1. What is HRC to HRA Conversion?

HRC (Rockwell C) to HRA (Rockwell A) conversion is used to translate hardness values between different Rockwell scales. This conversion is important when comparing materials tested on different scales or when a specific scale is required for quality control purposes.

2. How Does the Calculator Work?

The calculator uses standard conversion tables to convert HRC values to equivalent HRA values:

Where:

• HRC — Rockwell C hardness value (20-70)
• HRA — Equivalent Rockwell A hardness value

Explanation: The conversion follows standardized tables that provide approximate equivalencies between different Rockwell hardness scales.

3. Importance of Hardness Conversion

Details: Accurate hardness conversion is crucial for material specification, quality control, and comparing test results from different testing methods or laboratories.

4. Using the Calculator

Tips: Enter HRC value between 20-70. The calculator will provide the approximate equivalent HRA value based on standard conversion tables.

5. Frequently Asked Questions (FAQ)

Q1: Why convert between HRC and HRA?
A: Different materials and applications may require testing on specific Rockwell scales. Conversion allows comparison and specification across different testing methods.

Q2: How accurate is the conversion?
A: Conversion tables provide approximate equivalencies. For critical applications, actual testing on the required scale is recommended.

Q3: What materials typically use HRA scale?
A: HRA is often used for very hard materials like cemented carbides, thin steel, and shallow case hardened parts.

Q4: What's the typical HRC range for conversion?
A: Standard conversion tables typically cover HRC values from 20 to 70, corresponding to HRA values from approximately 61 to 85.

Q5: Are conversion values exact?
A: No, conversion values are approximate and may vary slightly between different standards and materials.