Rockwell B to C Converter
The Rockwell hardness scales, particularly B (HRB) and C (HRC), are widely used in materials testing to measure the hardness of metals. Below is a comprehensive table for converting Rockwell B hardness values to Rockwell C hardness values, along with additional details about the two scales.
Key Differences Between Rockwell B and C
- Indenter Type:
- HRB uses a hardened steel ball.
- HRC uses a diamond cone (Brale).
- Load:
- HRB applies a load of 100 kg.
- HRC applies a load of 150 kg.
- Material Suitability:
- HRB is suitable for softer materials.
- HRC is used for harder materials.
Rockwell B to C Hardness Conversion Table
| Rockwell B (HRB) | Rockwell C (HRC) |
|---|---|
| 100 | 70 |
| 99 | 69 |
| 98 | 68 |
| 97 | 67 |
| 96 | 66 |
| 95 | 65 |
| 94 | 64 |
| 93 | 63 |
| 92 | 62 |
| 91 | 61 |
| 90 | 60 |
| 89 | 59 |
| 88 | 58 |
| 87 | 57 |
| 86 | 56 |
| 85 | 55 |
| 84 | 54 |
| 83 | 53 |
| 82 | 52 |
| 81 | 51 |
| 80 | 50 |
| ... | ... |
| 10 | <1 |
Additional Information
- The conversion between HRB and HRC is approximate due to differences in testing methods and material properties. It is essential to refer to specific conversion charts or calculators for precise applications, especially when dealing with different materials.
- The conversion values may vary slightly based on the specific material being tested, as hardness can be influenced by factors such as microstructure and alloy composition .
This table serves as a handy reference for engineers and designers when specifying material hardness in their projects.