Structural, Carbon &
HSLA Steel Plate
ASTM A709

A high-strength, low-alloy structural steel plate utilized primarily in the manufacture of bridges. Chapel Steel stocks A709 Grade 36, A709 Grade 50 and A709 Grade 50W. These grades are often specified with Charpy tests referencing the specific zone or lowest anticipated service temperature. The Charpy tests are specified as non-fracture critical, which is a per-heat test (frequency "H"), or fracture critical, which is a per-plate test (Frequency "P"). Bridge steels can also be ordered to the ASSHTO M270 Specification referenced as AASHTO M270 Grade 36, AASHTO M270 Grade 50, AASHTO M270 Grade 50W.


Mechanical Properties 709 Gr 36:

Tensile:
58 to 80 ksi
Yield:
36 ksi min
Elongation:
18% min in 8" 21% min in 2"

Mechanical Properties 709 Gr 50:

Tensile:
65 min ksi
Yield:
50 ksi min
Elongation:
16% min in 8" 19% min in 2"

Mechanical Properties 709 Gr 50W:

Tensile:
65 min ksi
Yield:
50 ksi min
Elongation:
16% min in 8" 19% min in 2"

Non Fracture Critical Zone 1 Zone 2 Zone 3
36, 50 & 50W up to 4" 15 ft/lbs @ 70°F 15 ft/lbs @ 40°F 15 ft/lbs @ 10°F
Over 2" to 4" Welded 20 ft/lbs @ 70°F 20 ft/lbs @ 40°F 20 ft/lbs @ 10°F
Fracture Critical         Zone 1 Zone 2 Zone 3
36, 50 & 50W up to 4" 25 ft/lbs @ 70°F 25 ft/lbs @ 40°F 25 ft/lbs @ 10°F
Over 2" to 4" Welded 30 ft/lbs @ 70°F 30 ft/lbs @ 40°F 30 ft/lbs @ 10°F

STOCK SIZES A709 Gr 36

Grade Gauge (Inches) Width (Inches) Length (Inches)
A709 Gr 36 0.1875 96 240/480
A709 Gr 36 0.2500 60/96/120 240/480
A709 Gr 36 0.3125 60/96/120 240/480
A709 Gr 36 0.3750 60/96/120 240/480
A709 Gr 36 0.5000 60/96/120 240/480
A709 Gr 36 0.6250 60/96/120 240/480
A709 Gr 36 0.7500 60/96/120 240/480
A709 Gr 36 0.8750 60/96/120 240/480
A709 Gr 36 1.0000 60/96/120 240/480
A709 Gr 36 1.1250 60/96/120 240/480
A709 Gr 36 1.2500 60/96/120 240/480
A709 Gr 36 1.5000 60/96/120 240/480
A709 Gr 36 1.7500 60/96/120 240/480
A709 Gr 36 2.0000 60/96/120 240/480
A709 Gr 36 2.2500 96 240/480
A709 Gr 36 2.5000 96 240/480
A709 Gr 36 2.7500 96 240/480
A709 Gr 36 3.0000 96 240/480
A709 Gr 36 3.2500 96 240
A709 Gr 36 3.5000 96 240
A709 Gr 36 3.7500 96 240
A709 Gr 36 4.0000 96 240
A709 Gr 36 5.0000 96 240
A709 Gr 36 6.0000 96 240

STOCK SIZES A709 Gr 50

Grade Gauge (Inches) Width (Inches) Length (Inches)
A709 Gr 50 0.1875 96 240/480
A709 Gr 50 0.2500 60/96/120 240/480
A709 Gr 50 0.3125 60/96/120 240/480
A709 Gr 50 0.3750 60/96/120 240/480
A709 Gr 50 0.5000 60/96/120 240/480
A709 Gr 50 0.6250 60/96/120 240/480
A709 Gr 50 0.7500 60/96/120 240/480
A709 Gr 50 0.8750 60/96/120 240/480
A709 Gr 50 1.0000 60/96/120 240/480
A709 Gr 50 1.1250 60/96/120 240/480
A709 Gr 50 1.2500 60/96/120 240/480
A709 Gr 50 1.5000 60/96/120 240/480
A709 Gr 50 1.7500 60/96/120 240/480
A709 Gr 50 2.0000 60/96/120 240/480
A709 Gr 50 2.2500 96 240/480
A709 Gr 50 2.5000 96 240/480
A709 Gr 50 2.7500 96 240/480
A709 Gr 50 3.0000 96 240/480
A709 Gr 50 3.2500 96 240
A709 Gr 50 3.5000 96 240
A709 Gr 50 3.7500 96 240
A709 Gr 50 4.0000 96 240
A709 Gr 50 5.0000 96 240
A709 Gr 50 6.0000 96 240

STOCK SIZES A709 Gr 50W

Grade Gauge (Inches) Width (Inches) Length (Inches)
A709 Gr 50W 0.1875 96 240/480
A709 Gr 50W 0.2500 96 240/480
A709 Gr 50W 0.3125 96 240/480
A709 Gr 50W 0.3750 96 240/480
A709 Gr 50W 0.5000 96 240/480
A709 Gr 50W 0.6250 96 240/480
A709 Gr 50W 0.7500 96 240/480
A709 Gr 50W 0.8750 96 240/480
A709 Gr 50W 1.0000 96 240/480
A709 Gr 50W 1.1250 96 240/480
A709 Gr 50W 1.2500 96 240/480
A709 Gr 50W 1.5000 96 240/480
A709 Gr 50W 1.7500 96 240/480
A709 Gr 50W 2.0000 96 240/480
A709 Gr 50 2.2500 96 240/480
A709 Gr 50 2.5000 96 240/480
A709 Gr 50 2.7500 96 240/480
A709 Gr 50 3.0000 96 240/480
A709 Gr 50 3.2500 96 240
A709 Gr 50 3.5000 96 240
A709 Gr 50 3.7500 96 240
A709 Gr 50 4.0000 96 240
A709 Gr 50 5.0000 96 240
A709 Gr 50 6.0000 96 240