Inside 42Cr4 Steel Grade: Understanding its Composition, Hardness, and Durability

Specification Inside 42Cr4 Steel Grade: Understanding its Composition, Hardness, and Durability:

42Cr4 is a low carbon alloy steel grade primarily used for manufacturing various machine components. It falls under the European standard EN 10083-1. Here is a breakdown of its specifications and properties:

Chemical Composition:
– Carbon (C): 0.39-0.45%
– Silicon (Si): 0.15-0.40%
– Manganese (Mn): 0.50-0.80%
– Phosphorus (P): maximum 0.035%
– Sulfur (S): maximum 0.035%
– Chromium (Cr): 0.80-1.10%

Mechanical Properties:
– Tensile Strength: 650-850 MPa (Mega Pascals)
– Yield Strength: 380-540 MPa
– Elongation: 14-22%
– Hardness: 22-30 HRC (Rockwell hardness)
– Impact energy: minimum 58 J (Joules)

Hardness:
42Cr4 steel grade has a relatively high hardness. After heat treatment, it typically achieves a hardness between 22 and 30 HRC. This hardness level ensures the steel’s strength and resistance to wear and deformation.

Durability:
Due to its chemical composition and heat treatment capabilities, 42Cr4 steel grade exhibits good durability. Its combination of hardness and strength makes it suitable for various applications that involve heavy loads, high stress, and mechanical wear.

Applications:
This steel grade is commonly used in the production of gears, shafts, pins, and other machine components that require high strength and durability. It is often utilized in automotive and machinery industries where resistance to wear and fatigue is crucial.

Overall, 42Cr4 steel grade offers a balance between hardness, strength, and toughness, making it a reliable choice for demanding industrial applications. Its composition, mechanical properties, and durability characteristics contribute to its suitability for various manufacturing purposes.
42Cr4 Steel grade
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