ASTM A515 Grade 60 and Grade 65 are carbon steel plates for pressure vessels, differing primarily in strength; Grade 65 offers higher tensile and yield strength (e.g., ~450-590 MPa tensile vs. ~415-550 MPa for Grade 60) but slightly less ductility (elongation), with Grade 65 having slightly higher carbon content for increased strength, making Grade 60 more ductile for less demanding roles and Grade 65 better for higher-stress, moderate-temperature service.
Chemical Composition of ASTM A515 Grade 60
|
Element |
Product Analysis Max (%) |
Ladle Analysis Max (%) |
|---|---|---|
|
Carbon (C) |
0.24-0.31 |
0.24-0.31 |
|
Manganese (Mn) |
0.98 |
0.90 |
|
Phosphorus (P) |
0.035 |
0.035 |
|
Sulfur (S) |
0.035 |
0.035 |
|
Silicon (Si) |
0.13-0.45 |
0.15-0.40 |
Chemical Composition of ASTM A515 Grade 65
|
Element |
Product Analysis Max (%) |
Ladle Analysis Max (%) |
|---|---|---|
|
Carbon (C) |
0.28-0.33 |
0.28-0.33 |
|
Manganese (Mn) |
0.98 |
0.90 |
|
Phosphorus (P) |
0.035 |
0.035 |
|
Sulfur (S) |
0.035 |
0.035 |
|
Silicon (Si) |
0.13-0.45 |
0.15-0.40 |
Mechanical Properties of ASTM A515 Grade 60
|
Thickness (mm) |
Yield Strength (Min Mpa) |
Tensile Strength (Mpa) |
Elongation (Min %) |
|---|---|---|---|
|
≤ 200 |
220 |
415-550 |
21 |
|
≤ 50 |
220 |
415-550 |
25 |
Mechanical Properties of ASTM A515 Grade 65
|
Thickness (mm) |
Yield Strength (Min Mpa) |
Tensile Strength (Mpa) |
Elongation (Min %) |
|---|---|---|---|
|
≤ 200 |
240 |
450-585 |
19 |
|
≤ 50 |
240 |
450-585 |
23 |
ASTM A515 Grade 60
Strength: Lower minimum tensile and yield strength.
Mechanical Properties: Tensile strength ~415-550 MPa (60-80 ksi), Minimum Yield ~207 MPa (30 ksi).
Ductility: Higher elongation (more ductile).
Best For: Less demanding applications requiring more ductility.
ASTM A515 Grade 65
Strength: Higher minimum tensile and yield strength.
Mechanical Properties: Tensile strength ~450-590 MPa (65-85 ksi), Minimum Yield ~241 MPa (35 ksi).
Ductility: Slightly lower elongation (less ductile than Gr. 60).
Best For: Moderate-temperature service and higher-stress applications where balanced strength is needed.
