I am looking to fabricate my own impact rock crusher. Any advice on metals to be used for it's construction? A 36, 4140, 1045, Mangalloy are what I currently use on the impact crusher. Anything newer or more abrasive/impact resistant that I could use? Thank you for your time. :)
You could try some tool steels, S7 can be made hard and is shock resistant. A2, O1, M2, D2...whatever you are willing to pay for. There are some out-of-this-world (price wise) steels like REX 45 or REX 67, but they are tough and can be hardened up to 67-68 Rc. 4140 is a bad idea, it is pre-hard....not hard enough for crushing rocks. 1045 might be OK if you harden it, but unless tempered correctly it'll be very brittle.
