What certifications are provided with the products?

Products are manufactured under ISO 9001 certified systems. We also provide Mill Test Certificates (MTC) compliant with EN 10204 3.1 or 3.2, and can arrange third-party inspections by SGS, BV, or Intertek.

What are the common applications for these square tubes?

Common applications include structural frames, outdoor fencing, solar mounting structures, agricultural greenhouses, machinery frames, and construction scaffolding.

Premium Galvanized Square Tube ASTM Q235B 20X20mm Dimensions

Name: Premium Galvanized Square Tube ASTM Q235B 20X20mm Dimensions
Brand: Shandong Kanghong Manufacturing Co., Limited
SKU: 2154291212

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 Customization: Outer dimensions 15x15mm to 600x600mm with custom cut-to-length services available.

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

Versatile Processing Services: Offers cutting, drilling, bending, punching, and welding to meet specific fabrication needs.

Certified Quality Assurance: ISO 9001 certified with third-party inspections by SGS, BV, and Intertek available.

High Strength Material: Manufactured from high-grade carbon steel with tensile strength up to 550 MPa.

Broad Application Scope: Ideal for construction, solar mounting, fencing, greenhouses, 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: ≤7.74h

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 range from 0.6mm to 30mm. Custom sizes and cut-to-length services are also available upon request.

Q:What standards do your galvanized square tubes comply with?

Our products strictly comply with international standards including ASTM A500, EN 10219, JIS G3466, AS/NZS 1163, and GB/T 6728.

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

The minimum order quantity is 5 tons for standard products. For specific customizations, please contact us for details.

Q:What is the typical delivery time?

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

Q:Can you provide customization services for OEM/ODM?

Yes, we offer full customization, minor customization, and flexible customization based on customer samples or designs. We also provide OEM and ODM services.