High-Quality Carbon Steel Round Rod for Versatile Fabrication

Name: High-Quality Carbon Steel Round Rod for Versatile Fabrication
Brand: Shanghai Changzeng Metal Co., Ltd.
SKU: 2301980675

Shanghai, ChinaShanghai Changzeng Metal Co., Ltd.

US$395.00-458.00

2 Tons

Sample price:US$15.00/piece.Request sample

Product profile

Customization

Available

After-sales Service

Support

Type

Carbon Steel Bar

Standard

AISI, ASTM, GB

Technique

Cold Drawn

Application

Structural Steel Bar, Tool Steel Bar, Die Steel Bar

Surface Treatment

Polished

Alloy

Non-alloy

Special Use

Mold Steel, Free Cutting Steel, Cold Heading Steel

Place of Origin

Shanghai, China (Mainland)

Perforated or Not

Not Perforated

Item Type

Round Steel

MOQ

1 Ton

Sample

Available

Material

Steel Structure

Customized

Standards

All International Market Standards

Material Grade

Q235B/Q345b/Ss400/A36/St37

Transport Package

Big Od/ Bulk Small Od: Packed by Steel Strip

Specification

10-900mm

Trademark

Origin

Shanghai

Production Capacity

5000 Tons/ Month, 15000 Tons/ Season

Key features

Smooth, plain surface - no ribs or deformations, easy to cut, bend, and weld

Excellent formability & weldability - low carbon content ensures easy machining and strong welds

Wide material selection - Q235B, 45#, A36, S235JR, S355JR, 1045, and alloy steel grades available

Full size range - diameters from 5.5mm to 250mm, standard lengths 6m/9m/12m, custom lengths available

Multiple production processes - hot rolled (general structural use), cold drawn (precision/tighter tolerances), forged (heavy-duty)

Multiple surface finishes - black (as-rolled), bright/polished, turned, or ground

Good ductility & toughness - plastically deforms before breaking, providing safety margin in structural applications

Widely used - shafts, bolts & fasteners, machine parts, construction reinforcement, seamless tube billets, automotive components, and general fabrication

Company profile

Years of Export ExperienceHigh Repeat Buyers ChoiceIn-stock CapacityQuality Assurance

Shanghai Changzeng Metal Co., Ltd.

Shanghai, China

Business Type: Manufacturer/Factory, Trading Company CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc.Export Year: 2016-01-13Nearest Port: Shanghai Port, Tianjin Port, Qingdao PortAverage Response Time: ≤3.73hTerms of Payment: LC, T/T, PayPal, etc.

AI-Powered supplier vetting

SummaryThe supplier is a Shanghai-based trading company that also identifies as a manufacturer/factory, with 19 years of export experience and 90% of sales from exports. It offers broad customization from samples, designs, and full-custom requirements, and reports standardized finished-product inspection instructions and quality assurance. However, the available information shows no new products in the past year, no ODM, SDK, overseas agents, overseas warehouse, showroom, or offline trade-show participation. Corrective/preventive action and complaint-handling procedures are undocumented, while supplier-service assessment procedures and approved supplier records are absent. Financial operating figures provided are zero, but their interpretation is not independently verifiable from the slices. Customer cases and certifications are not provided.

Supplier typeThe supplier is described as a trading company in Shanghai and is also identified as a Trading Company, Manufacturer/Factory. This indicates a mixed trading and manufacturing business classification, but the slices do not establish the scale or scope of its own production facilities.

After-Sales capabilityThe supplier reports in-stock service capacity and lead times within 15 working days in both peak and off-seasons. However, it has no overseas warehouse, overseas showroom, overseas agents or branches, and no written procedures or records for complaint handling or corrective and preventive actions, limiting evidence of a structured after-sales system.

Financial creditThe provided financial fields report zero operating revenue, profit, margins, current ratios, and cash outflows for the stated periods, while the supplier is listed as a limited company with registered capital information. These reported operating indicators provide explicit evidence of weak financial performance, although the slices do not explain the data quality or accounting context.

R&D capabilityThe supplier reports no new products in the past year, no ODM service, and no available SDK. These statements directly indicate limited demonstrated recent product-development and technical innovation capability.

Production capacityThe supplier is classified as both a trading company and manufacturer/factory, has in-stock capacity, and reports standardized instructions for finished-product inspection and quality assurance. Nevertheless, outsourcing procedures and manufacturing-capacity contract status are unknown, and only one quality assurance/quality control inspector is reported, so production depth cannot be fully confirmed.

Customization capabilityThe supplier explicitly offers customization from samples, customization from designs, full customization, minor customization, and flexible customization in both design-service and R&D-related descriptions. This is direct evidence of broad customization coverage, although it does not quantify engineering resources or production limits.

Product Q&A

Q:What is the difference between round bar and rebar?

Round bar has a smooth surface with no ribs, offering better ductility and weldability. Rebar has surface ribs for better bonding with concrete. Round bar is typically used for shafts, bolts, and machined parts; rebar is used for concrete reinforcement. We supply both.

Q:What steel grades do you offer?

We offer carbon steel (Q235B, 45#, A36, S235JR, S355JR, 1045), alloy steel (40Cr, 42CrMo), and stainless steel (304, 316). Custom grades available upon request.

Q:What diameter range do you offer?

From 5.5mm to 250mm. Common sizes: 6mm, 8mm, 10mm, 12mm, 16mm, 20mm, 25mm, 32mm, 40mm, 50mm, and above. Custom diameters available.

Q:What is the difference between hot rolled and cold drawn round bars?

Hot rolled has a black scaled surface with standard tolerances - ideal for structural use. Cold drawn has a smooth, bright surface with tighter dimensional accuracy - perfect for precision machining and shaft applications

Q:Do you provide quality certifications?

Yes. Mill test certificates (MTC) are provided with every batch. Third-party inspections (SGS/BV) are available upon request.