Features of ASME SA 516 Grade 70 BQ Plates
ASME SA 516 Grade 70 BQ (Boiler Quality) plates are high-strength carbon steel plates primarily designed for use in pressure vessels and boilers. These plates are known for their excellent toughness and resistance to a wide range of corrosive and high-temperature environments. Here are some of the key features and characteristics of ASME SA 516 Grade 70 BQ plates:
High Tensile Strength: These plates have a minimum tensile strength of 70,000 psi (485 MPa), making them suitable for applications where high strength is required.
Good Yield Strength: They have a minimum yield strength of 38,000 psi (260 MPa), which means they can withstand high stress and pressure.
Excellent Toughness: SA 516 Grade 70 BQ plates have good impact resistance and toughness, making them suitable for low-temperature applications and environments with potential for sudden temperature changes.
Corrosion Resistance: These plates are often used in environments where corrosion is a concern, and they are typically supplied with a fine grain structure that enhances their resistance to corrosion.
Heat Resistance: SA 516 Grade 70 BQ plates are designed to withstand high-temperature and pressure conditions commonly found in boilers and pressure vessels.
>> What is ASME SA 516 Grade 70 BQ Plates?
ASME SA 516 Grade 70 BQ Plates, also known as ASME SA516-70 BQ Plates, are a specific type of high-strength carbon steel plates used primarily in the construction of pressure vessels and boilers. These plates are manufactured to meet the stringent requirements and standards set by the American Society of Mechanical Engineers (ASME).
Here’s a breakdown of what ASME SA 516 Grade 70 BQ Plates represent:
ASME SA 516: This indicates that the plates adhere to the ASME standards, particularly ASME SA 516/SA 516M, which outlines the specifications for carbon steel plates used in pressure vessels.
Grade 70: The “Grade 70” designation signifies the specific grade or strength level of the carbon steel. In this case, Grade 70 denotes a high-strength carbon steel plate.
BQ (Boiler Quality): The “BQ” designation indicates that these plates are manufactured to be suitable for use in boilers and other pressure vessel applications. They are known for their high-temperature and pressure resistance and are designed to withstand the demanding conditions within boilers.
ASME SA 516 Grade 70 BQ Plates are widely used in various industries, including petrochemical, power generation, and manufacturing, where pressure vessels and boilers are integral components of the production processes. These plates are appreciated for their excellent tensile strength, toughness, and resistance to corrosion and high temperatures, making them an ideal choice for such applications. We Jaguar Steel India are here to provide the world with different kinds of products in the sector for which we are working. Our company is a manufacturer, producer trader, exporter, dealer and supplier of SA 516 GR.70 PLATES.
>> Equivalent Grade of ASME SA 516 Grade 70 BQ Plates
The equivalent grade of ASME SA 516 Grade 70 BQ Plates can vary depending on the international standards used for comparison. The most common equivalent grades for ASME SA 516 Grade 70 BQ Plates are typically found in the ASTM and EN standards. Here are some equivalent grades:
ASTM A516 Grade 70: ASME SA 516 Grade 70 BQ Plates are essentially the same as ASTM A516 Grade 70 plates. These two standards are nearly identical, as ASME SA 516 is based on ASTM A516. The only difference is in the certification and marking, with ASME SA 516 plates having ASME-specific markings.
EN 10028-3 P355NH: In the European standard EN 10028-3, the closest equivalent grade to ASME SA 516 Grade 70 is EN 10028-3 P355NH. This grade is used in pressure vessel applications and is roughly comparable in terms of mechanical properties.
EQUIVALENT GRADE OF A516 GRADE 70 BOILER PLATES
| British Standard | European Norm | ASTM/ASME | DIN |
| BS1501-224-490A/B | EN10028 P355GH | A/SA516 – Grade 70 | – |
>> Specifications of ASME SA 516 Grade 70 BQ Plates
ASME SA 516 Grade 70 BQ Plates are subject to specific specifications outlined in ASME SA 516/SA 516M, which is the standard specification for pressure vessel plates, carbon steel, for moderate and lower-temperature service. These specifications are essential for ensuring the quality, safety, and performance of the plates in pressure vessel and boiler applications. Here are some key specifications of ASME SA 516 Grade 70 BQ Plates:
Material Type: Carbon steel plates designed for use in pressure vessels and boilers.
Grade: Grade 70 is the specific grade of carbon steel, indicating its high strength and suitability for these applications.
