ASTM A633 Grade D is a normalized high-strength low-alloy structural steel with the following properties:
| Property | Value |
|---|---|
| Yield Strength (min) | 345 MPa (50 ksi) for thickness ≤ 65 mm |
| Tensile Strength | 485-620 MPa (70-90 ksi) for thickness ≤ 65 mm |
| Elongation in 8″ (min) | 18% |
Chemical Composition:
| Element | Percentage |
|---|---|
| Carbon (max) | 0.20% |
| Silicon | 0.15-0.50% |
| Manganese | 0.70-1.35% |
| Phosphorus (max) | 0.035% |
| Sulfur (max) | 0.04% |
ASTM A633 Grade D steel is commonly used in:
ASTM A633 Grade D is normalized by heat treatment to achieve a fine austenitic grain size. Available dimensions include:
| Thickness (mm) | Width (mm) | Length (mm) |
|---|---|---|
| 8 – 100 | 1500 – 4020 | 3000 – 27000 |
ASTM A633 Grade D has excellent weldability. It is presupposed that a welding procedure suitable for the grade of steel and intended use or service will be utilized. The material exhibits good cold forming characteristics.
| Grade | Yield Strength (min MPa) | Tensile Strength (MPa) |
|---|---|---|
| A | 290 | 430-570 |
| C | 345 (≤ 65 mm thickness) | 485-620 |
| D | 345 (≤ 65 mm thickness) | 485-620 |
| E | 415 (≤ 100 mm thickness) | 550-690 |
ASTM A633 Grade D offers superior notch toughness performance at low ambient temperatures, making it suitable for applications requiring improved toughness compared to as-rolled materials of similar strength. Its normalized structure provides consistent properties throughout the material, enhancing its reliability in critical applications.
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