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Leeco Steel stocks the following standard sizes, but other sizes may be available for special orders.
GRADE | THICKNESS | WIDTH | LENGTH |
36 | 3/16" – 4" | 48" – 120" | Up to 480" |
50 | 3/16" – 4" | 48" – 120" | Up to 480" |
50W | 3/16" – 4" | 48" – 120" | Up to 480" |
HPS 50W | 3/16" – 4" | 48" – 120" | Up to 480" |
HPS 70W | 3/16" – 4" | 48" – 120" | Up to 480" |
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 % |
36 | 36 | 58-80 | 20 |
50 | 50 | 65 | 18 |
50W | 50 | 70 | 18 |
HPS 50W | 50 | 70 | 18 |
HPS 70W | 70 | 85-110 | 19 at 2” elongation % |
The following composition properties are ASTM specifications for the ASTM A709 grades. Note that the composition of chemicals ranges depending on the thickness of the material.
Grade 36 | |
Carbon max | 0.25-0.27% |
Manganese* | ... |
Phosphorus max | 0.030-0.040% |
Sulfur max | 0.030-0.050% |
Silicon* | 0.40% max |
Copper min | 0.20% |
* Manganese content of 0.85 to 1.35 % and silicon content of 0.15 to 0.40 % is required for grade 36 shapes with flange thickness over 3 in.
Grade 50 (max 4" thick) | |
Carbon max | 0.23% |
Manganese max | 1.35% |
Phosphorus max | 0.030% |
Sulfur max | 0.030% |
Silicon | 0.15-0.40% |
Columbium | 0.005-0.05% |
Vanadium |
0.01-0.15% |
Grade 50W | Type A | Type B |
Carbon | 0.19% max | 0.20% max |
Manganese | 0.80-1.25% | 0.75-1.35% |
Phosphorus | 0.030% max | 0.030% max |
Sulfur | 0.030% max | 0.030% max |
Silicon | 0.30-0.65% | 0.015-0.50% |
Nickel | 0.40% max | 0.50% max |
Chromium | 0.40-0.65% | 0.40-0.70% |
Copper | 0.25-0.40% | 0.20-0.40% |
Vanadium | 0.02-0.10% | 0.01-0.10% |
Grade HPS 50W & HPS 70W | |
Carbon | 0.11% max |
Manganese | 1.10-1.50% |
Phosphorus | 0.020% max |
Sulfur | 0.006% max |
Silicon | 0.30-0.50% |
Copper | 0.25-0.40% |
Nickel | 0.25-0.40% |
Chromium | 0.45-0.70% |
Molybdenum | 0.02-0.08% |
Vanadium | 0.04-0.08% |
Columbium | ... |
Aluminum | 0.010-0.040% |
Nitrogen | 0.015% max |