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BHN to HRC Conversion Formula:
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The BHN to HRC formula provides an approximate conversion from Brinell hardness number (HB) to Rockwell C hardness (HRC). This conversion is useful in materials science and engineering when comparing hardness measurements between different testing scales.
The calculator uses the approximate conversion formula:
Where:
Explanation: This formula provides a quick approximation for converting between Brinell and Rockwell C hardness scales, though actual conversion may vary based on material properties.
Details: Accurate hardness conversion is essential for material selection, quality control, and comparing test results from different hardness testing methods in manufacturing and engineering applications.
Tips: Enter Brinell hardness number (HB) in the input field. The value must be greater than 0. The calculator will provide the approximate Rockwell C hardness equivalent.
Q1: How accurate is this conversion formula?
A: This is an approximate conversion. Actual conversion may vary depending on material type, heat treatment, and other factors. For precise conversions, consult material-specific conversion charts.
Q2: What are typical HB and HRC ranges for common materials?
A: Mild steel: 120-180 HB (approx. 32-38 HRC), Tool steel: 200-700 HB (approx. 40-68 HRC), Hardened steel: up to 900 HB (approx. 70 HRC).
Q3: When should I use this conversion?
A: Use for quick estimates and general comparisons. For critical applications requiring precise hardness values, use direct measurement with the appropriate hardness testing method.
Q4: Are there limitations to this conversion?
A: Yes, this conversion works best for steel materials and may be less accurate for non-ferrous metals, very soft materials, or extremely hard materials.
Q5: Why are there different hardness scales?
A: Different scales (Brinell, Rockwell, Vickers) use different testing methods and are suited for different materials, thicknesses, and hardness ranges.