ASME SA516 Gr.70N Carbon Steel Tubesheet, Pressure Vessel Plate For Heat Exchangers
ASME SA516 Gr.70N carbon steel tubesheet is a common specification for carbon steel tubesheets used in pressure vessels or heat exchangers. It indicates the material's properties and strength characteristics. This steel plate has good weldability, and excellent notch toughness, making it suitable for boiler plates’ fabrication. ASTM A516 Gr.70N carbon steel tubesheet can be used in the oil, petrochemical and gas industries.
What is ASTM A516 Gr.70N?
ASTM A516 Gr.70N is a normalized carbon steel plate grade that is primarily used in pressure vessel applications. The "N" in ASTM A516 Gr.70N indicates that the material has been normalized, which means it has been heated to a temperature above the transformation range and then air-cooled to relieve internal stresses.
What is the difference between ASME SA516 Gr.70 and Gr.70N gardes?
ASME SA516 Gr.70: This grade refers to a carbon steel plate specification that is used for moderate and lower temperature service in pressure vessels. It is normalized and has a specified minimum tensile strength of 70,000 psi.
ASME SA516 Gr.70N: The "N" in Gr.70N stands for normalized, indicating that this grade has undergone a normalization process. Normalizing the steel improves its mechanical properties by refining its grain structure and enhancing its toughness. The normalized version is often used in applications where improved notch toughness is required.
Equivalent Grades:
| British Standard | European Norm | ASTM/ASME |
| BS1501-224-490A/B | EN10028 P355GH | ASME SA516 Gr.70N |
Chemical Composition:
| C | Si | Mn | P | S | Al | Cr | Cu | Ni | Mo | Nb | Ti | V |
| 0.18 | 0.4 | 0.95-1.5 | 0.015 | 0.008 | 0.02 | 0.3 | 0.3 | 0.3 | 0.08 | 0.01 | 0.03 | 0.02 |
Mechanical Properties:
| Tensile strength | 70-90 Ksi, 485-620 MPa |
| Yield strength | 38 Ksi, 260 MPa |
| Elongation in 200mm (min) | 17 % |
| Elongation in 50mm (min) | 21 % |
Applications:
Heat Exchangers: Tubesheets are essential components in shell-and-tube heat exchangers, where they provide support for the heat exchange tubes. The ASME SA516 Gr.70N tubesheets help withstand high temperature and pressure differentials
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Pressure Vessels: Tubesheets are used in the fabrication of pressure vessels such as boilers, reactors, and distillation columns. The Gr.70N grade ensures the tubesheet can withstand the demanding conditions within the vessel.
Condensers: In condensers, tubesheets are employed to support the tubes through which the hot gas or vapor passes to transfer heat to the cooling medium. The ASME SA516 Gr.70N tubesheets provide mechanical strength and corrosion resistance.
Industrial Furnaces: Tubesheets play a role in the construction of industrial furnaces for applications like heat treatment and material processing. The Gr.70N carbon steel provides the necessary strength and durability for these high-temperature environments.
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ASME SA516 Gr.70N Carbon Steel Tubesheet, Pressure Vessel Plate For Heat Exchangers Images
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