Correct option is B
Carbon Steel Classification:
Carbon steels are categorized based on their carbon content, which significantly influences their mechanical properties and applications. The primary classifications are:
1.
Low Carbon Steel (Mild Steel):
·
Carbon Content: Approximately
0.05% to 0.25%
·
Properties:
· High ductility and malleability
· Easily welded and formed
· Lower strength compared to higher carbon steels
·
Applications: Structural shapes, automotive body panels, pipelines.
2.
Medium Carbon Steel:
·
Carbon Content: Approximately
0.25% to 0.60%
·
Properties:
· Balanced combination of strength and ductility
· Higher strength and hardness than low carbon steels
· Can be heat-treated to improve mechanical properties
·
Applications: Machinery parts, automotive components, structural applications requiring higher strength, springs.
3.
High Carbon Steel:
·
Carbon Content: Approximately
0.60% to 1.0%
·
Properties:
· High strength and hardness
· Lower ductility and toughness
· More challenging to weld
·
Applications: Cutting tools, springs, high-strength wires.
4.
Ultra-High Carbon Steel:
·
Carbon Content: Greater than
1.0%
·
Properties:
· Extremely high hardness and strength
· Very brittle
· Limited applications due to brittleness
·
Applications: Specialized tools, knives, and other high-wear components.
·
