A515 grade 60 steel is a carbon-silicon steel plates primarily for intermediate- and higher-temperature service in welded boilers and other pressure vessels.
A516 grade 60 steel is also a carbon steel plates. It is intended primarily for service in welded pressure vessels where improved notch toughness is important.
Chemical composition
Grade |
C |
Mn |
P |
S |
Si |
|
A515 grade 60 |
0.24-0.31 |
0.98 |
0.035 |
0.035 |
0.13-0.45 |
Grades |
Maximum C % for thickness t (mm) |
Mn % for thickness t (mm) |
Si % |
P % max |
S % max |
||||
|
6-12.5mm |
12.5-25mm |
25-50mm |
>50mm |
≤12.5mm |
>12.5mm |
||||
|
A516 Grade 60 |
0.21 |
0.23 |
0.23 |
0.25 |
0.6-0.9 |
0.80-1.20 |
0.13-0.45 |
0.035 |
0.035 |
Mechanical requirements
Grade |
Thickness mm |
Yield strength Min Mpa |
Tensile strength Mpa |
Elongation Min % |
|
A515 grade 60 |
200 |
220 |
415-550 |
21 |
|
Grades |
Tensile strength (MPa) |
Minimum yield strength (MPa) |
Minimum elongation (%) gauge length |
|
|
50mm |
200mm |
|||
|
A516 Grade 60 |
415 - 550 |
220 |
25 |
21 |
key differences
ASTM A515 Grade 60 (Intermediate/High Temp)
Primary Use: Welded boilers and pressure vessels at higher temperatures.
Grain Size: Often made with a coarse austenitic grain size.
Key Characteristic: Designed for strength at elevated temperatures, with carbon/silicon as primary alloying elements.
ASTM A516 Grade 60 (Moderate/Low Temp)
Primary Use: Welded pressure vessels needing improved notch toughness at moderate to lower temperatures.
Grain Size: Conforms to fine grain requirements (like A20/A20M) for better toughness.
Key Characteristic: Focuses on toughness (impact resistance) at colder service temperatures, with controlled carbon and manganese.
Key Comparative Points (Grade 60 vs. Grade 60):
Temperature: A515 for hotter, A516 for colder/moderate.
Toughness: A516 is inherently tougher (better notch toughness).
Chemistry: Carbon content in A516 can be lower or controlled differently by thickness than A515, influencing its low-temp performance.
Mechanicals: Similar strength (Yield ~220 MPa, Tensile ~415-550 MPa) but different elongation specs.
In essence, choose A515 Gr 60 for hot service and A516 Gr 60 for cold/moderate service where impact resistance is critical.
