scratch hardness; indentation hardness, and; rebound, or dynamic, hardness. The hardness of a material is a poorly defined term which has 

Properties of Steel: Steel Grading, Hardness, Yield Strength, and Alloys. In , the world produced 1878 million tons of steel, dwarfing the production of all other metals.Aluminum is a distant second at 65.3 million tons.Steel production is an essential part of the global economy because steel is a key material for dozens of industries, including construction, automotive and transport

Hardness is the ability of a material to resist deformation, which is determined by a standard test where the surface resistance to indentation is measured. The most commonly used hardness tests are defined by the shape or type of indent, the size, and the amount of load applied. There are three main types of hardness measurements: scratch

Hardness of Gold ; Aluminium, 16 ; Copper, 35 ; Gold, 25 ; Iridium, 200.

In materials science, hardness is the ability to withstand surface indentation ( localized plastic deformation) and scratching. Hardness is probably the most poorly defined material property because it may indicate resistance to scratching, resistance to abrasion, resistance to indentation or even resistance to shaping or localized plastic

Typical Brinell Hardness Numbers for Metals ; Soft brass, 60 ; Mild steel, 130 ; Annealed chissel steel, 235 ; White cast iron, 415.

AND THEIR COMMON USES BY HUMANS). Alkaline Earth Metal. Basic Metal. Transition Metal. Metalloid. Alloy. Radioactive! Mohs Hardness. Batteries.

Reference Charts & Materials · Home » Learning Center » Gemology » Reference Charts & Materials » The Mohs Hardness 

There are three primary procedures for determining a material's hardness: scratch hardness testing, the Leeb rebound hardness test, and indentation hardness testing. Scratch hardness testing The Mohs scale of hardness can be used to determine the hardness of a material by comparing it to a list of standard materials with known hardness.

Hardness of a material correlates to its elastic modulus and its tensile strength, although the relationship is not always direct and depends on the test involved. Hardness of metals is usually done using an indenter, with a "hardness number" being related to the depth of the indentation. Ceramics and other very hard

Rockwell Testing uses Rockwell Scale for hardness such as A, B & C. B Scale means the indentor used is a Ball while in Scale A & C diamond indentor is used. If you see a hardness value reported as 60 HRB, it’s, means the material has a Rockwell hardness of 60 on the B scale, similarly, 60 HRC means the material has a Rockwell hardness of 60