Bhn to Hrc Conversion Formula

Brinell to Rockwell C Conversion Formula:

\[ HRC \approx (BHN \times 0.34) - 13 \]

Rockwell C Hardness (HRC):

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1. What is the Bhn to Hrc Conversion Formula?

The Bhn to Hrc conversion formula provides an approximate conversion between Brinell Hardness Number (BHN) and Rockwell C Hardness (HRC). This conversion is useful when comparing material hardness values measured using different testing methods.

2. How Does the Calculator Work?

The calculator uses the conversion formula:

\[ HRC \approx (BHN \times 0.34) - 13 \]

Where:

\( HRC \) — Rockwell C Hardness
\( BHN \) — Brinell Hardness Number
\( 0.34 \) — Conversion coefficient
\( 13 \) — Conversion constant

Explanation: This formula provides an approximate conversion and may vary slightly depending on material composition and testing conditions.

3. Importance of Hardness Conversion

Details: Accurate hardness conversion is crucial for material selection, quality control, and comparing hardness values from different testing methods in engineering and manufacturing applications.

4. Using the Calculator

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 Hardness (HRC) equivalent.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this conversion formula?
A: This formula provides an approximate conversion. For precise conversions, consult material-specific conversion charts or standards.

Q2: What are typical BHN and HRC values for common materials?
A: Mild steel typically ranges 120-180 BHN (approx. 20-45 HRC), while hardened tool steel can reach 600-700 BHN (approx. 55-65 HRC).

Q3: When should I use this conversion?
A: Use this conversion when you need to compare hardness values or when only one hardness scale measurement is available but the other is required.

Q4: Are there limitations to this conversion?
A: Yes, conversions are approximate and can vary based on material type, heat treatment, and testing conditions. Always refer to standardized conversion tables for critical applications.

Q5: Can this conversion be used for all materials?
A: While generally applicable to ferrous metals, the accuracy may vary for non-ferrous materials, alloys, and special steel grades.