Brinell to Rockwell Calculator

The Brinell to Rockwell hardness conversion is a practical tool for metallurgists and engineers. It helps convert hardness values measured using the Brinell scale (HBW) into the Rockwell C scale (HRC), which is commonly used in industry, especially for steel and other metals.

Conversion Formula

The conversion from Brinell to Rockwell C is often an estimation, and one common formula used is:

\[ \text{HRC} = \frac{\text{HBW} - 70}{2} \]

This formula provides a rough approximation of Rockwell C hardness based on the Brinell hardness value. Keep in mind that different materials may require specific conversion charts.

Example Calculation

For a material with a Brinell hardness of 200:

\[ \text{HRC} = \frac{200 - 70}{2} = 65 \]

Importance and Usage Scenarios

Understanding material hardness is crucial in selecting the appropriate material for different applications. Hardness impacts wear resistance, machinability, and other material properties. This calculator aids in quickly converting between these two commonly used hardness scales.

Common FAQs

1. What is Brinell Hardness (HBW)?

   • Brinell Hardness measures a material’s resistance to indentation using a hardened steel or carbide ball. It's suitable for softer materials like cast iron or aluminum.

2. What is Rockwell Hardness (HRC)?

   • Rockwell Hardness measures indentation depth using a diamond cone. The HRC scale is commonly used for hardened steel and other tough materials.

3. How accurate is this conversion?

   • The conversion provides an estimate. For precise applications, refer to material-specific conversion charts.