1. What is HRC to BHN Conversion?

The HRC to BHN conversion provides an approximate relationship between Rockwell C hardness and Brinell hardness numbers. This conversion is useful when comparing material specifications or when only one hardness scale measurement is available.

2. How Does the Calculator Work?

The calculator uses the approximation formula:

Where:

• \( BHN \) — Brinell Hardness Number (unitless)
• \( HRC \) — Rockwell C Hardness (unitless)

Explanation: This formula provides a quick approximation for converting between these two common hardness scales, though exact conversion may vary by material type.

3. Importance of Hardness Conversion

Details: Accurate hardness conversion is crucial for material selection, quality control, and ensuring compliance with engineering specifications across different measurement systems.

4. Using the Calculator

Tips: Enter Rockwell C hardness value between 0-70 HRC. The calculator will provide the approximate Brinell hardness number.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this conversion?
A: This is an approximate conversion. Actual relationship may vary depending on material composition and heat treatment.

Q2: What are typical HRC ranges for common materials?
A: Tool steels: 55-65 HRC, Structural steels: 20-40 HRC, Aluminum alloys: 20-80 BHN (equivalent to ~0-30 HRC).

Q3: When should I use exact conversion tables instead?
A: For critical applications or when material-specific data is available, consult ASTM or ISO conversion tables for greater accuracy.

Q4: Are there limitations to this conversion?
A: The approximation works best for steels. For non-ferrous materials or very hard/soft materials, specialized conversion charts should be used.

Q5: Why convert between hardness scales?
A: Different industries and standards may specify different hardness scales, requiring conversion for comparison and compliance purposes.