Import Astm A500 Grade B Square Steel Pipe — Buy in Bulk from Supplier in China

ASTM A500 Grade B square steel pipe from Reliance Metal Resource Co. is a cold-formed welded carbon steel hollow section produced to American Society for Testing and Materials specifications for structural applications. The Grade B designation specifies a minimum yield strength of 46,000 psi (317 MPa) and minimum tensile strength of 58,000 psi (400 MPa), with maximum carbon content of 0.26% and manganese up to 1.35% depending on the selected wall thickness. The square profile provides uniform geometric properties about both axes, simplifying connection design and improving torsional rigidity compared to open sections.

Manufacture involves cold-forming flat-rolled steel coil into a square cross-section followed by electric resistance welding of the longitudinal seam, with external corner radii typically twice the wall thickness for sections up to 2.5 inches. Grade B permits both welded and seamless production methods, though cold-formed welded construction predominates in commercial sizes. The grade allows copper content up to 0.20% for atmospheric corrosion resistance, though this is not standard for all heats. Typical surface condition is as-formed with mill scale, though shot-blasted and primed finishes are available through secondary processing.

Structural fabricators, scaffold contractors and general construction firms source A500 Grade B square pipe for columns, bracing members, framework and temporary works. The hollow section efficiently resists buckling in compression and performs well in combined bending and torsion. Buyers should confirm with Reliance Metal Resource Co. the specific size range offered, wall thickness availability, corner radius tolerances per ASTM A500 Section 7, and whether mechanical testing certificates accompany material shipments. The listing does not state minimum order quantities, lead times or specific Incoterms.

Reliance Metal Resource Co. is located at Hi-Tech Information Square, Building C, Tianjin 300384, Nankai District, China. The company holds an imported supplier tier and harbor trust tier classification. The response rate is recorded as 0.00% with average response hours at zero, indicating no response data is currently available through this channel.

The listing describes Reliance Metal Resource Co. as offering ASTM A500 Grade B square steel pipe for construction and industrial applications, with mention of ISO and CE certifications and shipping terms including FOB and CIF. No specific year of establishment, production capacity, workforce size, revenue figures, or named client references are provided. Buyers should independently verify certification validity, scope of accreditation, and actual manufacturing location or subcontracting arrangements, as the Tianjin address may represent commercial offices rather than production facilities.