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Brinell to Rockwell C Conversion Formula:
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Brinell to Rockwell C conversion provides an approximate relationship between two different hardness measurement scales. The Brinell hardness test uses a tungsten carbide ball indenter, while Rockwell C uses a diamond cone indenter with different load conditions.
The calculator uses the approximation 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: Hardness conversion is essential in materials engineering and quality control when different testing methods are used or when comparing specifications from various standards and suppliers.
Tips: Enter the Brinell Hardness Number (BHN) in the input field. The value must be greater than 0. The calculator will provide the approximate Rockwell C equivalent.
Q1: How accurate is this conversion?
A: This is an approximation formula. For precise conversions, consult official conversion charts or standards as the relationship can vary by material type.
Q2: What materials is this conversion suitable for?
A: This approximation works best for steel and iron alloys. Different conversion factors may be needed for non-ferrous metals and other materials.
Q3: Why are there different hardness scales?
A: Different scales were developed for different materials and hardness ranges. Brinell is better for coarse-grained materials, while Rockwell C is faster and more precise for hardened steels.
Q4: What is the typical range for this conversion?
A: The approximation works reasonably well for BHN values between 150-450, corresponding to approximately 2.5-17.5 HRC.
Q5: When should I use exact conversion tables instead?
A: For critical applications, quality control, or material certification, always refer to official conversion standards like ASTM E140.