What are the main applications for this square steel hollow section?

It is widely used in construction, steel structures, road signs, steel frames, light industry, automobiles, and hydraulic pipes.

What is the material composition and strength?

Material is Alloy Steel (Q345/16Mn/St52) with a yield strength of 345MPa - 355MPa and tensile strength of 470-630MPa.

What surface treatment is applied to the steel?

The surface treatment is anti-rust oiled surface with a black finish to prevent corrosion.

Premium 400X400X12mm Square Steel Hollow Section for Global Buyers

Name: Premium 400X400X12mm Square Steel Hollow Section for Global Buyers
Brand: Qingdao Wanrunda Imp and Exp Co., Ltd.
SKU: 697861662

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

US$650.00

20-39 Tons

US$635.00

40+ Tons

Product profile

Customization

Available

After-sales Service

Provided

Warranty

Provided

Model NO.

400X400X12mm

Type

Welded

Technique

ERW

Material

Alloy Steel

Surface Treatment

Black

Usage

Construction & Decoration

Section Shape

Square

Size

400X400mm

Thickness

12mm

Length

4-12meters

Steel Grade

Q345/16mn/St52

Yield Strength

345MPa - 355MPa

Transport Package

Bulk Packing, Anti-Rust Oil Covered

Specification

400x400x12mm x 4-12meters

Trademark

Wanrunda

Origin

Tianjin

HS Code

7306610000

Production Capacity

200000mt Per Year

Key features

Customizable Dimensions: Size, thickness, length, and steel grade can be customized to meet specific project requirements.

High Strength Alloy Steel: Made from Q345/16Mn/St52 alloy steel with yield strength of 345-355MPa for durable construction.

Versatile Applications: Ideal for construction, steel structures, road signs, hydraulic pipes, and automotive industries.

Professional After-Sales Support: Comprehensive after-sales service and warranty provided to ensure customer satisfaction and product reliability.

Flexible Order Quantity: Low MOQ of 10MT allows for flexible purchasing options for various business scales.

Fast Delivery Time: Standard delivery within 15-20 days after receiving deposit, ensuring timely project completion.

Strict Quality Tolerance: Thickness and OD tolerance controlled within +/- 0.25mm for high precision and consistency.

Global Export Experience: Exported to over 10 countries including USA, Russia, and Middle East with excellent reputation.

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: ≤15hTerms 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.