Exploring the Innovative Characteristics of C21 Steel Grade

C21 steel grade refers to a low-carbon steel that is typically used for construction and engineering purposes. It is known for its excellent weldability and is often used in the manufacturing of structural components, such as beams and columns.

1. Mechanical Properties:
– Tensile Strength: C21 steel has a minimum tensile strength of 520 MPa, which ensures its ability to withstand high levels of stress and pressure without deformation.
– Yield Strength: The yield strength of C21 steel is 370 MPa, indicating its ability to resist deformation or breakage under load.
– Elongation: C21 steel has a minimum elongation of 20%, which means it can stretch without fracturing or losing its structural integrity.
– Hardness: The hardness of C21 steel is typically around 150 Brinell. This provides moderate resistance to wear and abrasion.

2. Chemical Composition:
– Carbon (C): The carbon content in C21 steel is between 0.18% and 0.24%. This low carbon content allows for good weldability and reduces the risk of brittleness in the steel.
– Manganese (Mn): The manganese content in C21 steel is typically between 1.00% and 1.50%. Manganese enhances the steel’s strength and improves its hardenability.
– Phosphorus (P): The maximum phosphorus content in C21 steel is 0.040%. Phosphorus can have detrimental effects on the steel’s mechanical properties, so its presence is limited.
– Sulfur (S): The maximum sulfur content in C21 steel is 0.050%. Like phosphorus, sulfur can negatively affect the steel’s properties. Therefore, its content is also restricted.
– Silicon (Si): The silicon content in C21 steel is typically between 0.15% and 0.35%. Silicon improves the steel’s strength, hardness, and resistance to corrosion.
– Copper (Cu): The maximum copper content in C21 steel is 0.35%. Copper improves the steel’s atmospheric corrosion resistance and enhances its electrical conductivity.
– Iron (Fe): Iron is the primary element in C21 steel, typically constituting over 97% of its composition.
C21 Steel grade
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