Many customers ask the same question when selecting steel for boilers and pressure vessels: What grade of steel does boiler plate actually belong to?
In reality, "boiler steel plate" is not a generic term but refers to specialized plates designed for pressure-bearing equipment, falling under the pressure vessel steel grade category. This type of steel plate must meet stringent requirements for strength, toughness, weldability, and resistance to high temperatures and pressures. Among the numerous boiler steel plate grades, A516 Gr. 70 stands as the most widely used and consistently reliable primary material, serving as our company's core product. Should you require this steel plate, please feel free to contact us at any time.
I. What grade of steel is A516 Gr.70?
A516 Gr.70 is a carbon steel plate for medium- and low-temperature pressure vessels under the American ASME/ASTM standards. It is a specialized 70-grade strength steel for boilers and pressure vessels.
Its key distinction from ordinary steel plates lies in its specialized design for boilers and pressure vessels. It offers higher purity, superior impact toughness, and more stable weldability, ensuring long-term safe operation under pressure and temperature conditions.
Standards: ASTM A516 / ASME SA516
Material Category: High-quality carbon structural steel (carbon-manganese steel)
Strength Grade: Gr.70 (Tensile Strength ≥485MPa)
Applications: Medium-low temperature, pressure-bearing, welded structures
II. Why is A516 Gr. 70 Suitable for Boiler Steel Plates?
As a common material for boilers and pressure vessels, A516 Gr. 70 offers distinct advantages:
Moderate Strength for Reliable Pressure Resistance
With a tensile strength of 485-620 MPa, A516 Gr. 70 steel plates meet the pressure requirements for most medium- and low-pressure boilers, steam drums, and heat exchangers.
01
Excellent Low-Temperature Toughness, Resistant to Brittle Fracture
It maintains good toughness at -46°C, making it suitable for low-temperature storage tanks and boiler auxiliary equipment.
02
Superior Weldability
The A516 Gr. 70 steel plates supplied by our company undergo strict carbon content control. They exhibit excellent cold and hot workability and weldability, minimizing cracking risks and reducing processing costs.
03
High-Temperature Stability
Suitable for common medium-temperature boiler conditions, it maintains stable microstructure and high safety during long-term operation.
04
Internationally recognized and widely accepted
A516 Gr. 70 is a globally prevalent grade in the boiler and pressure vessel industry, commonly used in both exported and imported equipment.
05
III. In Which Boilers/Pressure Vessels Is A516 Gr70 Primarily Used?
Boiler drums, boiler shells, steam generators
Pressure components for medium- and low-pressure boilers, power station boilers
Heat exchangers, reactors, separators
Liquefied petroleum gas (LPG) storage tanks, spherical tanks, chemical storage tanks
IV. Summary
Boiler steel plates are specialized pressure-bearing materials for pressure vessels. Among them, A516 Gr70 stands as the most balanced and widely applied Grade 70 carbon steel plate under the American standard. It combines strength, toughness, weldability, and high-temperature resistance, making it a classic primary material for boiler and pressure vessel manufacturing.
We specialize year-round in A516 Gr.70 steel plates, offering comprehensive specifications and consistent quality that meet diverse industry standards for boilers and pressure vessels. We provide reliable material assurance for safe and dependable equipment operation. Contact us anytime!
