high-speed steel

noun
an especially hard, heat-resistant steel for use in lathe tools and for other applications involving high friction and wear.

Origin:
1925–30

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
high-speed steel
 
n
any of various steels that retain their hardness at high temperatures and are thus suitable for making tools used on lathes and other high-speed machines

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Example sentences
There is one exception to the use of high-speed steel tools.
Drill through the outer skin of the drawer or door with a high-speed steel or cobalt drill bit.
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