What is A514 / T-1 Steel Plate?
ASTM A514, also called T-1 steel, is a quenched and tempered (Q&T) steel plate designed for high strength, impact resistance, and excellent weldability. Engineered through a precise heat treatment process, A514 steel plate is ideal for heavy-load structures, cranes, and mining equipment that require durability and performance under stress.
🔍 Key Features at a Glance
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High yield strength for demanding structural applications
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Excellent weldability with proper procedure
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Machinable with conventional techniques
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Toughness at low temperatures
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Available in 8 grades: B, S, H, Q, E, F, A, and P
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Suited for heavy plates: up to 8 inches thick
📐 Available Sizes by Grade
| Grade | Thickness | Width | Length |
|---|---|---|---|
| B | 3/16″ – 1 1/4″ | 48″ – 120″ | Up to 480″ |
| S | 3/16″ – 2 1/2″ | 48″ – 120″ | Up to 480″ |
| H | 3/16″ – 2″ | 48″ – 120″ | Up to 480″ |
| Q | 3/16″ – 8″ | 48″ – 120″ | Up to 480″ |
| E | 3/16″ – 6″ | 48″ – 120″ | Up to 480″ |
| F | 3/16″ – 2 1/2″ | 48″ – 120″ | Up to 480″ |
| A | Inquire | Inquire | Inquire |
| P | Inquire | Inquire | Inquire |
🔬 Chemical Composition (Typical Range)
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.12 – 0.21 |
| Manganese (Mn) | 0.45 – 0.70 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.030 |
| Silicon (Si) | 0.20 – 0.35 |
| Nickel (Ni) | 1.20 – 1.50 |
| Chromium (Cr) | 0.85 – 1.20 |
| Molybdenum (Mo) | 0.45 – 0.60 |
| Boron (B) | 0.001 – 0.005 |
⚙️ Mechanical Properties (Typical, May Vary by Grade)
| Property | Value |
|---|---|
| Yield Strength | ≥ 100 ksi (690 MPa) |
| Tensile Strength | 110 – 130 ksi (760–900 MPa) |
| Elongation in 2″ | ≥ 18% |
| Brinell Hardness | 235 – 300 HB |
📊 A514 vs. Other Structural Steels
| Property | A514 / T-1 Steel | A572 Grade 50 |
|---|---|---|
| Yield Strength | 100 ksi | 50 ksi |
| Tensile Strength | 110–130 ksi | 65–80 ksi |
| Heat Treatment | Quenched & Tempered | As-rolled |
| Applications | Cranes, Bridges, Mining | Buildings, Bridges |
| Weldability | Good with Preheat | Excellent |
| Plate Thickness | Up to 8″ | Typically <4″ |
✅ Practical Checklist: A514 Steel Plate Selection
| ✅ Item | ✔ Done |
|---|---|
| Determine if high-strength steel is needed | |
| Confirm required plate grade (B, Q, etc.) | |
| Match plate thickness with load capacity | |
| Check chemical and mechanical specs | |
| Plan for welding procedure and preheat | |
| Obtain material certifications (MTRs) |