What is the delivery time?

Standard delivery is 7-15 working days. During peak season, lead time may extend to one month.

What surface treatments are available?

We provide Black Bare and Hot Dipped Galvanized surface treatments.

High-Strength Q355b Carbon Steel Square Pipe with Custom Sizes

Name: High-Strength Q355b Carbon Steel Square Pipe with Custom Sizes
Brand: Shandong Kanghong Manufacturing Co., Limited
SKU: 2153548972

Shandong, ChinaShandong Kanghong Manufacturing Co., Limited

US$350.00-500.00

5 Tons

Product profile

Customization

Available

Type

Welded

Technique

ERW Hot Rolled Square Tube

Model NO.

Q235B, Q355B, A500, S235JR

Material

Carbon Steel

Surface Treatment

Black Bare, Hot Dipped Galvanized

Usage

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

Standard

GB, ASTM, En, JIS

Grade

Q235B, Q355b, A500, S235jr

Section Size

Customized

Wall Thickness

1.0mm-20.0mm

Length

6m,9m,12m, Customized

MOQ

5 T

Delivery Time

7-15 Working Days

Sample Policy

Free Sample Available, Freight Collect

Processing Service

Cutting, Punching, Welding, Bending

Supply Ability

10000 Tons/Month

Price Terms

Fob Qingdao, CIF, EXW

Transport Package

Standard Seaworthy Packing

Trademark

KANGHONG

Origin

Shandong, China

HS Code

7306309000

Production Capacity

500000 Ton

Key features

Customized Dimensions: Section size and length available in custom options beyond standard 6m, 9m, 12m.

Wide Material Range: Carbon steel grades including Q235B, Q355b, A500, S235jr, and ASTM A36.

Multiple Surface Treatments: Available in Black Bare or Hot Dipped Galvanized finishes.

Extensive Wall Thickness: Wall thickness ranges from 1.0mm to 15.75mm depending on size.

OEM and ODM Services: Full customization, minor customization, and flexible customization from samples or designs.

High Supply Capacity: Monthly supply ability of 10,000 tons with 2 production lines.

Versatile Applications: Suitable for pipeline transport, construction, machinery, oil/gas drilling, and food industry.

Fast Delivery: Delivery time of 7-15 working days for regular orders.

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.