We use cookies to analyze traffic and improve your experience. We may also share your information with our analytics partners to improve our website, as detailed in our Privacy Policy. You consent to our cookies if you continue to use this website.
AASHTO M270 Structural Steel Plate
Leeco® Steel stocks and supplies AASHTO M270 structural steel plate.
Overview:
- Certified to meet the American Association of State Highway and Transportation Officials (AASHTO) specifications for use in vehicle bridges.
- Available in two grades: 50 and 50W.
- Guaranteed to meet AASHTO M270 specifications, but may also be dual certified with similar ASTM grades.
- Charpy test requirements for specific zones and climates may be requested.
Available Sizes
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" |
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 % |
| 50 | 50 | 65 | 18 |
| 50W | 50 | 70 | 18 |
Chemical Composition
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% |
