A572 Steel Plate

ASTM A572 is used in a variety of structural applications, and is available in five grades: 42, 50, 55, 60 & 65.  

Overview:

  • Popular steel plate grade used for a variety of structural applications including bridges, buildings, construction equipment, freight cars, machinery, truck parts and transmission towers.
  • Available in five grades: 42, 50, 55, 60 and 65.
  • Available in standard and heavy (3-inches or greater) plate thickness.
  • May be certified to multiple standards on Mill Test Report, but guaranteed to be certified to meet ASTM A572 standards.

Available Sizes

Leeco® Steel stocks the following standard sizes at our distribution centers, but other sizes may be available for special orders.

GRADE THICKNESS WIDTH LENGTH
Grade 42 4" – 6" 48" – 120" Up to 480"
Grade 50 3/16" – 4" 48" – 120" Up to 480"
Grade 55 3/16" – 1 1/2" 48" – 120" Up to 480"
Grade 60 3/16" – 1 1/4" 48" – 120" Up to 480"
Grade 65 3/16" – 1 1/4" 48" – 120" Up to 650"

Material Properties

The following material properties are ASTM specifications and will be confirmed on the Mill Test Report.

Grade

Yield Point (ksi)

Tensile Strength (ksi)

Min. 8" Elongation %

42

42

60

20

50

50

65

18

55

55

70

17

60

60

75

16

65

65

80

15

 

Chemical Composition

The following composition properties are ASTM specifications for the A572 grades.

Grade 42

 

Carbon max

0.21%

Manganese max

1.35%

Phosphorus max

0.030%

Sulfur max

0.030%

Silicon to 1 1/2" thick, max

0.40%

Silicon over 1 1/2" thick

0.15-0.40%

 

Grade 50

 

Carbon max

0.23%

Manganese max

1.35%

Phosphorus max

0.030%

Sulfur max

0.030%

Silicon to 1 1/2" thick. max

0.40%

Silicon over 1 1/2" thick

0.15-0.40%

 

Grade 55

 

Carbon max

0.25%

Manganese max

1.35%

Phosphorus max

0.030%

Sulfur max

0.030%

Silicon to 1 1/2" thick, max

0.40%

Silicon over 1 1/2" thick

0.15-0.40%

 

 

Grade 60

 

Carbon max

0.26%

Manganese max

1.35%

Phosphorus max

0.030%

Sulfur max

0.030%

Silicon max

0.40%

 

Grade 65 ≤1/2" Thick

 

Carbon max

0.26%

Manganese max

1.35%

Phosphorus max

0.030%

Sulfur max

0.030%

Silicon max

0.40%

 

Grade 65 Over 1/2" to 1 1/4" Thick

 

Carbon max

0.23%

Manganese max

1.65%

Phosphorus max

0.030%

Sulfur max

0.030%

Silicon max

0.40%

Other alloys can be used at the discretion of the producer, but is limited to the ranges of four types: 1, 2, 3 and 4. Types 1 and 2 are the most common and are specified below:

Type 1

 

Columbium

0.005-0.05%

 

Type 2

 

Vanadium

0.01-0.15%

Make sure you see the rest of Leeco Steel's High Strength Low Alloy steel plate inventory.