Convert Hrb To Hrc Calculator

Rockwell B to C Conversion:

Conversion uses tables or approximate formulas; no universal formula, often table-based from ASTM E140.

HRC (Rockwell C scale):

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1. What is Rockwell Hardness Conversion?

The Rockwell hardness test measures the hardness of materials. The B and C scales are commonly used for different material types. Conversion between scales is needed when comparing materials tested on different scales.

2. How Does the Calculator Work?

The calculator uses approximate conversion formulas based on ASTM E140 standards:

For HRB 60-70: HRC ≈ (HRB - 60) × 0.7

For HRB 70-80: HRC ≈ (HRB - 70) × 0.7 + 7

For HRB 80-90: HRC ≈ (HRB - 80) × 0.6 + 14

For HRB 90-100: HRC ≈ (HRB - 90) × 0.4 + 20

Note: These are approximate relationships. For precise conversions, consult ASTM E140 standard tables.

3. Importance of Hardness Conversion

Details: Accurate hardness conversion is crucial for material specification, quality control, and comparing test results from different scales.

4. Using the Calculator

Tips: Enter HRB value between 0-100. The calculator will provide the approximate HRC equivalent. Values below HRB 60 typically convert to HRC 0.

5. Frequently Asked Questions (FAQ)

Q1: Why convert between Rockwell scales?
A: Different materials require different Rockwell scales (B for softer, C for harder materials), but comparisons often require conversion.

Q2: How accurate are these conversions?
A: These are approximate. For critical applications, consult ASTM E140 standard conversion tables.

Q3: Can I convert HRC to HRB with this?
A: No, this calculator only converts HRB to HRC. A separate calculator would be needed for reverse conversion.

Q4: What materials use HRB scale?
A: HRB is typically used for softer metals like aluminum, brass, and mild steel.

Q5: What materials use HRC scale?
A: HRC is used for harder materials like hardened steels and tool steels.