Product

ERWRectangularSteelPipeQ355BuildingFrameHollowTube

ERWRectangularSteelPipeQ355BuildingFrameHollowTube

ꁆ ꁇ

ERW Rectangular Steel Pipe Q355 Building Frame Hollow Tube

ꄴPrevious： ERW JIS Galvanized Square And Rectangular Steel Tubes

ꄲNext： Q355D Hollow Section Pipe SHS RHS

Product Basic Information

Item	Detailed Description
Product Name	ERW Rectangular Steel Pipe Q355 Building Frame Hollow Tube
Alternatives	Q355 ERW rectangular hollow tube, Q355 building frame steel pipe, ERW hollow structural steel tube, Q355 rectangular steel section, construction frame rectangular steel pipe
Product Type	Electric Resistance Welded (ERW) Hollow Structural Section (HSS)
Main Application	Building frame construction, structural support, warehouse framework, bridge engineering, mechanical equipment frame, stadium & exhibition hall structural engineering
Brand Positioning	High-strength low-alloy structural steel pipe for heavy-duty building frame engineering

Product Standard & Material Grade Specification

Item	Specification Details
Steel Grade	Q355 (Q355B/Q355C/Q355D, upgraded from traditional Q345 grade)
Executive Standards	EN 10219, GB/T 6728, ASTM A500, JIS G 3466, BS Standard
Material Feature	Low alloy high strength carbon steel, excellent toughness, weldability and pressure resistance, stable mechanical properties for long-term structural load-bearing
Grade Advantage	Higher yield strength than Q235 and Q345 steel, stronger anti-deformation and anti-seismic performance, suitable for high-rise and heavy-load building frames

Dimensional Parameter Range (Customizable)

Parameter Item	Available Size Range
Section Size (Width × Height)	10×15mm - 400×300mm (custom special sizes acceptable)
Wall Thickness	0.8mm - 16.0mm (heavy thickness for heavy-duty construction frames)
Standard Length	6m / 12m (custom length: 3m-14m available)
Dimensional Tolerance	±0.5mm (strict tolerance for precise building frame assembly)
Section Shape	Strict rectangular hollow section, flat and smooth surface, uniform wall thickness

Mechanical & Physical Performance

Performance Index	Test Standard Value
Yield Strength	≥ 355MPa
Tensile Strength	470-630MPa
Elongation Rate	≥ 21%
Impact Toughness	Qualified at normal / low temperature (adapt to various construction environments)
Welding Performance	Excellent weldability, no crack after welding, stable structural integrity

Production Technology & Process Flow

Process Item	Detailed Process Description
Forming Technology	ERW (Electric Resistance Welding) cold forming technology, high-frequency welding molding
Weld Feature	Integrated seamless weld, high welding density, no air holes, strong pressure resistance, not easy to crack
Production Process	Raw material inspection → cold rolling forming → high-frequency ERW welding → weld polishing → fixed-length cutting → straightening → surface treatment → quality testing → packaging
Processing Advantage	High dimensional accuracy, smooth inner and outer wall, uniform stress distribution, perfect for building frame load-bearing structure

Surface Treatment & Packaging

Item	Details
Surface Treatment Options	Black pickled finish, hot-dip galvanized, cold galvanized, painted, anti-rust oil coating
Surface Quality	No rust, no burr, no scratch, flat and tidy surface
Packaging Method	Standard seaworthy packing: steel bundle packing with steel strips, waterproof plastic film wrapped, anti-collision protection
Shipping Adaptability	Suitable for long-distance sea transportation, moisture-proof, anti-rust, anti-damage

Products Description

Advantage Dimension	Specific Advantages
Structural Performance	Q355 high-strength material, superior load-bearing capacity, anti-seismic and anti-deformation, durable for decades in building frame structures
Cost Performance	ERW mature process, lower cost than seamless pipe, higher strength than ordinary Q235/Q345 pipe, optimal choice for engineering cost control
Engineering Adaptability	Light weight but high rigidity, convenient for cutting, welding and installation, greatly improving construction efficiency
Quality Stability	100% factory inspection, compliant with international standards, stable batch quality, zero defect rate for engineering projects

Application

Application Field	Specific Usage Scenarios
Building Construction	High-rise building frame, factory warehouse steel structure, residential building load-bearing support, mezzanine floor frame
Public Engineering	Stadiums, exhibition halls, airport terminals, subway auxiliary structures, bridge support frames
Industrial Manufacturing	Mechanical equipment frame, conveyor support, engineering machinery base, industrial workshop steel truss
Other Projects	Greenhouse steel structure, fence frame, offshore platform auxiliary structure, municipal engineering support components

Factory Supply & Service Terms

Service Item	Detailed Terms
Supply Capacity	Annual output 150,000 tons, sufficient stock, fast bulk delivery
Custom Service	Support OEM/ODM, custom size, surface treatment, logo printing as customer requirements
MOQ	1 Ton for conventional sizes, small batch trial order acceptable
Delivery Time	Stock goods: 3-7 days; Custom goods: 10-15 working days
Certification	ISO9001, CE, SGS, BV inspection certification, full test reports provided
After-sales Service	24-hour online service, quality problem free replacement, professional engineering technical support

Product show

Product Display

Home ꄲ Product

Copyright: Shandong Hongqixiang Metal Products Co., Ltd.

Whatsapp: 8617862569838

Whatsapp: 8615174002811

Email: yara@hqxsteelpipe.com

Add: Chuangye Building, Liaocheng Economic Development Zone, Shandong Province

Hotline:

Phone:

+8617862569838

Whatsapp