Which of the following statement is wrong?

• The diamond is the hardest tool material and can run at cutting speeds about 50 times that of high speed steel tool.
• The ceramic tools can be used at cutting speeds 40 times that of high speed steel tools.
• The cemented carbide tools can be used at cutting speeds 10 times that of high speed steel tools.
• The ceramic tools can withstand temperature upto 600°C only.