HRC to Brinell Converter

About This Tool

This tool converts a hardness value from Rockwell C (HRC) to the Brinell scale (HB) using standard conversion tables derived from ASTM E140 and ISO 18265. It is designed for engineers, metallurgists, and quality control professionals who need reliable cross-scale hardness data for material specification, supplier audits, and failure analysis.
Conceptually, the user selects the source scale (HRC) and enters a numeric value, then chooses the target scale (HB). The implementation references published mappings and performs interpolation between reference points to produce a best-fit HB value, with a note indicating the standard used. For inputs outside published ranges, the tool flags extrapolation and returns the closest known value with a caution.
Core value lies in speed, consistency, and adherence to recognized standards. The converter supports edge cases near scale limits and can optionally report the underlying table or curve used for the calculation. It also supports extension to additional scales such as HV or HRB when configured, while keeping the default workflow focused on HRC→HB.
Use cases span material qualification, heat-treatment validation, supplier data reconciliation, and cross-document harmonization in engineering and manufacturing. By delivering a standards-based Brinell value from an HRC input, it reduces manual lookup time, improves traceability, and minimizes interpretation errors in quality records.

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