ASTM A656 Grade 50 is a high-strength low-alloy structural steel plate with the following properties:
| Property | Value |
|---|---|
| Yield Strength (min) | 345 MPa (50 ksi) |
| Tensile Strength (min) | 415 MPa (60 ksi) |
| Elongation in 2″ (min) | 23% |
| Elongation in 8″ (min) | 20% |
Chemical Composition:
| Element | Percentage |
|---|---|
| Carbon (C) | ≤0.18% |
| Silicon (Si) | ≤0.60% |
| Manganese (Mn) | ≤1.65% |
| Phosphorus (P) | ≤0.025% |
| Sulfur (S) | ≤0.035% |
| Nitrogen (N) | ≤0.02% |
| Vanadium (V) | ≤0.08% |
| Niobium (Nb) | 0.008-0.10% |
ASTM A656 Grade 50 is widely used in various applications, including:
ASTM A656 Grade 50 is typically produced through hot rolling processes, which improve its mechanical properties and formability.Available Dimensions:
| Thickness Range (inches/mm) | Width Range (inches/mm) | Length Range (inches/mm) |
|---|---|---|
| 0.1875 – 2.00 / 4.78 – 50.8 | 72 – 120 / 1800 – 3050 | Up to 240 / Up to 6100 |
ASTM A656 Grade 50 can be welded using standard welding techniques, but it is important to maintain proper preheat and interpass temperatures to prevent cracking.
When compared to other grades within the ASTM A656 specification, such as Grades 60, 70, and 80, Grade 50 has lower yield and tensile strength but offers improved formability for applications requiring lighter weight structures.
| Grade | Yield Strength (ksi) | Tensile Strength (ksi) |
|---|---|---|
| A656 Grade 50 | ≥50 | ≥60 |
| A656 Grade 60 | ≥60 | ≥70 |
| A656 Grade 70 | ≥70 | ≥80 |
| A656 Grade 80 | ≥80 | ≥90 |
While ASTM A656 Grade 50 may have a higher initial cost compared to standard structural steels, its high strength-to-weight ratio allows for thinner sections, which can lead to significant savings in material costs, transportation, and installation.
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