An ASTM A105 Control Valve is a valve made from ASTM A105 steel, which is a carbon steel forging specification primarily used for forged piping components. This type of steel is characterized by its low carbon content and includes manganese and silicon, making it similar to AISI 1330 but with lower manganese levels. ASTM A105 steel is known for its good mechanical properties and is commonly used in various industrial applications for valves due to its durability and strength.