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mild steel

noun
  1. low-carbon steel, containing no more than 0.25 percent carbon.
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Origin of mild steel

First recorded in 1865–70
Also called soft steel.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for mild steel

mild steel

noun
  1. any of a class of strong tough steels that contain a low quantity of carbon (0.1–0.25 per cent)
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012