26SiMnMo, as a high-strength and tough steel, exhibits excellent toughness performance. Especially after proper quenching and tempering heat treatment (quenching + tempering), it can achieve a good balance between high strength and high toughness, meeting the working condition requirements of various scenarios that bear impact and dynamic loads. The specific toughness characteristics are as follows:

1. Impact Toughness Index

At room temperature, after standard quenching and tempering treatment (quenching temperature 890-920°C, tempering temperature 500-550°C), the impact toughness of 26SiMnMo (Charpy V-notch test) can usually reach:

 

Impact absorption energy (Akv) ≥ 39 J
This value indicates that the steel can absorb a large amount of energy without brittle fracture when subjected to sudden impact loads, having strong impact resistance.

2. Balance between Toughness and Strength

The prominent advantage of 26SiMnMo lies in its synergistic performance of strength and toughness:

 

Its tensile strength is as high as ≥ 980 MPa, and yield strength ≥ 835 MPa (high strength level);

At the same time, the elongation is ≥ 12%, which, combined with the impact toughness of ≥ 39 J, means that the steel has a certain plastic deformation capacity before fracture, avoiding the problem of "high strength must lead to brittleness".

 

This balance makes it able to resist heavy loads and cope with sudden impacts in scenarios bearing heavy loads, vibrations or impacts (such as hydraulic cylinders of engineering machinery, transmission components of mining machinery), reducing the risk of fracture.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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