Gnee Supplies 1198 Tons Of A709 GR.345W Steel Plates And Pipes For Vietnam

01/06/2026

Gnee (Tianjin) Multinational Trade Co., Ltd has successfully supplied 1198 tons of ASTM A709 Grade 345W steel plates and welded pipes to Vietnam, supporting a major bridge and highway construction program.

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This shipment demonstrates Gnee’s capability to provide high-quality, weathering-resistant steel for large-scale infrastructure projects in Southeast Asia.

Material Specification: ASTM A709 GR.345W
Material Type:

Steel Plates: Thickness 5–45 mm, width 1000–2500 mm

Welded Pipes: OD 150–500 mm, wall thickness 6–25 mm
Surface Treatment: Anti-corrosion oil coating; optional SA 2.5 sandblasting for outdoor structures

Applications

A709 GR.345W steel plates and welded pipes will be applied in Vietnam’s bridge decks, highway safety structures, and auxiliary infrastructure:

Bridge Main Girders and Deck Plates

Steel plates form primary girders and deck plates to support vehicle loads.

Welded pipes are used as hollow columns, providing high load capacity with reduced weight.

Weathering steel ensures long-term durability in humid and coastal environments.

Highway Guardrails and Safety Barriers

Pipes act as impact-resistant supports for guardrails along expressways.

Maintain structural integrity under dynamic vehicle collisions and tropical weather conditions.

Cable Conduits and Structural Supports

Protects electrical and communication cables on bridges.

Pipes provide dimensional stability and uniform load distribution, ensuring safety in high-vibration environments.

Stormwater and Drainage Systems

Steel plates and pipes form drainage channels and supports for stormwater management.

Resistant to chemical corrosion and erosion, suitable for industrial and urban infrastructure.

Port and Marine Infrastructure

Applied in dock supports, crane bases, and coastal retaining structures.

Self-protecting patina reduces maintenance intervals and increases lifespan in saline, humid coastal areas.

Chemical Composition (%):

Element	C	Mn	Si	P	S	Cu	Cr	Ni
Content	0.17	1.18	0.30	0.06	0.03	0.32	0.48	0.34

Mechanical Properties:

Property	ASTM Requirement	Gnee Test Result	Remark
Yield Strength	≥345 MPa	353–357 MPa	Exceeds standard
Tensile Strength	480–620 MPa	527 MPa	Stable across batches
Elongation	≥18%	21%	Excellent ductility
Charpy Impact (–20°C)	≥27 J	34 J	Superior low-temperature toughness

Quality Inspection:

Test	Standard	Purpose	Result
Radiographic Examination	ASTM E94	Detect internal defects	Passed
Ultrasonic Flaw Detection	ASTM E213	100% volume scan	Passed
Flattening/Bending Test	ASTM A370	Verify ductility and weld integrity	Passed
Coating Thickness	ISO 2178	Ensure protective layer uniformity	Passed
Third-party Verification	SGS	Independent certification	Certified

Packaging and Logistics

Item	Details
Total Weight	1198 tons
Packaging	Anti-rust oil + waterproof plastic film + steel banding + wooden frames
Container Type	40FT HQ + bulk cargo
Loading Port	Tianjin Xingang, China
Destination Port	Hai Phong, Vietnam
Transit Time	14–15 days
Tracking	GPS real-time shipment monitoring

The successful delivery of 1198 tons of A709 GR.345W steel plates and welded pipes demonstrates Gnee’s ability to meet stringent project requirements for large-scale infrastructure. By combining high-performance weathering steel, rigorous quality control, and reliable logistics, Gnee ensures that Vietnam’s bridge and highway projects are built with durable, safe, and cost-effective materials.

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