Boiler Plate
Ready to Ship
ASTM A516 Grade 70 Pressure Vessel Plate
ASTM A516 / ASME SA516 Grade 70 (A516-70N) is a premium carbon steel plate engineered for pressure vessel applications. With strictly controlled chemical composition, it provides superior notch toughness and weldability. Original Mill Test Certificates provided.
High Performance
Industrial Material
Industrial Material
Why Specify ASTM A516 Grade 70 for Pressure Vessels?
In safety-critical engineering, the ASTM A516 (or ASME SA516) standard is globally recognized for pressure vessel plates. The steel's chemical compositionâspecifically Carbon, Manganese, Phosphorus, and Sulfurâis strictly controlled. This ensures the steel maintains high notch toughness and will not become brittle or fracture under high pressure or fluctuating temperatures.
Comparison: Grade 60 vs Grade 70
| Properties | Grade 60 | Grade 70 |
|---|---|---|
| Tensile Strength | Moderate (415-550 MPa) | High (485-620 MPa) |
| Weldability | Excellent | Very Good |
| Popularity in Thailand | Low | Highest (Industry Standard) |
Technical Specifications
Standard: ASTM A516 / ASME SA516
Grades: 60, 65, 70
Heat Treatment: As Rolled or Normalized (Mandatory for thicknesses over 40mm)
Chemical Composition (Max %)
| Grade | Carbon (C) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) | Silicon (Si) |
|---|---|---|---|---|---|
| Gr.70 | 0.27 - 0.31 | 0.85 - 1.20 | 0.035 | 0.035 | 0.15 - 0.40 |
*Maximum values may vary depending on plate thickness.
Standard Stock Sizes: ASTM A516 Grade 70
| Thickness (mm) | 5' x 20' (1524 x 6096 mm) | Custom Cut-to-Size (Gas/Plasma) |
|---|---|---|
| 6.0 - 9.0 | â | â |
| 10.0 - 12.0 | â | â |
| 15.0 - 20.0 | â | â |
| 25.0 - 50.0+ | â | â |
â = In Stock | Custom Gas and Plasma CNC cutting available based on your CAD drawings.
Frequently Asked Questions (FAQ)
Normalizing is a heat treatment process that refines the grain structure of the steel, significantly improving its notch toughness. According to ASTM standards, plates over 40mm (1.5 inches) thick must be normalized. However, thinner plates can also be ordered in normalized condition (A516-70N) if your project requires maximum performance and safety.
Absolutely not. SS400 is a general structural steel that does not guarantee notch toughness or safe performance under high pressure and fluctuating temperatures. Using incorrect steel grades for pressure vessels violates engineering codes and poses a severe risk of catastrophic failure (explosion).
