A track pin (80, 180) for a track chain assembly, the track pin (80, 180) comprising: a body (120, 220), the body (120, 220) being made from a steel alloy, the steel alloy having a composition comprising iron, a nitride-forming element, and silicon; wherein the body (120, 220) includes an external "white layer" nitrided surface (125, 225), wherein the composition of the steel alloy comprises: between 0.26 percent and 0.37 percent by weight of carbon, between 0.5 percent and 1.0 percent by weight of manganese, between 1.0 percent and 3.0 percent by weight of silicon, between 1.5 percent and 2.5 percent by weight of chromium, between 0.3 percent and 1.0 percent by weight of molybdenum, between 0.05 percent and 0.2 percent by weight of vanadium, between 0.03 percent and 0.1 percent by weight of titanium, between 0.01 percent and 0.03 percent by weight of aluminum, less than 0.025 percent by weight of phosphorous, less than 0.025 percent by weight of sulfur, between 0.005 percent and 0.013 percent by weight of nitrogen, and iron in a balance amount, wherein the balance amount of iron can include residual amounts of elements, such as impurities, which can be present in small amounts within commercially recognized allowable amounts. a body (120, 220), the body (120, 220) being made from a steel alloy, the steel alloy having a composition comprising iron, a nitride-forming element, and silicon; wherein the body (120, 220) includes an external "white layer" nitrided surface (125, 225), wherein the composition of the steel alloy comprises: between 0.26 percent and 0.37 percent by weight of carbon, between 0.5 percent and 1.0 percent by weight of manganese, between 1.0 percent and 3.0 percent by weight of silicon, between 1.5 percent and 2.5 percent by weight of chromium, between 0.3 percent and 1.0 percent by weight of molybdenum, between 0.05 percent and 0.2 percent by weight of vanadium, between 0.03 percent and 0.1 percent by weight of titanium, between 0.01 percent and 0.03 percent by weight of aluminum, less than 0.025 percent by weight of phosphorous, less than 0.025 percent by weight of sulfur, between 0.005 percent and 0.013 percent by weight of nitrogen, and iron in a balance amount, wherein the balance amount of iron can include residual amounts of elements, such as impurities, which can be present in small amounts within commercially recognized allowable amounts. between 0.26 percent and 0.37 percent by weight of carbon, between 0.5 percent and 1.0 percent by weight of manganese, between 1.0 percent and 3.0 percent by weight of silicon, between 1.5 percent and 2.5 percent by weight of chromium, between 0.3 percent and 1.0 percent by weight of molybdenum, between 0.05 percent and 0.2 percent by weight of vanadium, between 0.03 percent and 0.1 percent by weight of titanium, between 0.01 percent and 0.03 percent by weight of aluminum, less than 0.025 percent by weight of phosphorous, less than 0.025 percent by weight of sulfur, between 0.005 percent and 0.013 percent by weight of nitrogen, and iron in a balance amount, wherein the balance amount of iron can include residual amounts of elements, such as impurities, which can be present in small amounts within commercially recognized allowable amounts.