200 BHN To HRC Calculator

BHN to HRC Conversion Formula:

\[ HRC \approx (BHN \times 0.34) - 13 \]

Rockwell C Hardness (HRC):

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1. What is BHN to HRC Conversion?

The BHN to HRC conversion allows you to approximate Rockwell C hardness values from Brinell hardness numbers. This is particularly useful when you need to compare hardness measurements between different testing methods or when only one type of measurement is available.

2. How Does the Calculator Work?

The calculator uses the conversion formula:

\[ HRC \approx (BHN \times 0.34) - 13 \]

Where:

\( BHN \) — Brinell Hardness Number
\( HRC \) — Rockwell C Hardness
0.34 — Conversion coefficient
13 — Adjustment constant

Note: This conversion provides an approximation and is most accurate for BHN values around 200. For precise measurements, direct testing with the appropriate method is recommended.

3. Importance of Hardness Conversion

Details: Understanding hardness conversions is crucial in materials engineering, quality control, and manufacturing processes where different hardness testing methods may be used interchangeably or when comparing material specifications.

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 Hardness (HRC) equivalent.

5. Frequently Asked Questions (FAQ)

Q1: How accurate is this conversion?
A: This conversion provides an approximation and is most accurate for BHN values around 200. For critical applications, direct measurement with the appropriate hardness testing method is recommended.

Q2: What are typical BHN and HRC ranges?
A: BHN typically ranges from 100-700 for most metals, while HRC ranges from 20-70 for hardened steels. The conversion is most reliable in the middle ranges.

Q3: When should I use this conversion?
A: Use this conversion for preliminary estimates, material selection, or when you need to compare hardness values from different testing methods. For final quality control, use the actual testing method required by your specifications.

Q4: Are there limitations to this conversion?
A: Yes, conversions between different hardness scales are approximations and may vary based on material type, heat treatment, and testing conditions. The relationship is not perfectly linear across all hardness ranges.

Q5: Can I use this for all materials?
A: This conversion is primarily designed for steels. For non-ferrous materials or special alloys, different conversion formulas or direct testing may be necessary.