ASTM A516 Grade 70 Pressure Vessel Steel
ASTM A516/A516M · Updated: 2026-05-23
ASTM A516 Grade 70 is the most widely used carbon steel for pressure vessels, boilers, and storage tanks operating at moderate and lower temperatures. It features carefully controlled carbon content (0.27-0.31%), fine-grain practice with silicon-killed deoxidation, and mandatory notch-toughness testing. Available in four quality classes (55, 60, 65, 70) corresponding to tensile strength in ksi. Grade 70 provides the highest strength for thinner vessel walls, reducing weight while maintaining ASME Boiler Code compliance.
Quick Facts
| Category | Carbon Steel |
| Standard | ASTM A516/A516M |
| Density | 7.85 g/cm³ |
| Yield Strength | 260 MPa (38 ksi) |
| Tensile Strength | 485-620 MPa (70-90 ksi) |
Global Equivalents & Cross-Reference
| Alternative Standard / Grade | Action |
|---|---|
| SA-516 Gr70 | Compare |
| P355GH | Compare |
| P295GH | Compare |
| SPV355 | Compare |
| SGV480 | Compare |
Related Materials
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Frequently Asked Questions
What temperature range is A516 Gr 70 rated for?
A516 Gr 70 is typically rated for service from -46°C to +370°C (-50°F to +700°F) depending on impact testing requirements. For lower temperatures, normalized A516 Gr 70N with supplementary Charpy testing can extend service to -50°C. For cryogenic service below -46°C, consider 304 stainless steel or 9% nickel steel instead.