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What is ASME SA709 Grade HPS70W High-Strength Low-Alloy Structural Steel Plates

Oct 27, 2025 Leave a message

Products Specification

 

Production Size: Thickness: 4mm- 400mm; Width: 1000mm- 4000mm; Length: 4000mm- 12000mm.

Production ability:10000 Tons Per Month.

Production Way: Hot Rolled, Quenched( Q), Tempered( T)

 

Chemical Composition( %)

 

Grade/ Material

Element

Composition( Max-A, Min-I)

SA709 Grade HPS70W/ SA709 GrHPS70W

C

A:0.11

Mn

1.10-1.35

Si

0.30-0.60

P

A:0.02

S

A:0.006

 

Mechanical Properties( Mpa)

 

Grade/ Material

Tensile Test

MPa

SA709 Grade HPS70W/ SA709 GrHPS70W

Tensile Strength

585-760

Yield Strength

I:485

Elongation

I:19%

Impact Test( if any)

 

 

Products Applications

 

SA709 Gr HPS 70W is a high-strength, low-alloy structural steel plate designed for demanding civil engineering and infrastructure projects. With its superior tensile strength, impact toughness, and weldability, this steel grade is particularly suited for bridge construction and heavy structural applications where both load-bearing capacity and long-term durability are critical.

 

Bridge Construction:

Widely used in girders, deck plates, floor beams, and trusses.

Ideal for long-span bridges due to its high tensile strength (minimum 485 MPa) and ability to withstand dynamic loads from traffic and wind.

Suitable for highway and railway bridges, where cyclic stress and fatigue resistance are essential.

 

Heavy Infrastructure Projects:

Applied in overpasses, viaducts, and elevated highways.

Supports columns, beams, and load-bearing frameworks, ensuring structural stability and safety under heavy loads.

 

Marine and Offshore Structures:

Can be used in ports, docks, and offshore platforms, thanks to its enhanced atmospheric corrosion resistance and impact toughness.

 

Industrial and Utility Structures:

Employed in crane frames, industrial machinery, and large-scale fabrication projects, where high strength, weldability, and dimensional stability are required.

 

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