What is your packing method?

Bundled with steel straps. We can also pack with woven bags or wooden cases for small diameter pipes to avoid damage during sea transport.

Q345b Hot Rolled Seamless Pipe Black Surface Plain/Bevel End Custom Cutting for Structural Components

Name: Q345b Hot Rolled Seamless Pipe Black Surface Plain/Bevel End Custom Cutting for Structural Components
Brand: Jiangsu Changchen Materials Co., Ltd.
SKU: 2188643342

Jiangsu, ChinaJiangsu Changchen Materials Co., Ltd.

US$620.00

1-4 Tons

US$600.00

5-9 Tons

US$580.00

10+ Tons

Product profile

Customization

Available

After-sales Service

Online Technical Support, After-Sales Service for

Type

Seamless

Model NO.

Q345B Hot Rolled Seamless Pipe

Technique

Hot Rolled

Material

Carbon Steel

Surface Treatment

Black/ Oiled/ Anti-Rust Painted

Usage

Hydraulic/Automobile Pipe, Machinery Industry, Construction & Decoration

Section Shape

Round

Material Grade

Q345b Carbon Structural Steel

Processing Service

Cutting, Machining

Application

Mechanical Processing, Construction Structure

Standard

GB/T8162

Transport Package

Steel Bundles with Straps, Wrapped by Waterproof W

Specification

OD: 16-426mm, WT: 2.5-40mm, Length: 6m/9m/12m

Trademark

OEM & ODM Acceptable

Origin

Jiangsu, China

HS Code

7304399000

Production Capacity

30000tons/Year

Key features

Customizable Material Grades: Available in 20#, 45#, Q235B, Q355B, S235JR, S355JR and other customizable options.

Custom Cutting Service: Pipes can be cut to custom fixed lengths with deburring available upon request.

Flexible Surface Treatment: Options include black finish, shot blasting, painting, or anti-rust oil based on requirements.

Wide Size Range: Outer diameter from 10mm to 630mm and wall thickness from 2mm to 60mm.

Quality Assurance: Mill test certificates provided with chemical composition analysis and mechanical property tests.

Versatile Applications: Suitable for mechanical manufacturing, construction, fluid delivery, and automotive industries.

OEM & ODM Support: Full customization from samples and designs with dedicated R&D engineers.

Fast Delivery: Regular sizes delivered within 7-15 working days.

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 is the difference between carbon structural seamless steel pipe and fluid seamless steel pipe?

Carbon structural seamless pipe (GB/T8162) is mainly used for mechanical structure and engineering load-bearing parts, not for pressure fluid transportation. Fluid seamless pipe is specially designed for conveying medium with pressure.

Q:Can you cut the seamless steel pipe according to our required length?

Yes, we provide cutting service. We can cut pipes to your custom fixed length, and deburring is available upon request.

Q:What kind of surface treatment can you supply?

Normally we supply black hot rolled finish. We can also offer shot blasting, painting or anti-rust oil as customer requirements.

Q:How to guarantee the quality of your carbon seamless steel pipes?

Each batch will carry out chemical composition analysis and mechanical property test. Mill test certificate (MTC) can be provided before shipment.

Q:What is your delivery time?

For regular sizes, delivery is about 7-15 working days. Custom non-standard sizes need longer lead time, subject to actual production schedule.