Home
Back
Rockwell B to C Conversion Formula:
| From: | To: |
The Rockwell B to C conversion provides an approximate relationship between Rockwell B and Rockwell C hardness scales. This conversion is useful when comparing materials tested on different Rockwell scales or when historical data uses different measurement systems.
The calculator uses the conversion formula:
Where:
Explanation: This formula provides an approximate conversion between the two Rockwell scales, with the relationship being inversely proportional - as HRB increases, HRC decreases.
Details: Accurate hardness conversion is crucial for material selection, quality control, and comparing test results across different Rockwell scales used in various industries and applications.
Tips: Enter Rockwell B hardness value between 0-130 HRB. The calculator will provide the approximate equivalent Rockwell C hardness value.
Q1: Why convert between Rockwell B and C scales?
A: Different materials are better suited to different Rockwell scales, and conversion allows comparison of hardness values across scales for material selection and specification purposes.
Q2: How accurate is this conversion?
A: This is an approximate conversion. For precise measurements, direct testing on the appropriate Rockwell scale is recommended as the relationship may vary by material type.
Q3: What are typical HRB and HRC ranges?
A: Rockwell B scale typically measures softer materials (0-100 HRB), while Rockwell C scale measures harder materials (20-70 HRC). The conversion bridges these overlapping ranges.
Q4: When should I use Rockwell B vs Rockwell C testing?
A: Use Rockwell B for softer materials like copper alloys, aluminum, and soft steels. Use Rockwell C for harder materials like hardened steels and tool steels.
Q5: Are there limitations to this conversion?
A: Yes, the conversion is approximate and may not be accurate for all materials. It works best for steels and may be less reliable for non-ferrous materials or materials with unique hardness characteristics.