20MnCr5 Steel: Round and Flat Available

20MnCr5 is a low-alloy case hardening steel that has become popular in various engineering fields due to its outstanding mechanical properties and wear resistance. With a well-balanced chemical composition, this steel grade is especially suitable for components that demand high strength and durability, such as gears, shafts, and other critical parts in the automotive and machinery sectors. This article examines the chemical composition, material properties, and applications of 20MnCr5, while also comparing it to its counterpart, 16MnCr5, to emphasize the differences in performance and suitability for specific uses. Furthermore, we will look into the characteristics of 20MnCr5 round bars, which are vital for producing reliable and high-performance components.

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Chemical Composition of 20MnCr5

• Carbon (C): 0.17 – 0.22%

• Silicon (Si): ≤ 0.25%

• Manganese (Mn): 1.10 – 1.50%

• Sulfur (S): 0.010 – 0.035%

• Phosphorus (P): ≤ 0.035%

• Chromium (Cr): 1.00 – 1.30%

  
  

Material Properties

• Tensile Strength: Ranges from 1000 to 1300 N/mm², with a maximum of 1482 MPa after heat treatment.

• Hardness: Approximately 200 HB in the normalized state, increasing to about 357 HB after hardening.

• Hardenability: Excellent, allowing for high surface hardness and wear resistance through carburizing and heat treatment.

• Toughness: Maintains good toughness in the core, making it suitable for high-stress applications.

  
  

Difference Between 16MnCr5 and 20MnCr5

Chemical Composition:

16MnCr5: Carbon content of 0.14 – 0.19%, Manganese 1.00 – 1.30%, Chromium 0.80 – 1.10%.

20MnCr5: Higher carbon, manganese, and chromium content, leading to enhanced properties.

Mechanical Properties:

16MnCr5: Tensile strength of 880 – 1180 MPa, hardness up to 297 HB.

20MnCr5: Higher tensile strength and hardness, making it more suitable for heavy-loaded applications.

Applications:

16MnCr5: Commonly used for gears, bearings, and parts requiring good toughness.

20MnCr5: Preferred for high-strength components like gears, shafts, and spindles in demanding environments.

Hardness of 20MnCr5

• Normalized State: Approximately 200 HB.

• After Heat Treatment: Can achieve hardness levels of around 357 HB, making it suitable for applications requiring high wear resistance.

20mncr5 round bars

Applications: Widely used in the automotive and machinery industries for components that experience high stress and fatigue.

Properties: Provide the necessary strength and wear resistance, making them ideal for manufacturing gears, shafts, and other critical parts.

Production: Typically produced through processes that ensure uniformity and high quality, suitable for various engineering applications.

20mncr5 Round bars

RN Gupta and Bros is proud to supply high-quality 20MnCr5 round and flat bars throughout India, gaining the trust of more than 500 respected companies. Discover our dedication to excellence and reliability—request your quote today and start a successful partnership with us!

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