... the most common one), nickel, chromium, molybdenum, vanadium, silicon, and boron. Less common alloyants include aluminum, cobalt, copper, cerium, ... steels): strength, hardness, toughness, wear resistance, hardenability, and hot hardness. The chassis without the plate after a while ... stop the engine sinks while crash to protect the driver and passenger.Tough. Using new material of alloy plastic steel ...