Gordon England Surface Engineering Forum

Calculator for Conversion between
Vickers Hardness Number and SI Units MPa and GPa

HV
HV MPa
HV GPa


There is now a trend towards reporting Vickers hardness in SI units (MPa or GPa) particularly in academic papers. Unfortunately, this can cause confusion. Vickers hardness (e.g. HV/30) value should normally be expressed as a number only (without the units kgf/mm2). Rigorous application of SI is a problem. Most Vickers hardness testing machines use forces of 1, 2, 5, 10, 30, 50 and 100 kgf and tables for calculating HV. SI would involve reporting force in newtons (compare 700 HV/30 to HV/294 N = 6.87 GPa) which is practically meaningless and messy to engineers and technicians. To convert a Vickers hardness number the force applied needs converting from kgf to newtons and the area needs converting from mm2 to m2 to give results in pascals using the formula below.

HV = Vickers hardness
Vickers Pyramid Hardness Formula


To convert HV to MPa multiply by 9.807
To convert HV to GPa multiply by 0.009807


To use the conversion calculator simply enter a number value into the desired field and click calculate. All results shown will be equivalent values. Values are given to four significant figures (the odd result may show 9's or 0's over running). Values of 10 000 or greater will be displayed in the e-format e.g. 2.3456e7 which equals 2.3456 x 107 or 23 456 000. Values lower than 0.001 will be displayed in the e-format e.g. 2.3456e-5 which equals 2.3456 x 10-5 or 0.000 023456. The calculators require that your browser has java script enabled.





LINKS TO:
Hardness Testing
Rockwell Hardness Test
Rockwell Superficial Hardness Test
Brinell Hardness Test
Vickers Hardness Test
Microhardness Test
Mohs Hardness Test
Scleroscope and other hardness testing methods

TABLES and CHARTS:
Hardness Conversion Table (colour version - may take time to load)
Hardness Conversion Table (non-colour version)
Hardness Conversion Chart (1)
Hardness Conversion Chart (2)
Chart of Brinell, Vickers and Ultimate Tensile Strength Equivalents (1)
Chart of Brinell, Vickers and Ultimate Tensile Strength Equivalents (2)
Hardness Conversion Table related to Rockwell C Hardness Scale (hard materials) (colour)
Hardness Conversion Table related to Rockwell C Hardness Scale (hard materials) (non-colour)
Hardness Conversion Chart related to Rockwell C Hardness Scales (hard materials)
Estimated Hardness Equivalent Chart related to Rockwell C and Vickers (hard materials)
Hardness Conversion Table related to Rockwell B Hardness Scale (soft metals) (colour)
Hardness Conversion Table related to Rockwell B Hardness Scale (soft metals) (non-colour)
Hardness Conversion Chart related to Rockwell B Hardness Scale (soft metals)
Table of Minimum Test Piece Thickness for Rockwell Hardness Testing using Ball Indenters
Table of Minimum Test Piece Thickness for Rockwell Hardness Testing using Diamond Indenters
HV, MPa and GPa Conversion Calculator



Custom Search


Gordon England Independent Thermal Spray Coating Consultant
Telephone: +44 (0) 1252 405186
Mobile: 07951 120293
PLEASE CLICK HERE TO EMAIL

www.gordonengland.co.uk

Nature of Thermal Spray Coatings
Surface Engineering in a Nutshell
Wear
Corrosion
Photomicrographs
Glossary of Thermal Spray and Surface Engineering Terms
Image Directory
Plasma Gas Flow Information
Plasma Gas Flow Correction Calculator
Contact Form
Links to other interesting sites

Periodic Table of the Elements
SI Units * Calculators for Conversion between Units of Measurement
Hardness Testing
Surface Engineering Forum
Photography Gallery
Search This Site




© Copyright Gordon England