A 4140 piston rod is a high-strength mechanical component used in hydraulic cylinders, pneumatic systems, and industrial machinery where superior toughness, fatigue resistance, and durability are required. Manufactured from AISI 4140 alloy steel, this piston rod is designed to withstand high stress, heavy loads, and continuous reciprocating motion under harsh operating conditions. With its exceptional mechanical properties and outstanding wear resistance, the 4140 piston rod is an ideal choice for heavy-duty hydraulic applications such as construction equipment, mining machinery, and industrial presses.