5-10% Ni
  • Hard.
  • Takes a high polish.
  • Very resistant to corrosion.
  • Food processing machinery.
  • Kitchen sinks and appliances.
  • Cutlery.
  • Surgical instruments.
  • Razor blades.

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