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Leeco Steel stocks the following standard sizes, but other sizes may be available for special orders.
GRADE | THICKNESS | WIDTH | LENGTH |
M270 50 & 50W | 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 % |
50 | 50 | 65 | 18 |
50W | 50 | 70 | 18 |
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 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 | 0.005-0.15% |
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% |