1. What is Brinell to Rockwell C Conversion?

The Brinell to Rockwell C conversion provides an approximate relationship between two different hardness measurement scales. This conversion is useful when comparing materials tested using different hardness testing methods or when specific testing equipment is unavailable.

2. How Does the Calculator Work?

The calculator uses the approximation formula:

Where:

• \( HRC \) — Rockwell C hardness (unitless)
• \( HB \) — Brinell hardness number

Explanation: This formula provides a rough approximation for converting between Brinell and Rockwell C hardness scales. The relationship is linear in this approximation.

3. Importance of Hardness Conversion

Details: Hardness conversion is important for material selection, quality control, and comparing test results from different laboratories using various hardness testing methods.

4. Using the Calculator

Tips: Enter the Brinell hardness value (HB) in the input field. The value must be greater than 0. The calculator will provide the approximate Rockwell C hardness equivalent.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this conversion?
A: This is an approximate conversion. For precise measurements, actual hardness testing using the appropriate method is recommended.

Q2: What are typical HB and HRC values for common materials?
A: Mild steel: 120-150 HB (20-25 HRC), Tool steel: 600-700 HB (60-65 HRC), Hardened steel: 400-600 HB (40-60 HRC).

Q3: When should I use this conversion?
A: Use for quick estimates and general comparisons. Not recommended for critical applications where precise hardness values are required.

Q4: Are there limitations to this conversion?
A: Yes, the relationship between HB and HRC is not perfectly linear and varies with material type, heat treatment, and other factors.

Q5: What is the range of validity for this conversion?
A: This approximation works best for common steel alloys in the range of approximately 100-700 HB.