What is your export packaging method?

We use standard export bundling packaging. Steel strips tightly bind the steel bars with waterproof wrapping to avoid moisture and rust during sea transport. Custom packaging requirements are negotiable.

Cold Drawn Q355b Carbon Steel Flat Bar High Strength for Support Frame

Name: Cold Drawn Q355b Carbon Steel Flat Bar High Strength for Support Frame
Brand: Jiangsu Changchen Materials Co., Ltd.
SKU: 1999009521

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

Solid Bar

Model NO.

Cold Drawn Q355B Carbon Steel Flat Bar

Technique

Cold Drawn

Material

Carbon Steel

Surface Treatment

Bright / Smooth

Usage

Machinery Industry, Construction & Decoration, Special Purpose

Section Shape

Rectangular

Surface

Bright, Smooth Surface

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

7215500000

Production Capacity

50000

Key features

Customizable Dimensions: Width, thickness, and fixed cutting lengths can be customized based on customer drawings.

Multiple Steel Grades: Available in Q235B, Q355B, 20#, 45#, S235JR, and S355JR with customizable options.

Versatile Processing: Supports cutting, bending, punching, drilling, and milling for various fabrication needs.

Quality Assurance: Mill test certificates provided with batch chemical and mechanical property testing.

Wide Application Range: Used in machinery, construction, transportation, automotive, and mining industries.

Stable Mechanical Properties: Features high tensile strength, excellent weldability, and neat edges.

Flexible Manufacturing: Produced via hot rolling or cold drawing processes to meet specific demands.

Custom Packaging: Standard export bundling available with negotiable custom packaging requirements.

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.

Product Q&A

Q:What are the advantages of carbon steel flat bar?

Carbon steel flat bar features stable mechanical performance, neat edges and good machinability. It can be processed by cutting, bending and punching, widely used for machinery manufacturing and building structural supports.

Q:What steel grades are available for your flat bar?

We supply multiple carbon structural steel grades including Q235B, Q355B, 20# and 45#. Custom grades and specifications can be provided upon customer requirements.

Q:Can you produce non-standard sizes and fixed cutting lengths?

Yes. We can customize non-standard width, thickness and precise fixed cutting lengths. Products can be manufactured strictly according to customer drawings and technical parameters.

Q:How do you guarantee product quality and inspection?

Raw materials are sourced from qualified large steel mills. Every batch will go through chemical composition analysis and mechanical property tests before delivery. Mill test certificates and inspection reports can be offered for third-party inspection.

Q:What is your delivery cycle?

Regular stock sizes can be delivered fast. For customized non-standard products, the lead time is about 7-15 working days after deposit received. Exact time depends on order quantity and production plan.