What tests will be done before delivery?

Yield & tensile test, elongation test, -20temprature Charpy impact test and full dimension tolerance inspection.

Can we do punching and bending processing?

CNC punching, arch bending and special shape fabrication can be processed as construction drawings.

Are the certificates valid for EU engineering projects?

Formal MTC test reports in line with EN standard can be provided for third-party audit and project filing.

What is your minimum order quantity?

Flexible MOQ, support sample testing order and full container bulk orders for construction contractors.

How to avoid tube deformation during transportation?

Tightly bundled with high-tensile steel strips, reinforced with steel frame for large size sections to prevent bending and collision damage.

Prime 80X80 Mild Steel Seamless Square Tube for Structural Frame Fabrication

Name: Prime 80X80 Mild Steel Seamless Square Tube for Structural Frame Fabrication
Brand: Tianjin Zengze Steel Trading Co., Ltd.
SKU: 1941771452

Tianjin, ChinaTianjin Zengze Steel Trading Co., Ltd.

US$800.00

1 Ton

Sample price:US$10.00/piece.Request sample

Product profile

Customization

Available

After-sales Service

Quality Objection Within 10 Days Since Receiving

Warranty

6 Months

Model NO.

ZZ-SP-065

Type

Welded

Technique

ERW

Material

Alloy Steel, Carbon Steel, Stainless Steel

Surface Treatment

Black

Usage

Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Oil/Gas Drilling, Food/Beverage/Dairy Products, Machinery Industry, Chemical Industry, Mining, Construction & Decoration, Special Purpose

Section Shape

Square

Size

10-600mm

Thickness

0.5-16mm

Length

6m,9m,12m or as Required

Surface

Black Galvanized

Place of Origin

Tianjin, Hebei, Shandong

Loading Port

Tianjin, Qingdao, Shanghai

Steel Material

Alloy Steel, Carbon Steel, Stainless Steel

Steel Grade

Q195,Q235,Q345,304,316

Stock

Normal Size in Stock

Stock Quantity

More Than 5000tons

Packing

Standard Exporting Package

Delivery

Within 7 Days for Normal Size

Mtc

Along with Shipping Docs.

Shape

Square, Rectangle, Round

Payment

T/T L/C

Transport Package

Standard Exporting Package

Specification

Standrd size

Trademark

Zengze

Origin

Tianjin, Hebei

HS Code

7304900000

Production Capacity

10000 Tons Per Month

Key features

Square Tube: Prime grade 80X80 mild steel seamless square tube, manufactured via professional seamless piercing process, zero weld seam for high structural integrity and stability.

Square Tube: Available in mainstream Q235B and S235JR grades, perfectly suited for global structural frame fabrication and general engineering construction.

Square Tube: Precise dimensional tolerance, uniform wall thickness and smooth inner & outer surface, greatly improving subsequent welding, cutting and galvanizing quality.

Square Tube: Excellent overall mechanical performance with stable yield strength and tensile strength, reliable for structural frame load-bearing applications.

Square Tube: Superior processability, easy for cutting, bending, drilling and welding, highly adaptable for custom frame fabrication and on-site assembly.

Square Tube: Original hot rolled black mill finish, compatible with shot blasting, anti-rust painting and hot-dip galvanizing for long-term anti-corrosion protection.

Square Tube: Standard 80*80 popular specification with complete wall thickness options, sufficient stock to support frame structure batch production.

Square Tube: Support custom fixed-length cutting service, effectively reduce material waste and secondary processing workload for structural fabricators.

Square Tube: Strict factory batch inspection on chemical composition, mechanical properties and dimensional accuracy to ensure consistent frame structural safety.

Square Tube: Complete MTC material test reports provided, support SGS, BV third-party inspection for export project acceptance and customs clearance.

Company profile

Importers and ExportersHigh Repeat Buyers ChoiceYears of Export ExperienceFast Delivery

Tianjin Zengze Steel Trading Co., Ltd.

Tianjin, China

CertifiedBusiness Type: Trading Company CertifiedCustomization Options: Customization from Samples CertifiedExport Year: 17 Years CertifiedNearest Port: Tianjin PortAverage Response Time: ≤0.72h CertifiedTerms of Payment: LC, T/T, D/P, etc.

About Our Factory & Business Background

AddressBeichen District Beicang Way Names Material, Tianjin, China

Plant Area50 square meters

Number of Employees2

Registered Capital5,000,000 RMB

International Commercial Terms(Incoterms)FOB, CIF, CFR, EXW

Average Lead TimePeak Season Lead Time: within 15 workdays Off Season Lead Time: within 15 workdays

Minimum Order Quantity100 Kg

Supply Chain Partners10

Our Production Capability & Technical Expertise

Main ProductsSteel And Laser Cladding Machine

R&D Engineers1 people

Our Industry Experience & Global Business Record

Year of Establishment2007-12-11

Main MarketsEurope, Domestic, Asia

Repeat Buyers Choice80%~100%

Number of Foreign Trading Staff1

Overseas Agent/BranchNo

New Products Launched in Last yearNo

Our Certifications, Standards & Industry Recognition

Cooperated with Fortune 500No

Product Q&A

Q:What is the difference between S275J2H and S275JR?

S275J2H has J2 low temperature impact property at -20temprature, suitable for cold area construction; S275JR only has room temperature impact resistance.

Q:Which standard does this square rectangular tube follow?

Strictly produced and tested according to EN 10219-1 European cold formed structural hollow section standard.

Q:Can these tubes be galvanized for outdoor use?

Yes, we provide hot-dip galvanizing, shot blasting and anti-rust painting service for corrosion protection.

Q:Do you support custom length and cutting?

6m/12m standard length, arbitrary fixed-length cutting, pipe end trimming and deburring are all available.

Q:Is the material suitable for building load-bearing framework?

S275J2H is designated structural grade with stable mechanical performance, widely approved for construction load-bearing system.