Excellent Fracture Toughness Performance 45crnimova Steel Factory Order - China

45CrNiMoVA steel is a high-strength, high-toughness alloy structural steel, commonly used in the manufacture of aerospace and weapon structural parts that withstand high stress and impact loads.

Its fracture toughness (Fracture Toughness, K\_IC) is very excellent, which is one of the important performance advantages of this steel.

Typical value of fracture toughness (K\_IC):

For 45CrNiMoVA steel after optimized heat treatment (such as quenching and tempering), its fracture toughness can reach:

K\_IC ≈ 80\~130 MPa·m^0.5 (depending on the specific heat treatment state and microstructure)

> For example: after quenching + tempering treatment to a strength level of about 1800 MPa, its K\_IC can be maintained at 90\~110 MPa·m^0.5 - Factors affecting fracture toughness:

1 - Heat treatment state: Reasonable quenching + tempering can obtain tempered troostite or bainite structure, significantly improving toughness.

2 - Control of impurities and non-metallic inclusions: The lower the content of oxygen, sulfur, phosphorus and other elements in steel, the higher the fracture toughness.

3 - Grain size: Small and uniform grains help to improve K\_IC.

Typical application scenarios of 45CrNiMoVA require fracture toughness:

Aerospace landing gear, engine hanger

Rocket structural connectors

High-strength bolts, couplings

Core components of aircraft carrier-based devices In these applications, the material is required not only to have extremely high strength, but also to have excellent fracture toughness to prevent catastrophic failure due to microcrack expansion.

Songshun specialized in Special Steel for almost 20 years.

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• Posted By: Dongguan Songshun Mould Steel Co., Ltd.

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• Business Description: Established in 2009,Songshun Steel supplies a wide range of carbon, alloy and tool steel products, including high speed tool steel, cold work tool steel, hot work tool steel, plastic mould steel, engineering steel and machine structural steel etc.
  
  After more than 10 years development and growing, Songshun Steel becomes one comprehensive special steel factory, stockist and exporter.
  
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  Due to satisfactory reliable quality and professional service, Songshun expands our market worldwide, such as Colombia, Chile, Spain, Turkey, Iran, Vietnam, Malaysia ,UAE, Canada, Brazil, Mexico and so on.
  
  Songshun specialized in Special Steel for almost 20 years.
  
  We can supply mold steel, high speed steel, alloy steel, free cutting steel and etc.
  
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