Category: ‘Mechanical’
Applies for plain carbon and low-alloy steels and cast steel and to a limited extent for high-alloy and/or work hardened steel.
Hardness Conversion Table
Tensile
Strength
(N/mm2)>
Brinell Hardness
(BHN)
Vicke... Read More...
The proportional limit is the highest stress at which stress is linearly proportional to strain. This is the same as the elastic limit for most materials. Some materials may show a slight deviation from proportionality while stil... Read More...
The elastic limit is the highest stress at which all deformation strains are fully recoverable. For most materials and applications this can be considered the practical limit to the maximum stress a component can withstand and st... Read More...
Strength has several definitions depending on the material type and application. Before choosing a material based on its published or measured strength it is important to understand the manner in which strength is defined and how... Read More...
Creep is slow, temperature aided, time dependent deformation. Creep is typically a factor in materials above one third of their absolute melting temperature or two thirds of their glass transition temperature. Creep resistance is... Read More...
Thermal conductivity
The thermal conductivity is the rate of heat transfer through a material in steady state. It is not easily measured, especially for materials with low conductivity but reliable data is readily available for ... Read More...
Corrosion damage in three types of concrete (C25, C45, and C55), resulting from Hydrochloric Acid HCL with various contents, was investigated by comparing the mechanical properties of different types of concrete and their ... Read More...
Density
Density is one of the most fundamental physical properties of any material. It is defined as the ratio of an objects mass to its volume. Because most designs are limited by either size and or weight density is an importa... Read More...
Magnetoresistive sensors can determine the change in earth's magnetic field due to the presence of a ferromagnetic object or position within the earth's magnetic field. The high bandwidth allows detection of vehicles and other fe... Read More...
What is Brinell hardness (HB)? What is Rockwell hardness (HRC)? What is Vickers hardness (VH)? How to convert from HRC and VH to HB?
The Brinell hardness will scale the hardness of materials by the penetration depth of an inden... Read More...
The hardness of plastics is most commonly measured by the Shore Durometer test or Rockwell hardness test. Both methods measure the resistance of plastics toward indentation and provide an empirical hardness value that doesn't ne... Read More...
Hardness test often are used to quantify strength and are considered to be nondestructive in most applications because the indentations are small and do not adversely affect surface quality. In the case of steel, there is a com... Read More...
Hardness covers several properties: resistance to deformation, resistance to friction and abrasion.
The well known correlation links hardness with tensile strength, while resistance to deformation is dependent on modulus of elas... Read More...
Figure 10. A portable and fast hardness gauge, for testing Aluminum, mild steel, brass and copper with thickness range of 0.025 to 1/4 inch. It is used for identifying heat-treated from non-heat-treated parts, provides correlatio... Read More...
Figure 8. Comparison of hardness scales
Figure 9. The summary table for different hardness testing methods
Related posts:Shore Hardness Test – Shore A Shore D Rockwell M
Knoop Hardness Test
Rockwell Hardne... Read More...
Mohs hardness is defined by how well a substance will resist scratching by another substance. It is rough measure of the resistance of a smooth surface to scratching or abrasion, expressed in terms of a scale devised (1812) by th... Read More...
The shore scleroscope measures hardness in terms of the elasticity of the material. A diamond-tipped hammer in a graduated glass tube is allowed to fall from a known height on the specimen to be tested, and the hardness number de... Read More...
The relative microhardness of a material is determined by the Knoop indentation test. In this test, a pyramid-shaped diamond indenter with apical angles of 130� and 172�30? (called a Knoop indenter) is pressed against a mater... Read More...
It is the standard method for measuring the hardness of metals, particularly those with extremely hard surfaces: the surface is subjected to a standard pressure for a standard length of time by means of a pyramid-shaped diamond. ... Read More...