ASTM A516 Grade 55
ASTM A516 Grade 55 introduction
Steel for pressure vessels and boilers differ from other carbon-manganese structural steels due to their high resistance to pressure at all temperatures (ambient, low or high).
The fundamental property of steels for pressure vessels is their ability to withstand high pressure at different temperatures. They have good weldability, as well as excellent toughness, and are suitable for normalisation annealing and stress-relief annealing (both treatments neutralise local hardening caused by welding).
ASTM A516 Grade 55 general
| Property |
Value |
Comment |
| Elongation |
Elongation of 23 % |
min. | for thickness 5-150 mm | A8 | Transverse |
| - |
Elongation of 27 % |
min. | for thickness 5-150 mm | A2 | Transverse |
| Tensile strength |
Tensile strength of 380 - 515 MPa |
for thickness 5-150 mm | Transverse |
| Yield strength |
Yield strength of 205 MPa |
min. | for thickness 5-150 mm | Transverse |
ASTM A516 Grade 55 thermal
| Property |
- |
- |
| Application areas |
| Chemical composition |
| Delivery condtion |
| Other |
ASTM A516 Grade 55 mechanical
| Property |
Value |
Comment |
| Carbon |
Carbon of 0.18 % |
max. | for thickness 5-12.5 mm |
| - |
Carbon of 0.2 % |
max. | for thickness 25-50 mm |
| - |
Carbon of 0.22 % |
max. | for thickness 50-80 mm |
| Manganese |
Manganese of 0.6 - 1.2 % |
for thickness 5-80 mm |
| Phosphorus |
Phosphorus of 0.025 % |
max. | for thickness 5-80 mm |
| Silicon |
Silicon of 0.15 - 0.4 % |
for thickness 5-80 mm |
| Sulfur |
Sulfur of 0.025 % |
max. | for thickness 5-80 mm |
