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"

Minimum order weight in the USA is 20 tons. For orders weighing less than 20 tons, additional freight surcharges may be applied. Minimum order weight for orders outside of North America is 500 MT.

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.