HV to BHN Calculator

Conversion Formula:

\[ BHN \approx HV \times (1 - 0.00065 \times (HV - 100)) \]

Brinell Hardness Number (BHN):

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1. What is HV to BHN Conversion?

The HV to BHN conversion provides an approximate conversion between Vickers hardness (HV) and Brinell hardness number (BHN). This conversion is useful when comparing material hardness values measured using different testing methods.

2. How Does the Calculator Work?

The calculator uses the conversion formula:

\[ BHN \approx HV \times (1 - 0.00065 \times (HV - 100)) \]

Where:

\( HV \) — Vickers hardness value
\( BHN \) — Brinell hardness number
0.00065 — Conversion coefficient

Explanation: This formula provides an approximate conversion that accounts for the differences in testing methods and indenter geometry between Vickers and Brinell hardness tests.

3. Importance of Hardness Conversion

Details: Accurate hardness conversion is crucial for material selection, quality control, and comparing hardness data from different testing methods in engineering and manufacturing applications.

4. Using the Calculator

Tips: Enter the Vickers hardness value (HV) in the input field. The value must be positive and greater than zero for accurate conversion.

5. Frequently Asked Questions (FAQ)

Q1: Why convert between HV and BHN?
A: Different industries and standards may use different hardness testing methods. Conversion allows comparison of hardness values across different testing systems.

Q2: How accurate is this conversion?
A: This conversion provides an approximate value. For critical applications, direct measurement using the appropriate testing method is recommended.

Q3: What are the typical ranges for HV and BHN?
A: Vickers hardness typically ranges from 100-3000 HV, while Brinell hardness typically ranges from 100-650 BHN for most engineering materials.

Q4: When is this conversion most useful?
A: This conversion is particularly useful when comparing material specifications, quality control data, or when only one hardness value is available but the other is required.

Q5: Are there limitations to this conversion?
A: Yes, the accuracy may vary depending on material type, hardness range, and specific testing conditions. The conversion is most reliable for steels and similar materials.