What payment terms do you accept?

We accept various payment methods including LC, T/T, D/P, PayPal, Western Union, and small-amount payments. International commercial terms include FOB, CIF, CFR, and EXW.

What are the typical applications for these square tubes?

They are widely used in construction frameworks, structural supports, fencing systems, agricultural greenhouses, solar mounting structures, machinery frames, and infrastructure projects like bus shelters and traffic barriers.

High-Quality Galvanized Square Tube ASTM A500 Q355b 20X20mm

Name: High-Quality Galvanized Square Tube ASTM A500 Q355b 20X20mm
Brand: Shandong Kanghong Manufacturing Co., Limited
SKU: 2150954122

Shandong, ChinaShandong Kanghong Manufacturing Co., Limited

US$500.00-706.00

5 Tons

Product profile

Customization

Available

Type

Welded

Technique

ERW

Model NO.

Q235B Q355B ASTM A500

Material

Carbon Steel

Surface Treatment

Hot DIP Galvanized

Usage

Pipeline Transport, Boiler Pipe, Hydraulic/Automobile Pipe, Food/Beverage/Dairy Products, Machinery Industry, Construction & Decoration, Special Purpose

Section Shape

Square

Standard

ASTM, GB, JIS, En

Grade

Q235B, Q355b, ASTM A500

Outer Dimension

20X20mm - 400X400mm

Wall Thickness

1.0mm - 12.0mm

Length

6m, 12m, as Customer's Request

Zinc Coating Weight

≥80G/M²

Zinc Coating Thickness

≥45μm

Yield Strength

≥235MPa

Tensile Strength

Tensile Strength 370-500MPa

Elongation

≥26%

Processing Service

Cutting, Drilling, Bending

Size Tolerance

±0.5mm

MOQ

5 Tons

Delivery Time

7-15 Days

Certification

ISO9001, SGS, BV

Transport Package

Packed in Bundles

Trademark

KANGHONG

Origin

Shandong, China

Production Capacity

500000 Ton

Key features

Wide Size Range: Outer dimensions from 15x15mm to 600x600mm with wall thickness up to 30mm available.

Multi-Standard Compliance: Strictly complies with ASTM A500, EN 10219, JIS G3466, AS/NZS 1163, and GB/T 6728.

Customization Options: Offers custom sizes, lengths, and processing services like cutting, drilling, and bending.

High-Quality Material: Manufactured from high-grade carbon steel ensuring excellent weldability and structural integrity.

Certified Quality: ISO 9001 certified with SGS, BV inspections and Mill Test Certificates provided.

Versatile Applications: Ideal for construction, solar mounting, fencing, agriculture, and industrial machinery frames.

Company profile

Importers and ExportersFast DeliveryQuality AssuranceProduction Process Visualization

Shandong Kanghong Manufacturing Co., Limited

Shandong, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: Foreign trade business has just begun CertifiedNearest Port: TianjinAverage Response Time: ≤5.04h

AI-Powered supplier vetting

SummaryThe supplier is explicitly identified as a professional technical supplier specializing in stainless steel, carbon steel, galvanized steel, metal processing, and related products. It provides 3D software design and multiple forms of customization, including sample-based, design-based, full, minor, and flexible customization. Production is supported by factories with complete facilities, while stated quality controls include batch testing, quality assurance, and raw-material traceability. However, finished products are also described as being checked by packing staff, and no written corrective-action or complaint-handling procedures are available. The supplier states that it has exported to more than 50 countries, but another slice says foreign trade has just begun, creating inconsistency in export-history evidence. No certification information or sufficient evidence of financial credibility is provided. SDK availability is explicitly absent.

Supplier typeThe supplier is explicitly described as a professional technical supplier and as a manufacturer and seller of stainless steel, carbon steel, galvanized steel, metal products, mechanical parts, and related materials. Its registered business scope also includes metal cutting processing and import/export activities, supporting classification as a technical metal-product supplier.

After-Sales capabilityThe supplier states that it provides after-sales support and timely after-sales service through its international sales team, and presents customer-oriented service as a business principle. However, it also reports no written procedures or records for handling customer complaints or corrective and preventive actions, so the formal robustness of after-sales management is not demonstrated.

R&D capabilityThe supplier is identified as having professional technical R&D capability and offers 3D software design services with multiple customization modes. However, it explicitly has no available SDK, so the evidence supports product and design development capability but not software-development integration capability.

Production capacityThe supplier states that its production factories are located in other cities with complete supporting facilities and that it specializes in producing steel coils, sheets, pipes, mechanical parts, and related products. Quality assurance, batch testing, and raw-material traceability are also stated, although one slice says finished products are checked by packing staff, indicating that the detailed final-inspection structure is not fully clear.

Customization capabilityThe supplier explicitly offers customization from samples, customization from customer designs, full customization, minor customization, and flexible customization. Its sales team also states that it supports order customization, providing direct evidence of broad customization capability.

Product Q&A

Q:What are the available outer dimensions and wall thicknesses?

Outer dimensions range from 15x15mm to 600x600mm. Wall thicknesses are available from 0.6mm to 30mm, with standard lengths of 5.8m, 6.0m, 11.8m, or 12.0m, or custom cut-to-length.

Q:What certifications do your galvanized square tubes have?

Our products comply with ASTM A500, EN 10219, JIS G3466, AS/NZS 1163, and GB/T 6728. We are ISO 9001 certified and provide Mill Test Certificates (MTC) along with third-party inspection reports from SGS or BV.

Q:What is the Minimum Order Quantity (MOQ)?

The Minimum Order Quantity is 5 tons for standard orders. However, please note that the company profile lists a general MOQ of 27 tons for certain transaction types.

Q:Can you provide custom sizes and processing services?

Yes, we offer full customization including custom sizes, lengths, and grades. We also provide processing services such as cutting, drilling, bending, punching, and welding to meet specific fabrication requirements.

Q:What is the delivery time for orders?

The standard delivery time is 7-15 days. During peak seasons, the lead time may extend to one month, while off-season lead times are within 15 workdays.