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Material hardness introduction

Material Hardness is one of the key indicators used to evaluate a material's resistance to deformation, wear, and abrasion. Common hardness standards include Vickers Hardness (HV), Brinell Hardness (HB), and Rockwell Hardness (HRC).

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Detailed Explanation of Material Hardness Conversion

Material Hardness is one of the key indicators used to evaluate a material’s resistance to deformation, wear, and abrasion. Common hardness standards include Vickers Hardness (HV), Brinell Hardness (HB), and Rockwell Hardness (HRC). To facilitate the conversion of Material Hardness values under different standards, it is essential to understand the relevant conversion models and practical reference tables.

Material hardness test

Material hardness test

Common HV-HB-HRC Conversion Table

Below is a reference table summarizing the approximate values of HV, HB, and HRC based on experimental data and standard specifications:

HV (Vickers Hardness) HB (Brinell Hardness) HRC (Rockwell Hardness)
100 94
200 190 15
300 285 30
400 380 40
500 475 50
600 570 58
700 665 63

Note: The above values may vary slightly depending on material type and testing conditions.

Conversion formula between HV-HB-HRC

The conversion between different Material Hardness scales (HV, HB, HRC) does not have an exact formula, as they are based on different testing methods and principles. However, they can often be estimated using empirical formulas and conversion tables. Here are some common conversion relationships between hardness scales:

1. Conversion between HV (Vickers Hardness) and HB (Brinell Hardness)

For materials like steel, the following empirical formulas are commonly used for conversion:

HB=0.927×HVHB = 0.927 \times HV HV=1.15×HBHV = 1.15 \times HB

2. Conversion between HV (Vickers Hardness) and HRC (Rockwell Hardness C Scale)

For materials like steel, the following formula is commonly used for conversion:

HRC=0.0023×HV−1.9HRC = 0.0023 \times HV – 1.9

Alternatively, Material Hardness conversion tables are often used, especially for materials with a wide hardness range.

3. Conversion between HB (Brinell Hardness) and HRC (Rockwell Hardness C Scale)

Sometimes, the following formula can be used for approximate conversion:

HRC=0.002×HB−1.2HRC = 0.002 \times HB – 1.2

Notes

  • These conversion formulas are valid for typical materials like steel. For different materials, especially non-metals, the hardness conversion may vary.
  • The formulas provide approximate values; the actual hardness conversion is also influenced by factors such as material composition, microstructure, and heat treatment condition.
  • The most accurate hardness conversion is typically done using experimental data or hardness conversion tables, especially when different hardness measurement methods are used.

Conclusion

Understanding the conversion relationships and quantitative calculations for material hardness is crucial for quality control and material selection in modern industry. Accurate Material Hardness value references and calculations can improve product reliability and optimize costs. If necessary, further customized reference tables can be developed based on specific materials and experimental setups.

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