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Executive Standard: SA299 Gr. B steel plates comply with the ASME standard, specifically ASTM A299/A299M.2026-08-26
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SA299 is a carbon-manganese-silicon steel plate designed for pressure vessels—often referred to as "gas drum steel" under US standards.2026-08-19
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ntroduction to SA299 Gr.A Steel Plate:
SA299 Gr.A is a steel plate grade designated for boilers and pressure vessels under American standards.2026-08-11 -
A285 Gr.C and SA285 Gr.C steel plates represent the same grade, though they are governed by different standards.2026-08-04
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SA283 Gr.B is a low-to-medium strength carbon structural steel plate conforming to the American Society of Mechanical Engineers (ASME) standard.2026-07-31
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Executive Standard: SA299 Gr. B steel plates comply with the ASME standard, specifically ASTM A299/A299M.
Chemical composition of SA299 Gr.B steel plate:
Carbon (C): ≤0.30%
Silicon (Si): 0.15%–0.40%
Manganese (Mn): 0.90%–1.50%
Phosphorus (P): ≤0.035%
Sulfur (S): ≤0.035%
Influence of chemical composition on the properties of SA299 Gr.B steel plate:
Strength and hardness: The addition of appropriate amounts of carbon and manganese imparts high strength and hardness to the SA299 Gr.B steel plate, enabling it to meet the requirements of various complex engineering applications.
Toughness and impact resistance: The inclusion of manganese enhances the steel plate's toughness and impact resistance, making it less prone to fracture when subjected to impact loads.
Weldability: The addition of silicon improves weldability, ensuring that the SA299 Gr.B steel plate is resistant to cracking and deformation during welding and yields high-quality weld seams.
Heat resistance: The addition of an appropriate amount of silicon also helps improve heat resistance, allowing the steel plate to maintain stable performance in high-temperature environments.
Corrosion resistance: Special surface treatment, combined with an optimized chemical composition, gives the SA299 Gr.B steel plate excellent corrosion resistance, enabling it to withstand degradation caused by environmental factors such as oxidation and corrosion.
SA299 Gr.B steel plate exhibits excellent mechanical properties, primarily including:
Tensile strength: 550–690 MPa
Yield strength: Varies based on plate thickness; for thicknesses of 25 mm or less, the yield strength must be at least 325 MPa; for thicknesses exceeding 25 mm, it must be at least 310 MPa.
Elongation: Demonstrates outstanding performance, with elongation of at least 16% for a 200 mm gauge length and at least 19% for a 50 mm gauge length.
In addition, SA299 Gr.B steel plate offers good low-temperature toughness and fatigue resistance, making it suitable for a wide range of complex operating environments.
Chemical composition of SA299 Gr.B steel plate:
Carbon (C): ≤0.30%
Silicon (Si): 0.15%–0.40%
Manganese (Mn): 0.90%–1.50%
Phosphorus (P): ≤0.035%
Sulfur (S): ≤0.035%
Influence of chemical composition on the properties of SA299 Gr.B steel plate:
Strength and hardness: The addition of appropriate amounts of carbon and manganese imparts high strength and hardness to the SA299 Gr.B steel plate, enabling it to meet the requirements of various complex engineering applications.
Toughness and impact resistance: The inclusion of manganese enhances the steel plate's toughness and impact resistance, making it less prone to fracture when subjected to impact loads.
Weldability: The addition of silicon improves weldability, ensuring that the SA299 Gr.B steel plate is resistant to cracking and deformation during welding and yields high-quality weld seams.
Heat resistance: The addition of an appropriate amount of silicon also helps improve heat resistance, allowing the steel plate to maintain stable performance in high-temperature environments.
Corrosion resistance: Special surface treatment, combined with an optimized chemical composition, gives the SA299 Gr.B steel plate excellent corrosion resistance, enabling it to withstand degradation caused by environmental factors such as oxidation and corrosion.
SA299 Gr.B steel plate exhibits excellent mechanical properties, primarily including:
Tensile strength: 550–690 MPa
Yield strength: Varies based on plate thickness; for thicknesses of 25 mm or less, the yield strength must be at least 325 MPa; for thicknesses exceeding 25 mm, it must be at least 310 MPa.
Elongation: Demonstrates outstanding performance, with elongation of at least 16% for a 200 mm gauge length and at least 19% for a 50 mm gauge length.
In addition, SA299 Gr.B steel plate offers good low-temperature toughness and fatigue resistance, making it suitable for a wide range of complex operating environments.