AISI 4140 (Cr–Mo) Alloy steel High strength, toughness, fatigue + wear resistance Shafts, spindles, crankshafts, heavy-duty parts Dynamic loading + heat-treated parts 304 Stainless (18/8) Austenitic ...
In its purest form, iron is neither exceptionally strong nor hard - in fact, a block of pure iron could be cut with a knife. The addition of carbon and the removal of oxygen are what give iron-based ...