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BHN to HBW Conversion:
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BHN (Brinell Hardness Number) and HBW (Brinell Hardness using Tungsten Carbide Ball) are essentially equivalent hardness scales for steel materials. The conversion maintains the same numerical value as both use the Brinell hardness testing principle.
The calculator uses the direct equivalence conversion:
Where:
Explanation: For most steel applications, BHN and HBW values are numerically equivalent as they represent the same hardness measurement system with different indenter materials.
Details: Accurate hardness conversion is crucial for material specification, quality control, and ensuring mechanical properties meet design requirements in manufacturing and engineering applications.
Tips: Enter the BHN value in the input field. The calculator will provide the equivalent HBW value. All values must be valid positive numbers.
Q1: What is the difference between BHN and HBW?
A: BHN traditionally used steel ball indenters, while HBW uses tungsten carbide balls. For practical purposes in steel testing, they are considered equivalent.
Q2: Are BHN and HBW always equal?
A: For most steel materials, yes. However, for very hard materials or specific alloys, slight variations may occur due to different indenter properties.
Q3: What are typical BHN/HBW values for common steels?
A: Mild steel: 120-180 BHN, Tool steel: 200-700 BHN, Hardened steel: 400-650 BHN depending on heat treatment.
Q4: When should I use this conversion?
A: When working with material specifications that use different Brinell hardness notations, or when comparing historical data with current standards.
Q5: Is this conversion applicable to all materials?
A: Primarily for ferrous materials. For non-ferrous materials or very soft/hard materials, specific conversion charts should be consulted.