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JIS G 3101 SS400 HOLLOW STRUCTURAL SECTION
SS400 is a general-purpose carbon structural steel under the JIS G 3101 standard, with a core advantage of 400 MPa tensile strength, good weldability/ machinability, and low cost. It is widely used in non-critical structures such as buildings, machinery, and bridges, and is the global mainstream equivalent grade to Q235B, S235JR, and A36.
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ASTM A500 GR.B HOLLOW STRUCTURAL SECTION
ASTM A500 GR.B is the most commonly used cold-formed welded structural steel pipe in North America, with moderate strength, good weldability/formability, and high cost performance, widely used in construction, bridges, and mechanical structures.
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ASTM A1085 Gr.A HOLLOW STRUCTURAL SECTION
ASTM A1085 is a standard specifically for cold-formed welded carbon steel hollow structural sections (HSS), with only a single unified steel grade (Grade A). Its core features are a controlled yield strength range of 345–485 MPa, clear impact toughness requirements, and strict dimensional tolerances, designed specifically for seismic, bridge, and other dynamically loaded structures.
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