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Brinell to Rockwell C Conversion Formula:
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The Brinell to Rockwell C conversion provides an approximate relationship between Brinell Hardness Number (BHN) and Rockwell C (HRC) hardness scales. This conversion is useful when comparing materials tested with different hardness measurement methods.
The calculator uses the polynomial approximation formula:
Where:
Explanation: This polynomial equation provides an approximate conversion between the two hardness scales, though actual conversion may vary based on material composition and testing conditions.
Details: Converting between hardness scales is essential for material specification, quality control, and when comparing data from different testing methods or when specific testing equipment is unavailable.
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 approximate conversion. Actual values may vary depending on material type, heat treatment, and specific testing conditions.
Q2: What are typical BHN values for common materials?
A: Mild steel: 120-180 BHN, Hardened steel: 200-600 BHN, Aluminum alloys: 50-150 BHN, depending on temper and alloy composition.
Q3: When should I use this conversion?
A: Use for general reference and material specification. For critical applications, actual hardness testing with the required scale is recommended.
Q4: Are there limitations to this conversion?
A: Yes, the conversion is less accurate at extreme hardness values and may not account for material-specific characteristics or different testing methodologies.
Q5: Can this conversion be used for all materials?
A: While generally applicable to ferrous metals, the conversion may be less accurate for non-ferrous materials, plastics, or specialized alloys.