Phosphorus: An increase in the harmful element content of phosphorus leads to a decrease in the strength, hardness, plasticity, and durability of greenhouse pipes.
Silicon: When its content is less than 1%, it can enhance the strength of greenhouse pipes without significantly affecting plasticity and durability.
Carbon is a more significant element in determining the functionality of greenhouse tubes. As the carbon content increases, the strength and hardness of the spiral tubes improve, while their ductility and toughness decrease.
4. Oxygen: Oxygen is a harmful element in steel that can decrease the mechanical properties of spiral pipes, particularly its toughness. The low melting point of oxides also worsens the weldability of greenhouse pipes.
5. Sulfur: Sulfur is a highly harmful element. The low melting point of sulfides in greenhouse pipes can lead to thermal cracks during welding, resulting in a thermal brittleness phenomenon. Sulfur reduces the weldability, impact resistance, fatigue resistance, and corrosion resistance of steel.
6. Manganese: Manganese reduces the thermal brittleness caused by sulfur and oxygen, improving the thermal processing function of greenhouse pipes.
7. Nitrogen: The effect of nitrogen on the properties of helical tubes is similar to that of carbon and phosphorus, as it enhances the strength of the helical tube, but it significantly reduces its plasticity, especially its toughness.
