Hot Rolled Q355b Carbon Structural Seamless Square Rectangular Steel Tube High Strength for Machinery & Heavy Load Steel Structure

Name: Hot Rolled Q355b Carbon Structural Seamless Square Rectangular Steel Tube High Strength for Machinery & Heavy Load Steel Structure
Brand: Jiangsu Changchen Materials Co., Ltd.
SKU: 2003020711

Jiangsu, ChinaJiangsu Changchen Materials Co., Ltd.

US$760.00

1-9 Tons

US$740.00

10-19 Tons

US$720.00

20+ Tons

Product profile

Customization

Available

After-sales Service

After-Sales Service Available

Type

Seamless

Model NO.

Hot Rolled Q355B Carbon Structural Seamless Square

Technique

Hot Rolled

Material

Carbon Steel

Surface Treatment

Black

Usage

Machinery Industry, Construction & Decoration

Section Shape

Square

Surface

Black

MOQ

1 Ton

Tolerance

Standard Tolerance

Processing Service

Cutting, Bending

Application

Construction, Machinery Manufacturing, Equipment F

Transport Package

Steel Bundles with Straps, Plastic Strips

Specification

Thickness: 3-60mm, Side Size: 10-300mm

Trademark

OEM & ODM Acceptable

Origin

Jiangsu, China

HS Code

7304900000

Production Capacity

50000

Company profile

Fast DeliveryManagement CertificationR&D CapabilitiesQA/QC Inspectors

Jiangsu Changchen Materials Co., Ltd.

Jiangsu, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs CertifiedExport Year: 1 Year CertifiedNearest Port: Shanghai PortAverage Response Time: ≤2.74h

AI-Powered supplier vetting

SummaryChangchen operates in metal materials, special steel, forgings, powder metallurgy, metal processing machinery, and cutting services. It reports customization from samples and designs, ODM availability, recent new-product development, CAD/PS-related R&D capability, and documented R&D inputs, outputs, reviews, verification, and validation. Production-related evidence includes valid contracts with associated subcontractors, inventory capability, raw-material traceability, and 100% finished-product inspection; however, only one quality inspector is reported. The supplier states that products can meet several national and international standards, but no specific certifications are identified. Overseas support is limited: there are no overseas agents or branches, warehouses, showrooms, or stated overseas service countries. Lead time is reported as within 15 working days in both peak and off-season. Financial information is insufficient for a reliable assessment, and no customer cases are provided.

Supplier typeThe supplier’s stated business scope covers sales of metal materials and products, special steel, forgings, powder metallurgy products, recycled resources, metal-processing machinery, and metal cutting services. This supports classification as a metal-material and metal-processing supplier, although the slices do not establish a more specific legal or manufacturing classification.

R&D capabilityThe supplier reports new products during the past year, R&D responsibilities covering new-product development, design drawings, production technical support, and customer specifications, plus CAD and PS software capability. It also has auditable R&D design-input, output, review, verification, and validation documentation, although no SDK is available.

Production capacityProduction-related evidence includes sawing and cutting equipment, metal cutting and processing activities, inventory capability, valid manufacturing contracts with associated subcontractors, raw-material traceability, and 100% finished-product inspection. The reported quality-control staffing is one inspector, while supplier-management procedures have no records, so capability is supported but operational depth is limited.

Customization capabilityChangchen explicitly provides customization from samples and designs, offers ODM services, and states that customized services can be developed according to customer requirements. Its R&D role includes preparing product specifications for customer approval, providing direct evidence of customer-oriented customization capability.