How long is the delivery time?

The lead time is typically 3-15 working days. We have large stock to ensure fast delivery for urgent orders.

Is third-party inspection supported?

Yes, we support third-party inspections such as ISO, SGS, and BV. We also conduct 100% internal inspection.

What are the main applications for these tubes?

They are widely used in mechanical manufacturing, steel structures, shipbuilding, bridge construction, and automobile chassis.

Carbon Steel Square Rectangular Tube Hot Dipped Galvanized Welded 40X40 50X50 20X40 Rectangular Steel Pipe

Name: Carbon Steel Square Rectangular Tube Hot Dipped Galvanized Welded 40X40 50X50 20X40 Rectangular Steel Pipe
Brand: Shanghai Changzeng Metal Co., Ltd.
SKU: 2261103565

Shanghai, ChinaShanghai Changzeng Metal Co., Ltd.

US$498.00-558.00

1 Ton

Sample price:US$458.00/ton.Request sample

Product profile

After-sales Service

Support

Warranty

2 Years

Additional Service

Cutting, Drilling

Model NO.

Q235b

Product Name

Z Channel Purlin

After-Sale Service

Solve Any Problems for Clients

Company Years

12 Years

Shipping Service

Cheaper and Realiable

Delivery Time

7 Days

Quality Control

as Request

Place of Origin

Shanghai, China

MOQ

1ton

Package

Standard Seaworth Packing

Usage

Construction Structure

Payment Term

30%Tt Advance + 70% Balance

Transport Package

1. Big Od/ Bulk Small Od: Packed by Steel Strip

Specification

GB, ASTM, AISI

Trademark

Origin

Shanghai

Production Capacity

5000 Tons/ Month, 15000 Tons/ Season

Key features

Extensive Size Range: Square and rectangular pipes from 20x20mm to 500x500mm with various thicknesses.

Multiple Material Options: Available in ASTM A36, Q235, S235JR, S355, SS400, and other standard steel grades.

Flexible Customization: Supports cutting, drilling, bending, punching, and color painting based on requirements.

Wide Application Scope: Ideal for construction structures, shipbuilding, bridges, automobile chassis, and machinery.

Strict Quality Control: 100% inspection including function and visual checks; third-party inspections (SGS, BV) supported.

Fast Delivery Capability: Lead time 3-15 working days due to large stock; fast delivery available for urgent orders.

Secure Packaging: Standard seaworthy packing using steel strips, woven cloth, or wooden pallets as requested.

Comprehensive Standards: Meets ASTM A53/A573, BS1387, GB/T3091, ISO630, JIS G3131, and other international standards.

Company profile

High Repeat Buyers ChoiceYears of Export ExperienceFast DeliveryLow MOQ

Shanghai Changzeng Metal Co., Ltd.

Shanghai, China

Business Type: Manufacturer/Factory CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 19 Years CertifiedNearest Port: Shanghai PortAverage Response Time: ≤2.93h CertifiedTerms of Payment: LC, T/T, PayPal

About Our Factory & Business Background

AddressMeilan Lake, Baoshan District, Shanghai, China

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 Quantity1 Ton

Supply Chain Partners20

Our Production Capability & Technical Expertise

Main ProductsSteel Structure, Square Tube, Galvanized Steel Sheet Coil, Cold Rolled Steel Sheet Coil, Stainless Steel Sheet, Steel Channel, Steel H Beam, Angle Steel, Seamless Pipe, Round Tube

QA/QC inspectors1 people

Inspection Type for Finished Products100% inspection(Function inspection & Visual inspection)

Inspection Method for Finished ProductsHave instructions and uniformly followed

R&D Engineers1 people

Traceability of Raw MaterialsYes

Own BrandYes

Our Industry Experience & Global Business Record

Main MarketsSouth America, Southeast Asia/ Mideast, East Asia(Japan/ South Korea)

Repeat Buyers Choice50%~80%

Number of Foreign Trading Staff4

Overseas Agent/BranchNo

New Products Launched in Last yearNo

Product Q&A

Q:What are the available sizes for the square and rectangular tubes?

Sizes range from 20x20mm to 500x500mm, with thicknesses varying from 1.0mm to 21.7mm depending on the specific dimensions.

Q:Can the tubes be customized in terms of size and processing?

Yes, we offer cutting, drilling, bending, punching, and color painting services. Lengths can be 6M, 9M, 10M, 12M, or cut to your specific demands.

Q:What materials are available for these steel pipes?

We provide various materials including ASTM 106, SS400, St37, St52, S235JR, S355TRH, Q195, Q235A-B, Q345A-E, 10#, 20#, 16Mn, ASTM A36, ASTM A500, and ASTM A53.

Q:What is the minimum order quantity (MOQ)?

The minimum order quantity is 1 ton for general customization, but standard minimum order is 3 tons.

Q:What are the payment terms?

Payment terms include T/T (30% advance + 70% balance), L/C, and PayPal.