▁to ▁excess ▁v ibration ▁and ▁noise ▁in ▁the ▁form ▁of ▁ring ing ▁or ▁s que aling . ▁ ▁Imp act ▁and ▁wear ▁resistance ▁ ▁Most ▁ste els ▁offer ▁a ▁good ▁balance ▁of ▁strength ▁and ▁du ct ility , ▁which ▁makes ▁them ▁extremely ▁t ough . ▁This ▁allows ▁them ▁to ▁with stand ▁significant ▁stress ▁and ▁stra in ▁without ▁f ract uring . ▁Ste el ▁can ▁also ▁be ▁fairly ▁wear - res istant . ▁Al loy ▁add itions ▁can ▁increase ▁both ▁impact ▁and ▁wear ▁resistance . ▁ ▁Ste el ▁casting ▁allo ys ▁ ▁Al loy ▁steel ▁cast ings ▁are ▁broken ▁down ▁into ▁two ▁categories : ▁low - al loy ▁ste els ▁and ▁high - al loy ▁ste els . ▁Low - al loy ▁ste els ▁contain ▁less ▁than ▁ 8 % ▁al loy ing ▁content ▁and ▁high - al loy ▁ste els ▁have ▁ 8 % ▁or ▁more . ▁ ▁This ▁is ▁a ▁table ▁of ▁some ▁steel ▁casting ▁allo ys : ▁ ▁References ▁ ▁Notes ▁ ▁Bibli ography ▁. ▁ ▁Category : Cast ing ▁( man ufact uring ) ▁Category : Ste el <0x0A> </s> ▁Sir ▁Harry ▁Henry ▁O gn all , ▁ ▁( born ▁ 9 ▁January ▁ 1 9 3 4 ) ▁is ▁an ▁English ▁former ▁High ▁Court ▁justice , ▁bar r ister ▁and ▁author . ▁ ▁Family ▁and ▁early ▁life ▁ ▁O gn all ▁was ▁born ▁in ▁S alf ord ▁into ▁a ▁middle - class ▁Jewish ▁family , ▁and ▁grew ▁up ▁in ▁Le eds . ▁O gn all ' s ▁father ▁was