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Conversion Formula:
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The conversion from Brinell hardness (HB) to Rockwell C hardness (HRC) is an approximate relationship used in materials science and engineering. While direct conversion isn't perfectly accurate due to different testing methods, this formula provides a useful estimation.
The calculator uses the conversion formula:
Where:
Explanation: This linear approximation works best within certain ranges (typically HB 100-400). The relationship may vary for very soft or very hard materials.
Details: Different industries and applications use different hardness scales. Conversion between scales helps when comparing materials or specifications that use different measurement systems.
Tips: Enter the Brinell hardness number (HB). The value must be positive. The calculator will provide the approximate Rockwell C hardness equivalent.
Q1: How accurate is this conversion?
A: This is an approximate conversion that works best for medium-hard steels. For precise conversions, consult material-specific conversion charts.
Q2: What are typical HB and HRC values for common materials?
A: Mild steel might be ~120 HB (~14 HRC), while hardened tool steel could be ~700 HB (~72 HRC).
Q3: Why are there different hardness scales?
A: Different scales were developed for different material types and hardness ranges. Brinell is better for softer materials, while Rockwell C is better for harder materials.
Q4: Can I use this for non-metallic materials?
A: This conversion is primarily for metals, especially steels. Other materials may require different conversion factors.
Q5: When should I use actual hardness testing instead of conversion?
A: For critical applications or when precise hardness values are required, always perform actual hardness testing using the appropriate scale.