What is A709 steel? what are its grades ?

A709 is a high strength structural steel with low alloy that is found in various structural applications. It is specified by the ASTM under the A709/A709M standard. ASTM A709 low-alloy steel plate offers excellent mechanical properties like high tensile strength and improved atmospheric corrosion resistance. The different grades of ASTM A709 high-strength steel plates material are classified as per their yield strength. The common ones are A709 grade 36, 50, 50W and 70W; wherein W represents enhanced weathering resistance.

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ASTM A709 steel plate

How thick is ASTM A709 plate?

The thickness of ASTM A709 plates can vary with the specific grade and application requirements. ASTM A709 standard specifies different grades with specific thickness ranges. The standard thicknesses for the plates range between 3/16 to 4 inches or thicker for certain applications.

As a stockist, specializing in delivering ASTM A709 HSLA steel plate to your precise specifications in Mumbai in compliance with standards.

ASTM A709 plate

ASTM A709 plate

A709 structural steel plate

A709 structural steel plate

ASTM A709 HSLA steel plate

ASTM A709 HSLA steel plate

What is the difference between ASTM A992 and A709?

ASTM A992 is used for structural steel shapes like wide flange beams. They have a min yield strength of 345 MPa and a min tensile strength of 450 MPa. A992 products have a higher strength to weight ratio than A709. This makes it suitable for building construction where weight saving is crucial. However, it lacks the enhanced atmospheric corrosion resistance found in A709.

A709 Steel plates materials are available in different grades with varying min yield and tensile strengths. It provides enhanced atmospheric corrosion resistance in Grade 50W and Grade 70W. Thus, they are suitable for bridge applications as it is exposed to outdoor environments.

As a trustworthy exporter, we provide reasonably priced a709 grade plate in Dubai in thickness ranging from 0.1875 to 3.00 inch and lengths ranging from 240 to 1200 inch.

ASTM A709 steel plate specification

ASTM A709 steel plate specification

Thickness Width Length
3/16 to 4″ 48 to 120 “ upto 480 “
Process Application Grades
hot and cold rolled pedestrian bridges, construction Gr 36, 50, 50W, HPS 50W, HPS 70W
We can deliver customized ASTM A709 structural steel plate with the highest standards and a superb finish; view the different types.
Most popular types of ASTM A709 structural steel plate

ASTM A709 low-alloy steel plate

ASTM A709 low-alloy steel plate

  • Grade 36
  • Grade 50
  • Grade 50W

A709 grade plate

A709 grade plate

  • Width: : 72 to 120 inch
  • Thickness: 0.1875 to 3.00 inch
  • Length: 240 to 1200 inch

ASTM A709 high-strength steel plate

ASTM A709 high-strength steel plate

  • Waterjet cutting
  • Flame cutting
  • Plasma & laser cutting
Supplying ASTM A709 high-strength low-alloy steel plate with Mill TC at the most affordable price, view their chemical, equivalent and mechanical property
Size chart of ASTM A709 plate
GRADE THICKNESS WIDTH LENGTH
50 3/16″ – 4″ 48″ – 120″ UP TO 480″
36 3/16″ – 4″ 48″ – 120″ UP TO 480″
HPS 50W 3/16″ – 4″ 48″ – 120″ UP TO 480″
50W 3/16″ – 4″ 48″ – 120″ UP TO 480″
HPS 70W 3/16″ – 4″ 48″ – 120″ UP TO 480″
ASTM A709 HSLA steel plates mechanical properties
GRADE TENSILE STRENGTH (KSI) YIELD POINT (KSI) MIN. 8” ELONGATION %
50 65 50 18
36 58-80 36 20
HPS 50W 70 50 18
50W 70 50 18
HPS 70W 85-110 70 19 AT 2” ELONGATION %
A709 grade plates chemical properties
NI CU P S MN C SI CR V
0.40% Max 0.25 – 0.40% 0.030% Max 0.030% Max 0.80 – 1.25% 0.19% Max 0.30 – 0.65% 0.40 – 0.65% 0.02 – 0.10%
Application of ASTM A709 structural steel plate
  • Pedestrian bridges
  • Railroad bridges and overpasses
  • Highway bridge girders and additional components
Technical dimensions of a709 grade plate
WIDTH (INCHES) GAUGE (INCHES) LENGTH (INCHES)
60/96/120 0.2500 240/480
96 0.1875 240/480
60/96/120 0.3750 240/480
0.3125 240/480
0.6250 240/480
0.5000 240/480
0.8750 240/480
0.7500 240/480
96 4.0000 240
60/96/120 1.0000 240/480
1.2500 240/480
1.1250 240/480
1.7500 240/480
1.5000 240/480
2.0000 240/480
96 2.5000 240/480
96 2.2500 240/480
96 3.0000 240/480
96 2.7500 240/480
96 3.5000 240
96 3.2500 240
96 3.7500 240
 Over 4″ Please Inquire

What are the criteria for inspection and testing ASTM A709 plate ?

  • Visual Inspection- A709 grade plates are visually examined for surface defects, cracks and other imperfections.
  • Dimensional Check- To verify the dimensions as per the specified tolerances.
  • Chemical Composition Analysis- To confirm that the plate’s chemical composition meets the required standards.
  • Mechanical Properties Testing- To assess the plate’s mechanical strength and properties.
  • Ultrasonic Testing- To detect internal defects and discontinuities.

What is the difference between A709 and A572 steel?

ASTM A709 HSLA steel plate material is a structural steel used in outdoor applications due to its enhanced corrosion resistance properties. ASTM A572 is used for general structural purposes. A709 comes in different grades with varying min yield and tensile strengths. A572 is also available in different grades but with specified min yield and tensile strengths.

What are the most popular uses ASTM A709 structural steel plate ?

ASTM A709 structural steel plate is ideal for various outdoor applications.

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