A Closer Look at the Composition and Properties of 45 Steel Grade

45 steel grade is a medium carbon steel with a carbon content of 0.45%. It is commonly used in the production of parts and components that require high strength and good toughness, such as gears, shafts, axles, bolts, and studs.

The chemical composition of 45 steel grade typically includes:
– Carbon (C) 0.42-0.50%
– Silicon (Si) 0.17-0.37%
– Manganese (Mn) 0.50-0.80%
– Phosphorus (P) max 0.035%
– Sulfur (S) max 0.035%

The mechanical properties of 45 steel grade are as follows:
– Tensile strength: 600-800 MPa
– Yield strength: 355 MPa
– Elongation: 16-20%
– Hardness: 187-229 HB

These properties make 45 steel grade suitable for applications that require high strength, good toughness, and wear resistance. It can be easily machined and welded, and is often used in the production of machinery parts and components.
45 Steel grade
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