A test for resistance to indentation, using a diamond or steel ball, under pressure, to pierce the test specimen. The degree of penetration under varying kilograms of pressure-loading is carefully measured. First a "minor load" of 10 kilograms is applied, then a "major load" (60 to 150 kg, depending on the test method and scale being used). The scale used here employs a 100kg major load. The higher the number, the greater the surface hardness. This gives engineers a set of comparable ratings with which to describe the relative hardness of any plastics material.
an arbitrarily defined measure of resistance of a material to indentation under static or dynamic load
A measure of hardness by determining the depth of penetration of a penetrator into the specimen under certain fixed conditions of test. The penetrator may be either a steel ball or a diamond sphero-conical penetrator. The hardness number is related to the depth of the indentation and the higher the number the harder the material.
Forcing a cone-shaped diamond or hardened steel ball into the specimen being tested under standard pressure. The depth of penetration is an indication of the Rockwll Hardness.
An indentation hardness test based on the depth of penetration of a specified penetrator into the specimen under certain arbitrarily fixed conditions.
A method for determining the relative hardness of a metal by impressing a diamond indentor, or a 1/16" or 1/8" ball into a ground surface with a prescribed load not exceeding 150Kg. This test is normally used on small hardened parts, or on surfaces where the larger impression made by the Brinell hardness test is undesirable.
A popular measurement system describing the resistance of a given metal product to surface indentation. Rockwell measurements are expressed in numbers and symbols that reflect a specific penetration devise, the amount of force applied, and the dial used to perform the measurement.
Test designed to measure the hardness of the fastener, based on an alphabetical-numerical scale. The higher the number, the harder the fastener. Rockwell tests are utilized to test for decarburization and carburization and to determine the amount of resistance to permanent deformation during the testing procedure. They also assure that heat treating was performed to specification. ASTM standards require socket screw products meet specific Rockwell Hardness Standards. Socket screws are typically in the "C" scale, which is the hardest Rockwell designation, but the scale designation is dependent on the size of the socket screw.
A test used to measure the hardness of a substance. A steel ball or cone is impacted on the material and the impression is measured.
a standard test used to determine the hardness of steel whereby a diamond point is forced in a finished blade at a set pressure. The depth of penetration is then measured. Hardness above 60 will be hard to sharpen, while hardness below 56 will not hold an edge well.