Understanding the Composition and Mechanical Properties of GGG 40.3 Steel Grade

GGG 40.3 is a type of nodular cast iron (also known as ductile iron) that is commonly used in various industrial applications due to its excellent mechanical properties. To understand its composition and mechanical properties, let’s look at each aspect in detail:

1. Chemical Composition:
The chemical composition of GGG 40.3 steel grade typically consists of the following elements:
– Carbon (C): 3.4% to 3.7%
– Silicon (Si): 2.0% to 2.8%
– Manganese (Mn): 0.2% to 0.5%
– Sulphur (S): less than 0.02%
– Phosphorus (P): less than 0.1%
– Copper (Cu): less than 0.25%

2. Mechanical Properties:
GGG 40.3 steel grade possesses excellent mechanical properties, making it suitable for various applications. The typical mechanical properties of GGG 40.3 are as follows:
– Tensile Strength: 400 MPa to 600 MPa
– Yield Strength: 250 MPa to 400 MPa
– Elongation: 10% to 20%
– Hardness: 190 to 270 HB
– Impact Strength: 7.0 J/cm² to 10.0 J/cm²
– Modulus of Elasticity: 160 GPa to 170 GPa

These mechanical properties make GGG 40.3 steel grade highly resistant to wear, fatigue, and impact, while also providing good ductility and machinability.

In conclusion, GGG 40.3 steel grade is a type of nodular cast iron with a chemical composition that includes carbon, silicon, manganese, sulphur, phosphorus, and copper. This steel grade exhibits excellent mechanical properties, such as high tensile and yield strength, good elongation, hardness, impact strength, and modulus of elasticity. These properties contribute to its widespread use in industrial applications where strength and durability are crucial.
GGG 40.3 Steel grade
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