1. What is HRA to HRC Conversion?

The HRA to HRC conversion translates Rockwell A scale hardness values to Rockwell C scale values. These are different scales used to measure material hardness, with HRC being more common for harder materials.

2. How Does the Calculator Work?

The calculator uses standard conversion tables:

Where:

• \( HRA \) — Rockwell A hardness value
• \( HRC \) — Converted Rockwell C hardness value

Explanation: The conversion uses empirically determined tables as the relationship between scales is non-linear and material-dependent.

3. Importance of Hardness Conversion

Details: Converting between hardness scales is essential when comparing materials tested on different scales or when specifications require a particular scale.

4. Using the Calculator

Tips: Enter HRA value (typically between 60-90 for convertible ranges). The calculator provides the approximate equivalent HRC value.

5. Frequently Asked Questions (FAQ)

Q1: Why convert between HRA and HRC?
A: Different industries and applications use different scales. Conversion allows comparison and ensures compliance with specifications.

Q2: Is the conversion exact?
A: No, conversions are approximate as the scales measure differently. For critical applications, test with the required scale.

Q3: What materials is this conversion valid for?
A: Primarily steel alloys. The relationship varies for other materials.

Q4: What's the typical range for conversion?
A: HRA 60-90 typically converts to HRC 20-70, but exact values depend on material composition.

Q5: Are there other hardness scales?
A: Yes, including Brinell (HB), Vickers (HV), and Rockwell B (HRB), each with their own conversion tables.