A516 Grade 70(or ASME SA516 Grade 70) is a widely used pressure vessel quality (PVQ) carbon steel plate designed for moderate to low-temperature service, known for its excellent notch toughness, making it ideal for welded tanks and boilers that contain liquids or gases under pressure. It's a strong, versatile steel with controlled chemical compositions (manganese, silicon, carbon) and mechanical properties (tensile strength 70-90 ksi) that ensure reliability in demanding applications.
Chemical Composition
|
C |
Mn 1) |
P 2) |
S 2) |
Si |
|---|---|---|---|---|
|
0.25 |
0.85 - 1.20 |
0.020 |
0.010 |
0.40 |
Mechanical Properties
|
Grade |
Yield strength |
Tensile strength |
Elongation in 2" 1) |
Elongation in 8" 1) |
|---|---|---|---|---|
|
70 |
38 |
70 - 90 |
21 |
17 |
Key Applications:
Pressure Vessels:
The most common use, for containing liquids or gases under pressure, especially in the petrochemical sector. These vessels are widely employed in refineries, chemical plants, and offshore platforms, where they must reliably withstand internal pressure, temperature cycling, and corrosive environments. Due to its excellent strength and toughness, SA 387 steel is often specified for reactors, separators, and other critical pressure-containing equipment.
Boilers & Heat Exchangers:
Used for components in power generation where high temperatures and pressures are present. In both conventional and combined-cycle power plants, SA 387 steel is utilized for boiler drums, headers, and heat exchanger tubesheets. Its ability to maintain mechanical properties at elevated temperatures makes it suitable for steam generation systems that operate under harsh conditions for extended periods.
Storage Tanks:
For large-scale storage of liquids and gases, often meeting API 650/620 standards. SA 387 steel is commonly used in the construction of aboveground and underground tanks for crude oil, refined petroleum products, and various chemicals. Its good weldability and resistance to brittle fracture ensure the structural integrity of these large-volume storage facilities, even under seismic and environmental loads.
Cryogenic Equipment:
Suitable for very low-temperature applications like LNG storage due to its toughness. The material's ability to retain high impact strength at subzero temperatures makes it ideal for cryogenic tanks, piping, and processing equipment used in LNG terminals and other low-temperature industrial plants.
Industrial Equipment:
Fabrication of compressors, pipelines, and other structural parts. SA 387 steel is frequently chosen for heavy-duty industrial machinery components that require high strength and durability. It is also used in high-pressure pipeline systems for transporting oil, gas, and other fluids over long distances.
Structural Components:
Can be found in bridges, buildings, cargo containers, and transportation (trucks, railcars). In these applications, the steel provides a favorable combination of strength, toughness, and cost-effectiveness. It is used in bridge girders, building frames, and various transportation equipment where reliable performance under dynamic and static loads is essential.
If you want to learn more about (ASTM A516 Grade 70)GNEE's products, you can send an email to beam@gneesteelgroup.com. We are more than happy to assist you.
What is a 516 GR 70 equivalent to?
What is the equivalent material for A516 GR 70? Common equivalents include ASME SA516 GR 70, EN 10028 P355GH, and BS1501 224-490 A & B, suitable for similar pressure vessel applications.
What is A516 GR 70 material grade?
A516 Grade 70 is an excellent choice for service in lower than ambient temperature applications with excellent notch toughness and good weldability. This steel grade is used in both pressure vessel and industrial boilers and can withstand high pressure at different temperatures.
How does A516 Grade 70 compare to SA 285 Gr.C?
A516 Grade 70 has higher strength and significantly better low‑temperature toughness than SA 285 Gr.C. SA 285 Gr.C is a lower‑strength carbon steel for moderate service, while A516 Grade 70 is designed for more demanding applications, especially at lower temperatures.
What is the corrosion resistance of A516 Grade 70?
It has moderate corrosion resistance, typical of carbon steels. It is suitable for non‑corrosive or mildly corrosive services. In aggressive environments, coatings, linings, or higher‑alloy materials are recommended.
When should I choose A516 Grade 70 for my project?
Choose A516 Grade 70 when you need a pressure vessel steel with good strength, excellent low‑temperature toughness, and reliable weldability. It is ideal for storage tanks and pressure vessels handling liquefied gases, chemicals, or operating in cold climates.