hardness number sentence in Hindi
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- The tabulated Janka Hardness numbers are an average.
- Vickers and Rockwell hardness numbers exhibit qualitatively different behaviour when used to describe some materials and phenomena.
- This numbering system is not standardized reeds with the same hardness number often vary in hardness across manufacturers and models.
- In all these, a process is defined for loading the indenter, measuring the resulting indentation and calculating a hardness number.
- In microindentation testing, the hardness number is based on measurements made of the indent formed in the surface of the test specimen.
- The hardness number is based on the applied force divided by the surface area of the indent itself, giving hardness units in kgf / mm?
- The hardness number is determined by the load over the surface area of the indentation and not the area normal to the force, and is therefore not pressure.
- To calculate Vickers hardness number using SI units one needs to convert the force applied from newtons to kilogram-force by dividing by 9.806 65 ( standard gravity ).
- Furthermore, experimental results obtained using these measurement methods has shown that the hardness number can be used to predict the stress required to permanently deform steel, a characteristic that fits in well with our idea of resistance to permanent deformation.
- In 2004 RADO created a'high-tech diamond', by the transformation of carbon into a nanocrystalline diamond with a Vickers hardness number of 10, 000, thus naming the watch the V10K . It is the hardest watch on Earth, certified by the Guinness Book of World Records.
- To convert the Vickers hardness number to SI units the hardness number in kilograms-force per square millimeter ( kgf / mm?) has to be multiplied with the standard gravity ( 9.806 65 ) to get the hardness in MPa ( N / mm?) and furthermore divided by 1000 to get the hardness in GPa.
- To convert the Vickers hardness number to SI units the hardness number in kilograms-force per square millimeter ( kgf / mm?) has to be multiplied with the standard gravity ( 9.806 65 ) to get the hardness in MPa ( N / mm?) and furthermore divided by 1000 to get the hardness in GPa.
- A common error is that the above formula to calculate the HV number does not result in a number with the unit Newton per square millimeter ( N / mm2 ), but results directly in the Vickers hardness number ( usually given without units ), which is in fact kilograms-force per square millimeter ( kgf / mm?).
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