Alloy Steel 4140
Shop Alloy Steel 4140 Bar Stock with Xometry Supplies. Through a strategic partnership with leading metals service center, Fast Metals, we are now able to provide standard sizes of 4140 Alloy Steel in Flat & Round Bar. Alloy Steel 4140 has excellent abrasion resistance and fatigue strength when heat treated. When Alloy Steel 4140 is hardened to its most workable hardness of Rockwell 28/32, it exhibits an excellent ratio of strength to ductility or toughness.