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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" |
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 | + |
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 | + |
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 | + |
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 | + |
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 | + |
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 | + |
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 | + |
Type 1 |
|
Columbium |
0.005-0.05% |
Type 2 | + |
Type 2 |
|
Vanadium |
0.01-0.15% |
Make sure you see the rest of Leeco Steel's High Strength Low Alloy steel plate inventory.