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BHN to HV Conversion Formula:
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The BHN to HV conversion allows estimation of Vickers hardness from Brinell hardness number using an empirical relationship. This is useful when direct Vickers testing is not available or when comparing hardness values across different testing methods.
The calculator uses the conversion formula:
Where:
Explanation: This empirical formula provides an approximate conversion between Brinell and Vickers hardness scales, which are both commonly used in materials testing.
Details: Converting between hardness scales is important for material specification, quality control, and when comparing data from different testing methods or historical records.
Tips: Enter the Brinell hardness number (BHN) in the input field. The value must be greater than 0. The calculator will provide the estimated Vickers hardness.
Q1: How accurate is this conversion?
A: This is an approximate conversion. Actual relationship may vary depending on material type and testing conditions. For critical applications, direct measurement is recommended.
Q2: What are typical BHN values for common materials?
A: Mild steel: 120-180 BHN, Tool steel: 200-700 BHN, Aluminum alloys: 50-150 BHN, depending on heat treatment and composition.
Q3: When should I use this conversion?
A: Use for preliminary estimates, material selection, or when only Brinell data is available but Vickers values are required for comparison.
Q4: Are there limitations to this conversion?
A: Accuracy decreases at extreme hardness values and may vary between different material groups. The relationship is not linear across all hardness ranges.
Q5: What's the difference between BHN and HV testing methods?
A: Brinell uses a 10mm ball indenter with high loads, while Vickers uses a pyramid-shaped diamond indenter with lower loads, providing better resolution for harder materials.