What is the standard length of the tubes?

The normal length is 6 meters, but 4.5 meters and other fixed lengths are accepted.

What is the surface treatment?

The surface is treated with anti-rust oil, black anneal, or hot rolled finish.

Premium Q355b Square Steel Hollow Tube for Structural Applications

Name: Premium Q355b Square Steel Hollow Tube for Structural Applications
Brand: Qingdao Wanrunda Imp and Exp Co., Ltd.
SKU: 1966071032

Shandong, ChinaQingdao Wanrunda Imp and Exp Co., Ltd.

US$750.00-800.00

10 Tons

Product profile

Customization

Available

After-sales Service

Provide

Warranty

Provide

Type

Welded

Technique

Hot Rolled

Material

Carbon Steel

Surface Treatment

Black

Usage

Construction & Decoration

Section Shape

Square

Dimension(mm)

160X160

Steel Grade

S235/S355/16mn/ASTM A500/Ss400/A53/A36

Wall Thickness(mm)

7.5mm

Length

4500mm(Normal 6 Meters, Accept Fixed Lenght)

W.T Tolerance(mm)

+/- 0.25mm

Surface

Hot Rolled/Black Anneal/Anti Rust Oil

Transport Package

Anti-Rust Oiled;Be Packed in Bundle by Steel Strip

Specification

160x160x7.5mm

Trademark

Wanrunda

Origin

Qingdao and Tianjin

HS Code

7306610000

Production Capacity

2000mt Per Year

Key features

Customizable Dimensions: Accept fixed lengths and custom dimensions according to customer drawings.

Wide Material Selection: Available in Q195, Q235, S355, ASTM A500, and other steel grades.

Competitive Factory Price: Direct manufacture reduces intermediate links for cost-effective pricing.

Flexible Order Quantity: Small and flexible order requirements based on customer situations.

Hot Rolled Technique: Manufactured using hot rolled technique for structural strength.

Anti-Rust Surface Treatment: Surface treated with black anneal or anti-rust oil for durability.

Global Export Experience: Exported to Australia, India, Turkey, Russia, and many other regions.

Company profile

Qingdao Wanrunda Imp and Exp Co., Ltd.

Shandong, China

Business Type: Manufacturer/Factory, Trading CompanyExport Year: 2008-09-18Nearest Port: Qingdao Port, Tianjin port, Shanghai PortAverage Response Time: ≤11.75hTerms of Payment: LC, T/T, Western Union, etc.International Commercial Terms(Incoterms): FOB, CFR, CIF

AI-Powered supplier vetting

SummaryQingdao Wanrunda Imp and Exp Co., Ltd. is identified as both a trading company and manufacturer/factory based in Shandong, China. It reports five production lines and listed annual capacities totaling 1,600 tons across steel products, including steel fences, trellises, plates, coils, pipes, and sections. The supplier states that 90% of sales are exports, has held exporting activity since 2008, and possesses self-operated import and export rights. ISO 9000 and ISO 9001 management-system certifications are reported. Its capabilities include punching, bending, welding, galvanizing, electrostatic spraying, powder coating, painting, and oiling, with manufacturing to ASTM, JIS, DIN, and API standards. Evidence is insufficient to assess after-sales service execution, financial credibility, innovation strength, and customer cases.

Supplier typeThe supplier is explicitly classified as both a trading company and manufacturer/factory. It is a China-based limited company in Shandong and reports self-operated import and export rights, with exporting activity beginning in 2008.

CertificationsThe supplier reports holding ISO 9000 and ISO 9001 supplier management-system certifications. These stated certifications provide explicit evidence of formal quality-management credentials.

Production capacityThe supplier reports five production lines and stated annual capacities of 200 tons for steel fence and guardrail, 300 tons for angle-steel and grape trellis, 100 tons for self-nail steel plates and hanger straps, and 500 tons each for steel angles/flat/coil/plate/stainless steel and steel pipe/hollow section/alloy steel. These figures explicitly demonstrate multi-product manufacturing capacity.

Customization capabilityThe supplier states that it has its own processing equipment and can perform punching, bending, welding, galvanizing, electrostatic spraying, powder coating, painting, and oiling. It also states that products can be manufactured according to ASTM, JIS, DIN, and API standards, supporting customized processing and specification compliance.