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Q355b Hot Rolled Carbon Steel Round Bar S355jr Q345b Structural Bar for Building & General Structure

Name: Q355b Hot Rolled Carbon Steel Round Bar S355jr Q345b Structural Bar for Building & General Structure
Brand: Jiangsu Changchen Materials Co., Ltd.
SKU: 1926432756

Jiangsu, ChinaJiangsu Changchen Materials Co., Ltd.

US$530.00

5-9 Tons

US$500.00

10-14 Tons

US$480.00

15+ Tons

Product profile

Customization

Available

After-sales Service

Online Technical Support

Warranty

No Warranty

Model NO.

Q355B

Type

Carbon Steel Bar

Standard

AISI, ASTM, GB, JIS, DIN, En

Technique

Hot Rolled

Application

Structural Steel Bar

Surface Treatment

Black / Unpolished

Alloy

Non-alloy

Equivalent Grade

S355jr, Q345b

Yield Strength

≥355MPa

Tensile Strength

470-630MPa

Cutting Service

Saw-Cut-to-Length Available

Certificate

Mill Test Certificate (Mtc)

Delivery Condition

Hot Rolled Black Surface

Transport Package

Standard Seaworthy Steel Bundle with Steel Strips

Specification

Diameter 10-450mm, Length 6-12m or saw-cut-to-leng

Trademark

OEM & ODM Acceptable

Origin

Jiangsu, China

HS Code

7214990000

Production Capacity

50000

Key features

Custom Saw-Cut Service: Available saw-cut-to-length service to meet specific project requirements.

Mill Test Certificate: MTC provided for every shipment to guarantee material quality and traceability.

Excellent Weldability: Features good welding and forming performance suitable for structural frames.

Wide Size Range: Diameter available from 10mm to 450mm with lengths of 6-12m or custom.

OEM & ODM Support: Accepts OEM and ODM customization from samples and designs.

Fast Lead Time: Standard delivery within 7-15 working days after deposit receipt.

Seaworthy Packing: Standard steel bundle packing with steel strips for safe ocean transport.

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: ≤3.85h

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.