1, tungsten : tungsten is a very hard metal, its hardness can reach grade 5, widely used in the manufacture of high-speed cutting tools, drills, abrasives
2, titanium : titanium hardness of about 4-4.5, widely used in the aerospace field
3, tritium : Tritium has a hardness of about 3-3.5 and is widely used in nuclear reactors
4, osmium : osmium has a hardness of about 4-4.5 and is widely used in jewelry manufacturing
5, iron and steel : the hardness of iron and steel is about 2-2.5 grade, widely used in construction, transportation and other fields
6, zirconium and chromium : zirconium and chromium have a hardness of about 4-4.5 and are widely used in aerospace and automobile manufacturing respectively
7, vanadium : vanadium hardness of about 3-3.5 grade, widely used in iron and steel manufacturing
8, tantalum : tantalum has a hardness of about 4-4.5 and is widely used in the aerospace field
Hardness test method
There are a variety of testing methods for metal hardness, including:
scratch hardness : Evaluate hardness by comparing scratch lengths of different materials.
indentation hardness : including Brinell hardness (HB), Rockwell hardness (HRC), Vickers hardness (HV), etc., by measuring the size of the indentation to assess the hardness.
rebound hardness : Evaluate hardness by measuring the height of the rebound of the hammer
Each of these methods has advantages and disadvantages and is suitable for different materials and application scenarios.
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