Hardness is a material's resistance to penetration that is measured by pressing an indenter into the material's surface under a specific load and measuring the indentation. Hardness properties include resistance to abrasion, plastic deformation, and brittleness. There are different hardness testing methods like Rockwell, Brinell, Vickers, and Mohs tests that apply standardized loads and indenters, as hardness values are arbitrary and have no absolute standards. The document provides contact information for an organization that performs various hardness tests.

1. Portable Hardness

2. Portable Hardness
 Hardness is a material's resistance to
penetration.
 In general, an indenter is pressed into the surface
of the material to be tested under a specific load
for a definite time interval, and a measurement is
made of the size or depth of the indentation.

3. Hardness properties
include such varied
attributes as resistance to
abrasives, resistance to
plastic deformation, high
modulus of elasticity, high
yield point, high
strength, absence of
elastic damping, brittleness
or lack of ductility.

4.  Basically hardness values are arbitrary, and there
are no absolute standards for hardness
 Hardness has no quantitative value, except in
terms of a given load applied in a
specific, reproducible manner and with a
specified indenter shape.

5. Some Hardness Testing Methods are :
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Rockwell Hardness Test
Rockwell Superficial Hardness Test
Brinell Hardness Test
Vickers Hardness Test
Mohs Hardness Test

6. Contact us
 Address: BA-15, Mangolpuri Industrial Area
Phase-II Delhi-110034(India)
Ph No: +91-11-49491414/15
Fax: +91-11-4385 2040
Email: info@sigmatest.org
Email: rahul@sigmatest.org
Website: www.sigmatest.org
Contact person: Mr. Rahul Gupta
Mobile: +91- 9811565000