Which of the following is the increasing order of cutting tool material?

Explanation:

Order of cutting speed for cutting tool material is in order of hardness.

Arranging in increasing order of cutting speed for different cutting tool materials,

• High Carbon Steel, HSS, Solid Tungsten Carbide, Ceramics & Diamond

​Few important points about different cutting materials:

• ​Since diamond is the hardest material, the cutting speed for a diamond tool is also very high.
• Being much cheaper than diamond and most economical for high-speed cutting ceramics are used widely as cutting tools.
• Solid Tungsten Carbides are a better choice than HSS for manufacturing tool materials.
• Contrary to its name High-speed steel, i.e. HSS is nowadays considered to be outdated cutting tool material.

​Additional Information

Hot hardness:

• It is the ability of the material to retain its hardness at elevated temperatures. It is to resist plastic deformation and reduce wear rate at elevated temperatures.
• This is an important property because at room temperature the hardness values of materials are not the same values that exist at the elevated temperature.
• The correct order of increasing hot hardness is HSS < carbide < Diamond.