A515 Grade 70 is a carbon-silicon steel plate specified by ASTM for pressure vessels and boilers operating at moderate to high temperatures, known for its high strength (minimum 70 ksi tensile) and good weldability, making it a strong choice for demanding containment applications, though it's not for sour service or extremely low-temp impact toughness.
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Specifications |
ASTM A515 |
|
Thickness |
8-100mm |
|
Width |
1500-3500mm |
|
Length |
3000-8000mm |
|
Surface |
2B, 2D, BA, NO.1, NO.4, NO.8, 8K, mirror, checkered, embossed, hair line, sand blast, Brush, etching, etc |
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Finish |
Hot rolled plate (HR), Cold rolled sheet (CR) |
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Form |
Coils, Foils, Rolls, Plain Sheet, Shim Sheet, Strip etc. |
Chemical Composition
|
Grade |
C |
Mn |
P |
S |
Si |
|
A515 Grade 70 |
0.30-0.35 |
1.30 max |
0.035 max |
0.035 max |
0.13-0.45 |
Mechanical Properties
|
Grade |
Thickness |
Yield |
Tensile |
Elongation |
|
A515 Grade 70 |
50-200mm |
MPa -551 min |
MPa – 485-620 |
17-21% |
applications
Oil and gas industry pressure-bearing equipment
It is a core material for fabricating pressure vessels used in hydrocarbon exploration, refining, and storage, capable of withstanding harsh working conditions involving pressure fluctuations and corrosive media contact.
Boilers and heat exchangers
Widely applied in the construction of industrial boilers and heat exchange units for power generation, heating systems, and chemical processing, as it maintains stable structural performance under long-term elevated-temperature and pressure service.
Industrial storage tanks
Utilized to manufacture storage tanks for pressurized liquids and high-temperature fluids, meeting the safety and durability requirements of chemical, petrochemical, and energy storage sectors.
Other pressure-sensitive components
Adopted for producing reactor shells, pressure headers, and related critical parts in chemical plants and metallurgical facilities, where resistance to thermal fatigue and pressure-bearing capacity are essential.
Advantages
Superior Strength & Toughness:
Provides high tensile strength (485-620 MPa) and good toughness, ensuring structural integrity under high pressure and temperature.
High-Temperature Performance:
Designed specifically for elevated temperatures in boilers, heat exchangers, and pressure vessels.
Excellent Weldability:
Its balanced chemistry allows for reliable welding using common techniques.
Good Formability:
Readily formed by conventional methods, useful for complex shapes.
Versatility: Suitable for many industries (petrochemical, power, chemical) and applications, including fasteners and structural components.
Cost-Effective:
Offers a strong balance of performance and cost compared to other high-temp materials.
Request a professional quotation for A515 Grade 70 from GNEE Steel.
What is the difference between A515 grade 70 and A516 70?
SA-516-70 is commonly used for pressure vessels where moderate and lower temperature service is required. SA515 GR 70 is used for intermediate and higher temperature service applications. ASME standards: Both materials adhere to specific ASME standards for pressure vessel applications.
Is A516-70 killed carbon steel?
Both grades are fully killed carbon steels with excellent weldability using standard processes (SMAW, GTAW, SAW). However: ASTM A516 GR 70: Higher carbon content requires careful welding to avoid hardness issues, but normalization enhances weld quality.