1. What is BHN to Rockwell C Conversion?

The BHN to Rockwell C conversion provides an approximate method to convert Brinell hardness numbers to Rockwell C scale values. This conversion is useful in materials testing and quality control applications where different hardness scales are used.

2. How Does the Calculator Work?

The calculator uses the conversion formula:

Where:

• \( BHN \) — Brinell Hardness Number
• \( Rockwell\ C \) — Rockwell C hardness value

Explanation: This formula provides an approximate conversion between the two hardness scales, with the relationship being inversely proportional.

3. Importance of Hardness Conversion

Details: Accurate hardness conversion is essential for material specification, quality control, and ensuring compatibility between different testing methods used in various industries.

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 equivalent.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this conversion?
A: This conversion provides an approximate value. For precise conversions, refer to standardized conversion tables or conduct actual hardness testing.

Q2: What are typical BHN values for common materials?
A: Mild steel: 120-180 BHN, Tool steel: 200-700 BHN, Hardened steel: 400-600 BHN, Aluminum alloys: 50-150 BHN.

Q3: When is this conversion most useful?
A: This conversion is most useful for quick estimates and when standardized conversion tables are not readily available.

Q4: Are there limitations to this conversion?
A: Yes, this is an approximate conversion and may not be accurate for all materials or extreme hardness values. Always verify with standardized tables when precision is required.

Q5: What is the difference between BHN and Rockwell C testing?
A: BHN uses a 10mm ball indenter with high loads, while Rockwell C uses a diamond cone indenter with lighter loads. Each method has different applications and advantages.