Tensile Strength: Minimum tensile strength of 70,000 psi (485 MPa).
Yield Strength: Minimum yield strength of 38,000 psi (260 MPa).
Thickness: ASME SA 516 Grade 70 BQ Plates are available in various thicknesses, typically ranging from 1/4 inch to 4 inches or more, depending on the application and design requirements.
Width and Length: These plates come in various dimensions to accommodate different pressure vessel and boiler designs. Common sizes include 48″ x 96″, 60″ x 120″, and so on.
Heat Treatment: The plates may undergo heat treatment processes, such as normalization, to improve their mechanical properties and toughness.
Chemical Composition: The chemical composition of the plates is specified to ensure they meet certain requirements. This typically includes a balance of elements such as carbon, manganese, phosphorus, sulfur, silicon, and traces of other elements.
Certification: ASME SA 516 Grade 70 BQ Plates are often supplied with certification and testing documentation to verify that they meet the specified mechanical and chemical properties.
Testing: These plates may undergo various tests, including impact testing, hardness testing, and ultrasonic testing, to ensure their quality and safety.
SPECIFICATION
| Grade | ASME SA 516 GR.70 Boiler and Pressure Vessel Steel Plates |
| Width | 1500mm-3000mm |
| Thickness | 3 – 200 mm/ dimensions up to 4.000 mm |
| Length | 3000mm-11000mm |
| Production | Hot-Rolled (HR) |
| Heat Treatment | Rolled/Normalised/N+T/QT |
>> Chemical Composition of ASME SA 516 Grade 70 BQ Plates
The chemical composition of ASME SA 516 Grade 70 BQ Plates is specified to ensure they meet certain requirements and standards for pressure vessel and boiler applications. The composition is generally controlled to provide the desired mechanical properties and resistance to high-temperature and high-pressure conditions. Here is a typical chemical composition for ASME SA 516 Grade 70 BQ Plates:
- Carbon (C): 0.27% – 0.31% (max)
- Manganese (Mn): 0.85% – 1.20% (max)
- Phosphorus (P): 0.035% (max)
- Sulfur (S): 0.035% (max)
- Silicon (Si): 0.15% – 0.40% (max)
CHEMICAL COMPOSITION OF A516 BQ GR.70 STEEL PLATES
| C | Si | Mn | P | S | AI | Cr | Cu | Ni | Mo | Nb | Ti | V |
| 0.18 | 0.4 | 0.95/1.50 | 0.015 | 0.008 | 0.02 (Min) | 0.3 | 0.3 | 0.3 | 0.08 | 0.01 | 0.03 | 0.02 |
>> Mechanical Properties of ASME SA 516 Grade 70 BQ Plates
The mechanical properties of ASME SA 516 Grade 70 BQ Plates are important to understand how these plates will perform in various applications, particularly in pressure vessels and boilers. Here are the typical mechanical properties of ASME SA 516 Grade 70 BQ Plates:
Tensile Strength: The minimum tensile strength of ASME SA 516 Grade 70 BQ Plates is typically around 70,000 psi (485 MPa). This represents the maximum stress the material can withstand when subjected to a stretching or pulling force. It’s a measure of the material’s strength.
Yield Strength: The minimum yield strength for these plates is about 38,000 psi (260 MPa). Yield strength indicates the stress at which the material begins to deform plastically, meaning it doesn’t return to its original shape after the load is removed.
Elongation: The plates typically have a minimum elongation of 17% (in 2 inches) or 21% (in 50mm). Elongation measures the material’s ability to stretch without breaking and is an indicator of its ductility.
Reduction in Area: The minimum reduction in area is typically about 45%. This parameter measures how much the cross-sectional area of a test specimen is reduced during the tensile test and is related to ductility.
Impact Test: ASME SA 516 Grade 70 BQ Plates are often subjected to impact tests to assess their toughness, particularly at low temperatures. The impact test measures the energy absorbed by the material during impact, and it’s crucial for ensuring the plates can withstand sudden temperature changes and maintain their integrity.
MECHANICAL PROPERTIES OF BOILER QUALITY STEEL PLATES
| Tensile strength (ksi) | Yield strength (ksi) | Elongation min, % 200 mm (8 in) | Elongation min, % 50 mm (2 in) |
| 485-620 (70-90) | 260 (38) | 17 | 21 |
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