Hardness: Metal Unit Converter

Professional engineering tool based on ASTM E140 & ISO 18265. Accurate conversion for 11 hardness scales plus tensile strength. Essential tool for engineers.

Hardness is a professional metal hardness conversion tool designed for mechanical engineers, materials scientists, and workshop technicians. Strictly compliant with ASTM E140 and ISO 18265 standards, providing the most accurate conversions for HRC, HV, HB and 11 other hardness scales plus tensile strength estimation.

【Core Features】 • Complete Conversion: Supports HRC, HV, HRA, HRB, HRD, HBW, HBS, HS, HR15N/30N/45N and all major standards • Tensile Strength Estimation: Exclusive steel tensile strength (MPa) estimation based on Vickers hardness • Standards-Based: Data sourced from ASTM E140 and ISO 18265 - no unreliable algorithms • Smart Alerts: Automatically flags values "outside standard range" to ensure engineering rigour • Offline Capable: Pure local calculation, works even in deep workshop areas without network • History: Save conversion history for easy reference and comparison • Multi-language: Supports Chinese, English, Japanese, German, French, Spanish, Russian and more

【Use Cases】 Whether you're designing heat treatment processes, selecting mould materials, or verifying drawings at CNC machining sites, Hardness is the essential pocket reference you need.

【About Us】 Hardness is dedicated to providing professional and precise engineering tools for the metalworking industry. We strive to simplify complex standards and calculations into intuitive and easy-to-use applications.

For suggestions or feedback, please contact us through the in-app feedback feature.