I. Material Overview

A36 is a low-carbon structural steel specified in the American ASTM A36 standard, widely used in construction, mechanical manufacturing, and metal processing due to its excellent comprehensive mechanical properties and cost-effectiveness. Its typical characteristics include:

 

Carbon Content: ≤0.25%, classified as low-carbon steel, balancing good plasticity and weldability.

Microstructure: Ferrite + pearlite, ensuring a balance between strength and workability.

II. Chemical Composition (Typical Values, Referencing ASTM A36)

Element	Content (%)	Role
Carbon (C)	≤0.25	Primary strengthening element; low content ensures good plasticity and weldability.
Manganese (Mn)	0.80-1.65	Enhances strength and hardness, improves workability.
Phosphorus (P)	≤0.04	Improves corrosion resistance, but excessive content causes cold brittleness.
Sulfur (S)	≤0.05	Maintained at a low level to reduce the risk of hot brittleness.
Silicon (Si)	≤0.40	Deoxidizer, increases the strength and hardness of steel.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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