What is the warranty period and after-sales service?

We provide a 3-year warranty and maintenance services for all our guardrail posts.

What certifications does the manufacturer hold?

The factory holds ISO9001, CE, SGS, ISO14001, and RoHS certifications.

What is the lead time for orders?

The average lead time is within 15 workdays for both peak and off-peak seasons.

Steel Galvanized C Post Guardrail Post for Highway Roadway Use

Name: Steel Galvanized C Post Guardrail Post for Highway Roadway Use
Brand: Shandong Guanxian Dahai Composite Material Co., Ltd.
SKU: 2285376295

Shandong, ChinaShandong Guanxian Dahai Composite Material Co., Ltd.

US$700.00-900.00

20 Tons

Sample price:US$15.00/kg.Request sample

Product profile

Customization

Available

After-sales Service

Maintenance

Warranty

3 Years

Model NO.

guardrail post

Certification

ISO9001, CE

Surface Treatment

Galvanized

Position

Road Side

Material

Steel

Tensile Strength

Minimum 495 MPa

R&D Capacity

Own Brand

Beams

W / Thrie Beam / Wave

Elongation

in 50mm (2 in), Minimum, 15 Percent

Yield Point

Minimum 355MPa

Transport Package

Containers

Specification

Customized

Trademark

Guanzhoudahai

Origin

China

HS Code

7308900000

Production Capacity

150, 000 Mt/Year

Key features

High Tensile Strength: Minimum 495 MPa tensile strength using A572, Q345B, and S355JR steel grades.

International Compliance: Meets AASHTO M180, EN1317, RAL RG620, and AS NZS 3845-1999 standards.

Customizable Colors: Available in zinc-silver, green, yellow, blue, and gray to match regional specs.

OEM Capabilities: Source manufacturer offering own-brand products and full customization options.

Wide Compatibility: Compatible with W-beam, Thrie beam, and wave-type guardrail systems.

3-Year Warranty: Comprehensive 3-year warranty coverage with maintenance after-sales service.

Certified Quality: ISO9001, CE, SGS, and ISO14001 certified with 100% product inspection.

Company profile

100% Finished Products InspectionCustomization from SamplesNational Award receivedProduct Certification

Shandong Guanxian Dahai Composite Material Co., Ltd.

Shandong, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 1 year CertifiedNearest Port: Qingdao portAverage Response Time: ≤0.01h CertifiedTerms of Payment: LC, T/T, D/P, etc.

AI-Powered supplier vetting

SummaryThe supplier operates in metal products, steel processing, traffic and public-administration signage, traffic-safety equipment, metal structures, and high-performance fibers and composites. It holds ISO9001:2015 and CE certifications, reports documented procedures for service assessment, corrective actions, and complaint handling, and has six to ten quality-control staff. The supplier demonstrates customization capability and reports new products within the past year, but does not provide ODM services, SDKs, overseas warehouses, showrooms, agents, or branches. Financial information is limited to year labels without substantive performance figures, so financial credibility cannot be determined. No Fortune 500 cooperation or well-known-brand OEM experience is reported. Production scale, capacity, and customer references are not sufficiently evidenced.

Supplier typeThe supplier is a manufacturer and seller covering metal structures, metal materials and products, steel rolling, traffic and public-administration signs, traffic-safety equipment, mechanical and electrical equipment, and high-performance fibers and composite materials. The stated scope also includes goods import and export, indicating both manufacturing and trading activities.

CertificationsThe supplier reports an ISO9001:2015 management-system certificate and CE product compliance certification. These are explicit certifications relevant to quality management and product conformity, although the supplied information does not specify their scope or validity dates.

After-Sales capabilityThe supplier has written and followed procedures for service-capability assessment, corrective and preventive actions, and customer complaint handling. However, it has no overseas warehouse, showroom, agent, or branch, and reports zero countries with overseas services, which limits documented overseas service coverage.

R&D capabilityThe supplier reports two years of total R&D engineer experience, one national science and technology progress award, and new products within the past year. It does not provide an SDK and does not offer ODM services, so the evidence supports some innovation activity but not broad software or ODM capability.

Production capacityThe supplier lists multiple manufacturing activities, including metal products, steel rolling, signage, traffic-safety equipment, metal structures, and composite materials, and reports six to ten quality-control staff. Lead times are stated as within 15 working days in both peak and off-season, but production capacity, equipment, output, and facility scale are not provided.

Customization capabilityThe supplier explicitly offers customization from samples, designs, full customization, minor customization, and flexible customization. This directly supports a broad product-customization capability, although ODM service is specifically unavailable.