ST52 steel pipe is a low-alloy high-strength structural steel pipe with good strength and toughness. Its chemical composition mainly includes carbon (C), silicon (Si), manganese (Mn), phosphorus (P), sulfur (S) and other elements. Among them, the carbon content is controlled at a low level to improve the welding performance and toughness of the steel; the addition of silicon and manganese helps to improve the strength and hardness of the steel. As harmful elements, phosphorus and sulfur are strictly limited to a low level to ensure the excellent performance of the steel.
In terms of mechanical properties, ST52 performs well. Its tensile strength ranges from 500-650MPa, and the yield strength varies according to different wall thicknesses. For example, when the wall thickness is ≤16mm, the yield strength is ≥355MPa; when the wall thickness is 16-40mm, the yield strength is ≥345MPa; when the wall thickness is 40-65mm, the yield strength is ≥335MPa. These excellent mechanical properties make ST52 perform well when subjected to high loads.
What is the equivalent material of ST52 steel pipe?
Standard Type
DIN/EN
GB
International general brand
Basic grade
ST52(旧DIN 17100)
Q355B
S355J2
High toughness model
ST52-3N
Q355D
S355J2G3
Seamless pipe dedicated
ST52.4
Q355B
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What are the applications of ST52 structural pipes?
Structural engineering: bridge supports, high-rise building steel structures;
Industrial pipelines: fire protection systems (such as ASTM A795 pipe alternatives), oil and gas pipelines;
Machinery manufacturing: heavy machinery pressure-bearing parts, automobile frames (Q/CAM-23.5St52);
Special fields: offshore platform components, pressure vessels
