A709 Grade 100W High-Strength Low-Alloy Structural Steel Plates
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A709 Grade 100W High-Strength Low-Alloy Structural Steel Plates

A709 Grade 100W High-Strength Low-Alloy Structural Steel Plates

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)

 

 

Products Description

 

 

HPS 100W is specified in ASTM A 709 (Standard Specification for Carbon and High-Strength Low-Alloy Structural Steel Shapes, Plates, and Bars and Quenched-and-Tempered Alloy Structural Steel Plates for Bridges) and is being added to AASHTO M270.

A709 Grade 100

Initial applications were planned to be those in which an owner bridge engineer would approve the use of HPS 100W. This steel would be most useful for depth control over piers in long-span girder bridges or controlling the size of high-stressed elements in long-span steel truss bridges. This datasheet provides information on composition and tensile properties.

 

 

Products Specification

 

 

Gangsteel Grade :

A709 Grade 100

Specification:

Thickness 8mm-300mm, Width: 1500-4020mm, Length: 3000-27000mm

Standard:

ASTM A709: Standard Specification for Structural Steel for Bridges

Approval By Third Party

ABS, DNV, GL, CCS, LR , RINA, KR, TUV, CE

Classification:

Structural Steel for Bridges

 

 

Chemical Composition( %)

 

 

Grade/ Material

Element

Composition( Max-A, Min-I)

A709 Grade 100W/ A709 Gr100W

C

A:0.15-0.21

Mn

0.80-1.10

Si

0.40-0.80

P

A:0.035

S

A:0.035

Mechanical Properties( Mpa)

Grade/ Material

Tensile Test

MPa

A709 Grade 100W/ A709 Gr100W

Tensile Strength

690-895

Yield Strength

I:620

Elongation

I:18%

Impact Test( if any)

 

 

 

ASTM A709 Grade 100W (A709 Gr.100W) Steel Plate Applications

 

 

ASTM A709 Grade 100W steel plate is primarily used in bridge construction, highway infrastructure, and other large-scale engineering projects where high strength and superior atmospheric corrosion resistance are essential.


With a minimum yield strength of 690 MPa (100 ksi) and excellent weathering performance, it provides long-term durability even in harsh outdoor environments-reducing the need for painting or regular maintenance.

 

In bridge construction, A709 Gr.100W is often used for main girders, floor beams, cross frames, and box girders, allowing engineers to design lighter yet stronger structures with extended service life.


In highway construction, it is applied in overpasses, guardrail supports, and load-bearing members, enhancing both safety and cost-efficiency.

Additionally, this steel grade is ideal for structural components in railways, cranes, and offshore facilities, where high tensile strength and resistance to weather-induced degradation are critical.


Its combination of strength, weldability, and corrosion resistance makes A709 Grade 100W a preferred choice for sustainable, long-lasting infrastructure projects.

 

Contact now to get A709 Grade 100 Quote

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