Hardness Conversion Calculator Online

Hardness Conversion:

\[ \text{Hardness}_{\text{new}} = \text{Conversion Table}(\text{Hardness}_{\text{old}}) \]

Hardness Value:

From Scale:

To Scale:

Converted Hardness Value:

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1. What is Hardness Conversion?

Hardness conversion is the process of converting hardness values between different measurement scales (Brinell, Rockwell, Vickers, Knoop). Different industries and materials often use different hardness scales, making conversion necessary for comparison.

2. How Does the Calculator Work?

The calculator uses approximate conversion formulas between hardness scales:

\[ \text{Hardness}_{\text{new}} = \text{Conversion Table}(\text{Hardness}_{\text{old}}) \]

Where:

HB — Brinell Hardness Number
HRB — Rockwell B Hardness Number
HRC — Rockwell C Hardness Number
HV — Vickers Hardness Number
HK — Knoop Hardness Number

Explanation: The calculator first converts the input hardness to Vickers (HV) as an intermediate scale, then converts to the target scale.

3. Importance of Hardness Conversion

Details: Accurate hardness conversion is crucial when comparing material specifications from different sources, or when equipment is only available for certain hardness tests.

4. Using the Calculator

Tips: Enter the hardness value, select the original scale and target scale. The calculator will provide the converted value. Note that conversions are approximate and may vary by material.

5. Frequently Asked Questions (FAQ)

Q1: Are hardness conversions exact?
A: No, conversions are approximate and can vary by material composition. For critical applications, actual testing on the desired scale is recommended.

Q2: Which hardness scale is most accurate?
A: All scales are accurate when properly performed. Vickers and Brinell tests are generally considered more consistent across different materials.

Q3: When should I use Rockwell vs Brinell?
A: Rockwell tests are faster and better for production environments. Brinell is better for rough or heterogeneous materials.

Q4: Can I convert between all hardness scales?
A: Most common scales can be converted, but accuracy decreases at extreme hardness values or for very soft materials.

Q5: Why is Vickers used as the intermediate scale?
A: Vickers hardness tests are applicable to all materials and have a wide range, making them a good reference for conversions.