What is the difference between 10# steel pipe and 20MnG steel pipe?
Chemical composition.
10# steel pipe: the main components include carbon (C), silicon (Si), manganese (Mn), the content of 0.07-0.14%, 0.17-0.37%, 0.35-0.65%. In addition, also contains a small amount of sulfur (S), phosphorus (P), chromium (Cr), nickel (Ni), copper (Cu).
20MnG steel pipe: the main components are carbon (C), silicon (Si), manganese (Mn), of which the content of manganese is higher, usually in the 1.4% or so, but also contains a certain amount of alloying elements to enhance the mechanical properties of steel.
Mechanical properties.
10# steel pipe: yield strength σs ≥245MPa, tensile strength σb ≥410MPa, elongation δ5 ≥25%, section shrinkage ψ ≥5%.
20MnG Steel Pipe: Due to its high content of manganese and other alloying elements, 20MnG Steel Pipe has higher strength and hardness, good toughness and plasticity, as well as excellent welding performance.
Uses.
10# steel pipe: widely used in the manufacture of mechanical structures, such as bolts, nuts, etc., because of its moderate strength, suitable for a variety of processing requirements.
20MnG steel pipe: mainly used in the manufacture of high-strength, wear-resistant, corrosion-resistant mechanical parts and structural parts, such as engine connecting rods, mechanical parts and so on.
In summary, 10# steel pipe and 20MnG steel pipe are different in chemical composition and mechanical properties, 20MnG steel pipe has higher strength and hardness due to the addition of appropriate amount of alloying elements, suitable for the manufacture of high-strength and wear-resistant parts and structural components. While 10# steel pipe is suitable for general mechanical structure and general purpose.