1. What is HRC to 15N Conversion?

The HRC (Rockwell C) to 15N (Superficial Rockwell 15N) conversion provides equivalent hardness values between these two scales. This is useful when comparing materials tested with different hardness measurement methods.

2. How Does the Calculator Work?

The calculator uses standard conversion tables or formulas:

Where:

• HRC — Rockwell C hardness value
• 15N — Superficial Rockwell 15N hardness value

Explanation: The conversion is based on empirical data comparing hardness measurements using different scales.

3. Importance of Hardness Conversion

Details: Accurate hardness conversion is crucial when comparing material specifications or test results that use different hardness scales, especially in metallurgy and materials science.

4. Using the Calculator

Tips: Enter a valid HRC value (typically between 20-70 for most materials). The calculator will provide the equivalent 15N value.

5. Frequently Asked Questions (FAQ)

Q1: What's the difference between HRC and 15N scales?
A: HRC uses a major load of 150kg with a diamond indenter, while 15N uses a 15kg minor load with a diamond indenter for superficial hardness testing.

Q2: Is the conversion exact?
A: No, conversions between hardness scales are approximate as they depend on material properties and test conditions.

Q3: When should I use this conversion?
A: When comparing hardness values from different testing methods or when specifications reference a different scale than your test results.

Q4: Are there limitations to this conversion?
A: Yes, conversions are most accurate for steels. Other materials may have different conversion relationships.

Q5: Where can I find official conversion tables?
A: ASTM E140 and ISO 18265 standards provide comprehensive hardness conversion tables.