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Factory Supply Q355b Hot Rolled Low Alloy Round Bar High Tensile Structural Steel Solid Rod for Construction
US$530.00
5-9 Tons
US$500.00
10-14 Tons
US$480.00
15+ Tons
Product profile
Customization
AvailableAfter-sales Service
Online Technical SupportWarranty
No WarrantyModel NO.
Q355B/S355JR/SM490BType
Carbon Steel BarStandard
AISI, ASTM, GB, JIS, DIN, EnTechnique
Hot RolledApplication
Structural Steel BarSurface Treatment
Black / UnpolishedAlloy
Non-alloyEquivalent Grade
S355jr, Q345bYield Strength
≥355MPaTensile Strength
470-630MPaCutting Service
Saw-Cut-to-Length AvailableCertificate
Mill Test Certificate (Mtc)Delivery Condition
Hot Rolled Black SurfaceTransport Package
Standard Seaworthy Steel Bundle with Steel StripsSpecification
Diameter 10-450mm, Length 6-12m or saw-cut-to-lengTrademark
OEM & ODM AcceptableOrigin
Jiangsu, ChinaHS Code
7214990000Production Capacity
50000Key features
Custom Saw-Cut Service: Available to cut bars to specific lengths upon request.
Mill Test Certificate: MTC provided for every shipment to guarantee quality.
Excellent Weldability: Superior welding and forming performance for complex structures.
Wide Diameter Range: Available in diameters from 10mm to 450mm.
OEM & ODM Acceptable: Customization from samples and designs is supported.
Fast Delivery: Lead time is 7-15 working days after deposit.
Standard Seaworthy Packing: Steel bundles fixed with steel strips for safe transport.
Company profile
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: ≤4.86h
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 your MOQ?
A:
MOQ is 5 metric tons. Small trial orders are acceptable with higher unit price.
Q:What are the trade terms?
A:
FOB Shanghai. CFR / CIF is available if you provide destination port.
Q:Can you provide MTC?
A:
Yes, Mill Test Certificate will be supplied for every batch.
Q:Do you support cutting service?
A:
Yes, custom saw-cut-to-length is available, extra cutting cost separately.
Q:What is the lead time?
A:
Normally 7-15 working days after deposit. Cutting orders take more time.
Send Inquiry
*To:
Jiangsu Changchen Materials Co., Ltd.
Jiangsu Changchen Materials Co., Ltd.*Content:
Supplier replies will be sent to your registered email
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