 4142 Ground Flat Stock is pre-hardened to about 26-34 Rc (261-321 Brinell). Its machinability is about 85% compared to 1% carbon steel. It can be flame hardened to increase its toughness and wear resistance. Standard lengths are 18", 36", and 72". Practically every standard size of 4142 Ground Flat Stock manufactured in North America is listed here. Please contact us if you can't find the size you need.
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