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ASME SA516 GR 60 has a tensile strength of 415-550 MPa and higher ductility, while SA516 GR 70 offers 485-620 MPa for higher-pressure applications.Gangsteel manufactures both ASME SA 516 GR 60 and ASME SA 516 GR 70, tailored for pressure vessel needs. This article compares their composition, properties, and applications to guide material selection.
ASME SA516, equivalent to ASTM A516, is a carbon steel specification for pressure vessel plates used in moderate and low-temperature service. SA516 GR 60, also known as ASTM A 516 GR 60, is designed for moderate-pressure applications with higher ductility, while SA516 GR 70, equivalent to ASTM A 516 GR 70, prioritizes higher strength for high-pressure vessels. Both grades are fine-grain treated, ensuring excellent toughness and weldability.
Gangsteel produces dual-certified SA516/A516 plates, meeting ASME BPVC and ASTM standards for global applications in oil, gas, and petrochemical industries.
The chemical compositions of SA516 GR 60 and GR 70 differ slightly, with GR 70 having a higher carbon content for increased strength:
|
Element |
SA 516 GR 60 (% by Weight) |
SA 516 GR 70 (% by Weight) |
Notes |
|---|---|---|---|
|
Carbon (C) |
≤.27 |
≤0.31 |
GR 70’s higher carbon increases strength but slightly reduces ductility. |
|
Manganese (Mn) |
0.60 - 1.20 |
0.79 - 1.30 |
GR 70’s higher range enhances tensile strength. |
|
Phosphorus (P) |
≤0.025 |
≤0.025 |
Low levels ensure weldability and toughness in both grades. |
|
Sulfur (S) |
≤0.025 |
≤0.025 |
Low sulfur supports HIC resistance for sour service applications. |
|
Silicon (Si) |
0.15 - 0.40 |
0.15 - 0.40 |
Identical, aids deoxidation and manufacturability. |
|
Aluminum (Al) |
≥0.02 |
≥0.02 |
Ensures fine-grain structure (killed steel) for both grades. |
Gangsteel’s SA516 GR 70 plates are tested for HIC per NACE TM0284, with sulfur content as low as 0.003%, ensuring reliability in sour gas environments. SA516 GR 60’s lower carbon content enhances weldability for applications requiring higher formability.
The mechanical properties highlight the trade-off between strength and ductility:
|
Property |
SA 516 GR 60 |
SA 516 GR 70 |
Notes |
|---|---|---|---|
|
Tensile Strength |
415 - 550 MPa |
485 - 620 MPa |
GR 70 is stronger, ideal for high-pressure vessels. |
|
Yield Strength (min) |
220 MPa |
260 MPa |
GR 70 offers better resistance to deformation. |
|
Elongation (min, 200 mm) |
21% |
17% |
GR 60 is more ductile, suitable for moderate-pressure applications. |
|
Elongation (min, 50 mm) |
25% |
21% |
Higher ductility in GR 60 for shorter gauges. |
|
Charpy V-Notch Impact |
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