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ASTM A709 Steel Plate

Material Type: Carbon and High-Strength Low-Alloy Steel

Hardness Typically : 125-185 HB (Brinell Hardness)

Thickness Range: 6 mm to 150 mm

Width Range: 1,000 mm to 3,500 mm

Length Range: 2,000 mm to 12,000 mm

Delivery Options: Standard delivery, Cut-to-size, Custom shapes, Bulk orders

Standard Compliance: ASTM A709 / A709M

ASTM A709 Gr 50 steel plate for shipbuilding steel plate ASTM A709 Grade 50 High Strength Steel Plate ASTM A709 Steel Plate -Grade 36,50,50W,HPS100 Structural Steel for Bridges ASTM A709 GR 36/50/50W/100/100W Steel Plate

Introduction
Parameters
Service

What is ASTM A709 steel plate?

ASTM A709 steel plate is a high-strength, low-alloy structural steel used in bridge construction and other structural applications. It is specifically designed for improved toughness and durability, withstanding harsh environmental conditions such as weathering and corrosion. ASTM A709 steel plate offers excellent weldability, high strength, and toughness, making it ideal for critical infrastructure projects.

The different grades of A709 steel plate include:

• Grade 36: This grade has a minimum yield strength of 36 ksi (250 MPa) and is commonly used for bridges with general construction purposes.

• Grade 50: This grade has a minimum yield strength of 50 ksi (345 MPa) and is frequently used in bridges with enhanced atmospheric corrosion resistance.

• Grade 50W: This grade has a minimum yield strength of 50 ksi (345 MPa) and offers improved atmospheric corrosion resistance compared to Grade 50. It is commonly used in bridges where exposure to weather elements is a concern.

• Grade HPS 50W: This grade has a minimum yield strength of 50 ksi (345 MPa) and is characterized by its enhanced toughness and weldability. It is often used in bridges with high-demanding conditions and requirements.

• Grade HPS 70W: This grade has a minimum yield strength of 70 ksi (485 MPa) and provides high strength, excellent toughness, and improved weldability. It is typically used in bridges requiring high-performance materials.

ASTM A709 Steel Plate Grade 36, Grade 50, Grade 50W, Grade 100 & 100W Dimensions

Grade	Plate Thickness (inches)	Plate Width (inches)	Plate Length (inches)
Grade 36	0.25 – 4.00	48, 60, 72	96, 120, 144, 240
Grade 50	0.25 – 4.00	48, 60, 72	96, 120, 144, 240
Grade 50W	0.25 – 6.00	60, 72	96, 120, 240
Grade 59	0.25 – 6.00	60, 72	96, 120, 240
Grade 100	0.25 – 6.00	60, 72	96, 120, 240
Grade 100W	0.25 – 6.00	60, 72	96, 120, 240

ASTM A709 Steel Plate Common Applications:

Bridge construction (both small and large span bridges)
Highway overpasses
Infrastructure projects requiring long-lasting, low-maintenance materials

Specification Parameters

Basic Information

ASTM A709 Chemical Composition

Element	Grade 36 (%)	Grade 50 (%)	Grade 50W (%)	Grade 100 (%)	Grade 100W (%)
Carbon (C)	0.26 max	0.23 max	0.19 max	0.20 max	0.20 max
Manganese (Mn)	0.80-1.35	0.50-1.50	0.50-1.50	0.70-1.60	0.70-1.60
Phosphorus (P)	0.04 max	0.04 max	0.04 max	0.03 max	0.03 max
Sulfur (S)	0.05 max	0.05 max	0.05 max	0.05 max	0.05 max
Silicon (Si)	0.15-0.40	0.15-0.40	0.15-0.40	0.15-0.40	0.15-0.40
Copper (Cu)	–	–	0.20-0.40	0.35 max	0.35 max
Nickel (Ni)	–	–	0.40 max	0.40 max	0.40 max
Chromium (Cr)	–	–	0.40-0.65	0.40-0.65	0.40-0.65
Molybdenum (Mo)	–	–	0.15 max	0.15 max	0.15 max
Vanadium (V)	–	–	0.02-0.10	0.02-0.10	0.02-0.10

ASTM A709 Mechanical Properties

Property	Grade 36	Grade 50	Grade 50W	Grade 100	Grade 100W
Yield Strength (ksi)	36 min	50 min	50 min	100 min	100 min
Tensile Strength (ksi)	58-80	65-85	70-95	110-130	110-130
Elongation (%)	20	18	16	14	14
Charpy V-Notch (ft-lbs)	N/A	15 min	15 min	35 min	35 min