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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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Chemical composition of A204/A204M Gr.C steel plate:
C: ≤0.23% for thickness ≤25mm;
≤0.26% for thickness >25-50mm;
≤0.28% for thickness >50-100mm;
≤0.28% for thickness >100mm
Si: 0.15%-0.40%
Mn: ≤0.90%
P: ≤0.025%
S: ≤0.025%
Mo: 0.45%-0.60%
Mechanical properties of A204 Gr.C steel plate:
Tensile strength: 515-655 MPa;
Yield strength: ≥295 MPa;
Elongation: ≥16% at a gauge length of 200 mm; ≥20% at a gauge length of 50 mm.
A204 Gr.C steel plate possesses excellent mechanical properties and high elongation, meeting the strength requirements of various pressure vessels.
In addition, A204 Gr.C steel plates have good corrosion resistance and weldability, and can maintain the stability and integrity of the structure in harsh environments.
C: ≤0.23% for thickness ≤25mm;
≤0.26% for thickness >25-50mm;
≤0.28% for thickness >50-100mm;
≤0.28% for thickness >100mm
Si: 0.15%-0.40%
Mn: ≤0.90%
P: ≤0.025%
S: ≤0.025%
Mo: 0.45%-0.60%
Mechanical properties of A204 Gr.C steel plate:
Tensile strength: 515-655 MPa;
Yield strength: ≥295 MPa;
Elongation: ≥16% at a gauge length of 200 mm; ≥20% at a gauge length of 50 mm.
A204 Gr.C steel plate possesses excellent mechanical properties and high elongation, meeting the strength requirements of various pressure vessels.
In addition, A204 Gr.C steel plates have good corrosion resistance and weldability, and can maintain the stability and integrity of the structure in harsh environments.